WO2023195516A1 - ペプチド化合物の製造方法 - Google Patents
ペプチド化合物の製造方法 Download PDFInfo
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- WO2023195516A1 WO2023195516A1 PCT/JP2023/014205 JP2023014205W WO2023195516A1 WO 2023195516 A1 WO2023195516 A1 WO 2023195516A1 JP 2023014205 W JP2023014205 W JP 2023014205W WO 2023195516 A1 WO2023195516 A1 WO 2023195516A1
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- peptide
- amino acid
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- fmoc
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/06—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length using protecting groups or activating agents
- C07K1/08—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length using protecting groups or activating agents using activating agents
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/06—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length using protecting groups or activating agents
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/04—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers
- C07K1/042—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers characterised by the nature of the carrier
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C267/00—Carbodiimides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/04—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length on carriers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/06—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length using protecting groups or activating agents
- C07K1/061—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length using protecting groups or activating agents using protecting groups
Definitions
- the present invention relates to a method for producing a peptide compound.
- Peptides are molecules made up of many amino acids linked together, and play an essential role in the life activities of organisms. With the development of biology and chemistry, the understanding of peptides has deepened, and the use of natural peptides with the aim of creating new medicines, as well as research and development of functional peptides by artificially designing peptides, are actively being carried out. Patent Document 1).
- Non-patent Document 2 Non-patent Document 3
- Non-Patent Document 4 a liquid phase method and a solid phase method
- the solid phase method is a method in which a target peptide is synthesized by sequentially bonding amino acids using a polymer resin (resin for solid phase synthesis) as a stationary phase
- Non-Patent Document 5 a polymer resin (resin for solid phase synthesis) as a stationary phase
- Non-Patent Document 6 peptide array technology using membranes such as cellulose as a stationary phase has evolved, and is attracting attention as a technology for rapidly and automatically synthesizing peptides for many samples in small amounts
- Non-Patent Document 6 peptide array technology that uses a membrane such as cellulose as a stationary phase
- drug-like peptides contain a large amount of N-alkyl amino acids, making the amidation reaction difficult to synthesize.
- Non-Patent Document 7 when the reaction conditions described in Non-Patent Document 7 were used in the amidation reaction between N-methylphenylalanine bound to the membrane solid phase and Fmoc-norleucine, the reaction conversion rate was 3 to 4%. there were.
- the conditions described in the method for synthesizing peptides containing N-substituted amino acids (Patent Document 2) using diisopropylcarbodiimide (DIC) and 1-hydroxy-7-azabenzotriazole (HOAt) were used as reference.
- the reaction conversion rate was 50-64%.
- One aspect of the present invention is to improve the reaction conversion rate in a peptide synthesis method, particularly in the condensation reaction step.
- Another aspect of the present invention is to provide a method for efficiently producing a highly pure peptide compound using amidation conditions that avoid crystal precipitation and enable application to automated synthesis. do.
- the method of the present invention is not limited to peptide array technology using a membrane as a stationary phase, but is also applicable to solid phase synthesis using a polymer resin (resin for solid phase synthesis) as a stationary phase.
- [A1] A method for producing a peptide compound by a solid phase method, comprising: a preparatory step of preparing a first amino acid having an amino group or a first peptide having an amino group supported on a solid phase; and a first amino acid or a first peptide and a protected amino group and/or a protected hydroxyl group; group, and a second amino acid having a carboxy group, or a second peptide having a protected amino group and/or a protected hydroxy group, and a carboxy group, at least one carbodiimide represented by the following general formula (A).
- [A2] The method according to [A1], wherein R A is C 4 -C 10 secondary alkyl.
- [A2-1] The method according to [A1], wherein R A is C 4 -C 8 secondary alkyl.
- [A2-2] The method according to [A1], wherein R A is C 4 to C 8 secondary or tertiary alkyl having an asymmetric carbon.
- [A2-3] The method according to [A1], wherein R A is C 4 -C 8 secondary alkyl having an asymmetric carbon.
- [A2-4] The method according to [A1], wherein R A is C 4 -C 6 secondary alkyl having an asymmetric carbon.
- [A2-5] The method according to [A1], wherein R A is 1-methylheptyl, 1-methylbutyl, 1-ethylpropyl or sec-butyl.
- [A2-6] The method according to [A1], wherein R A is sec-butyl.
- R B is C 3 -C 10 secondary or tertiary alkyl, C 6 -C 10 aryl or C 7 -C 14 arylalkyl, and each group in R B is halogen, C 1 -C according to [ A1] or [A2], optionally substituted by one or more groups independently selected from 6-alkoxy, di-C 1 -C 6- alkylamino, or 4- to 8-membered cyclic amino Method.
- [A3-1] The method according to [A1] or [A2], wherein R B is C 3 to C 10 secondary or tertiary alkyl.
- [A3-2] The method according to [A1] or [A2], wherein R B is C 3 to C 10 secondary or tertiary alkyl, or C 7 to C 14 arylalkyl.
- [A3-3] The method according to [A1] or [A2], wherein R B is C 3 to C 10 secondary alkyl or C 7 to C 10 arylalkyl.
- [A3-4] The method according to [A1] or [A2], wherein R B is C 3 -C 6 secondary alkyl.
- [A3-5] The method according to [A1] or [A2], wherein R B is 1-methylbenzyl, 1-methylheptyl, 1-methylbutyl, 1-ethylpropyl or sec-butyl.
- [A3-6] The method according to [A1] or [A2], wherein R B is sec-butyl.
- R A is C 4 -C 8 secondary or tertiary alkyl
- R B is C 4 -C 10 secondary or tertiary alkyl, or C 7 -C 14 arylalkyl, The method described in [A1].
- R A is C 4 - C 8 secondary alkyl
- R B is C 4 - C 10 secondary alkyl, or C 7 - C 14 arylalkyl, according to [A1] Method.
- R A is C 4 - C 6 secondary alkyl
- R B is C 4 - C 8 secondary alkyl, or C 7 - C 10 arylalkyl, according to [A1] Method.
- R A is a C 4 to C 8 secondary or tertiary alkyl having an asymmetric carbon
- R B is a C 3 to C 10 secondary or tertiary alkyl, [A1] Method described.
- R A is C 4 -C 8 secondary alkyl having an asymmetric carbon
- R B is C 4 -C 10 secondary alkyl, or C 7 -C 14 arylalkyl, [ A1].
- R A is C 4 -C 8 secondary alkyl having an asymmetric carbon
- R B is C 4 -C 10 secondary alkyl, or C 7 -C 10 arylalkyl, [ A1].
- R A is C 4 -C 6 secondary alkyl having an asymmetric carbon
- R B is C 4 -C 8 secondary alkyl, or C 7 -C 10 arylalkyl, [ A1].
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'-(1 -Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), N,N'-bis(1-ethylpropyl)methanediimine (SS29), and N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30), the method according to any one of [A1] to [A5].
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'- (1-Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), or N'-(1-ethylpropyl)-N-(1 -Methylbutyl)methanediimine (SS30).
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N'- (1-Methylheptyl)-N-sec-butyl-me
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'- (1-Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), or N'-(1-ethylpropyl)-N-(1 -Methylbutyl)methanediimine (SS30), the method according to any one of [A1] to [A5].
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N'- (1-Methy
- [A6-3] The method according to any one of [A1] to [A5], wherein the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC).
- DsBC N,N'-di-sec-butylcarbodiimide
- [A6-4] The method according to any one of [A1] to [A5], wherein the carbodiimide condensing agent is N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26).
- [A6-5] The method according to any one of [A1] to [A5], wherein the carbodiimide condensing agent is N'-(1-methylheptyl)-N-sec-butyl-methanediimine (SS27).
- the additive is 1-hydroxy-7-azabenzotriazole (HOAt), 1-hydroxybenzotriazole (HOBt), 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzo From triazine (HOOBt), ethyl cyano(hydroxyimino)acetate (Oxyma), and 5-(hydroxyimino)-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione (Oxyma B) The method according to any one of [A1] to [A6], which is at least one selected from the group consisting of: [A8] The method according to any one of [A1] to [A6], wherein the additive is at least one selected from the group consisting of HOAt, HOOBt, and Oxyma.
- the condensation step is performed in a solvent, and the concentration of the carbodiimide condensing agent in the solvent is 4.0 mol/L or less, 3.0 mol/L or less, 2.0 mol/L or less, or 1.0 mol/L.
- the condensation step is performed in a solvent, and the concentration of the carbodiimide condensing agent in the solvent is 0.4 to 4.0 mol/L, 0.5 to 3.0 mol/L, 0.6 to 2.0 mol. /L, or 0.7 to 1.0 mol/L, the manufacturing method according to any one of [A1] to [A11].
- [A13] The production method according to any one of [A1] to [A11], wherein the condensation step is performed in a solvent, and the concentration of the carbodiimide condensing agent in the solvent is 0.7 to 1.0 mol/L. .
- [A14] The production method according to any one of [A1] to [A13], wherein the solid phase is a membrane or a resin for solid phase synthesis.
- [A15] The production method according to any one of [A1] to [A13], wherein the solid phase is a membrane.
- [A16] The method according to [A15], wherein the membrane is a cellulose membrane, a polypropylene membrane, or a polyaminoethylmethacrylamide membrane.
- the method described in. [A21-1] The method according to any one of [A1] to [A20], wherein the solid phase and the first amino acid or the first peptide are bonded via a photocleavable site.
- [A21-3] The method according to any one of [A1] to [A20], wherein the solid phase and the first amino acid or the first peptide are bonded via an acid-labile site.
- [A22] The method according to [A21-1], wherein the photocleavable site has a nitroberatryloxycarbonyl residue or a coumarin residue.
- [A22-1] The method according to [A21-1], wherein the photocleavable site is a nitroberatryloxycarbonyl residue.
- the acid labile site is a trityl ester structure, a chlorotrityl ester structure, an alkoxybenzyl ether structure, a trialkoxybenzylaminocarbonyl structure, a dialkoxyphenyl-alkoxyphenylmethylaminocarbonyl structure, or an alkoxyxanthene-9-ylaminocarbonyl structure
- the method according to [A21-3] having the structure.
- [A23-1] The method according to [A21-3], wherein the acid-labile site has a chlorotrityl ester structure.
- [A24] In the condensation step, 1.0 equivalent or more, 1.1 equivalent or more, or 1.2 equivalent or more of a carbodiimide condensing agent is used with respect to the second amino acid or second peptide, [A1] The method according to any one of ⁇ [A23]. [A25] In the condensation step, 5.0 equivalents or less, 4.0 equivalents or less, 3.0 equivalents or less, 2.0 equivalents or less, or 1.5 equivalents with respect to the second amino acid or second peptide The method according to any one of [A1] to [A24], using the following carbodiimide condensing agent. [A26] In the condensation step, 1.0 to 5.0 equivalents, 1.1 to 4.0 equivalents, 1.1 to 3.0 equivalents, 1.
- [A31] The method according to any one of [A1] to [A29], wherein in the condensation step, 0.3 to 0.7 equivalents of the additive are used with respect to the second amino acid or the second peptide.
- [A32] The method according to any one of [A1] to [A31], wherein the first amino acid or the N-terminal amino acid of the first peptide is a non-natural amino acid.
- the first amino acid or the N-terminal amino acid of the first peptide is an ⁇ , ⁇ -disubstituted amino acid, a ⁇ -branched amino acid, or an N-alkylamino acid (however, the alkyl in the N-alkylamino acid is a C 3 -C6 cycloalkyl, C2 - C6 alkenyl, C2 - C6 alkynyl, or C6 - C10 aryl) , [A1] to [A32].
- the first amino acid or the N-terminal amino acid of the first peptide is an N-alkyl amino acid in which the alkyl has 1 to 8 carbon atoms (however, the alkyl is halogen, cyano, C 3 to C 6 cyclo [A1] optionally substituted by one or more groups independently selected from alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, or C 6 -C 10 aryl), The method according to any one of ⁇ [A32].
- the first amino acid or the N-terminal amino acid of the first peptide is an N-alkylamino acid, an N-alkylamino acid whose alkyl has 1 to 8 carbon atoms, and an alkyl having 1 to 6 carbon atoms.
- [A36] The method according to any one of [A1] to [A32], wherein the first amino acid or the N-terminal amino acid of the first peptide is an N-methyl amino acid.
- [A37] The method according to any one of [A1] to [A36], wherein the second amino acid or the C-terminal amino acid of the second peptide is a non-natural amino acid.
- [A38] Any of [A1] to [A37], wherein the second amino acid or the C-terminal amino acid of the second peptide is an ⁇ , ⁇ -disubstituted amino acid, a ⁇ -branched amino acid, or an N-alkyl amino acid. Method described in Crab.
- [A39] The method according to any one of [A1] to [A38], wherein the protecting group in the protected amino group is a group represented by the following formula (1); (wherein R 1 -R 8 are independently selected from the group consisting of hydrogen, C 1 -C 8 alkyl, C 1 -C 8 fluoroalkyl, halogen, sulfo, and trimethylsilyl, and R 9 -R 10 are independently hydrogen or methyl).
- the protecting group in the protected amino group is a 9-fluorenylmethyloxycarbonyl (Fmoc) group, Fmoc (2,7tb) group, Fmoc (1Me) group, Fmoc (2F) group, Fmoc (2,7Br) group group, mio-Fmoc group, dio-Fmoc group, tdf-Fmoc group, Fmoc (2TMS) group, Fmoc (2so3h) group, sm-Fmoc group, or rm-Fmoc group, [A1] to [A38] Any method described.
- Fmoc 9-fluorenylmethyloxycarbonyl
- [A41] The method according to any one of [A1] to [A38], wherein the protecting group in the protected amino group is an Fmoc group.
- [A42] The method according to any one of [A1] to [A41], wherein the condensation step is performed in a solvent.
- the solvent includes at least one selected from the group consisting of an amide solvent, a urea solvent, an ether solvent, a halogen solvent, a nitrile solvent, and a benzene solvent. .
- the solvent is an amide solvent.
- Amide solvents include N,N-dimethylformamide (DMF), N-methyl-2-pyrrolidone (NMP), dimethylacetamide (DMA), N-ethyl-2-pyrrolidone (NEP), and N-butyl-
- the method according to [A44] which is selected from the group consisting of 2-pyrrolidone (NBP) and formamide.
- NBP 2-pyrrolidone
- the method according to [A43], wherein the solvent is a urea solvent.
- the urea solvent is selected from the group consisting of 1,3-dimethyl-2-imidazolidinone (DMI) and N,N'-dimethylpropylene urea (DMPU). .
- the ether solvent is selected from the group consisting of tetrahydrofuran, 2-methyltetrahydrofuran, and 4-methyltetrahydropyran.
- the solvent is a halogen solvent.
- the halogenated solvent is selected from the group consisting of dichloromethane and 1,2-dichloroethane.
- the method according to [A43], wherein the solvent is a nitrile solvent.
- the condensation step is performed at 0°C to 100°C, 10°C to 80°C, 10°C to 60°C, 10°C to 50°C, 10°C to 40°C, 10°C to 35°C, 15°C to 60°C, 20°C
- [A58] The method according to any one of [A1] to [A57], wherein the condensation step is repeated two or more times.
- [A59] The method according to any one of [A1] to [A57], wherein the condensation step is repeated twice.
- [A60] After the condensation step, [A1 ] to [A59].
- [A61] The method according to [A60], further comprising a washing step of washing the solid phase between the condensation step and the deprotection step.
- [A62] Repeat the condensation step and deprotection step multiple times (however, the multiple second amino acids and/or second peptides used in the multiple condensation steps may be the same or different, respectively) ), [A60] or the method described in [A61].
- [A63] Use of the carbodiimide condensing agent represented by the above formula (A) in the method according to any one of [A1] to [A62].
- [A64] Use of DsBC in the method according to any one of [A1] to [A62].
- R A and R B in the above general formula (A) it becomes possible to maintain a high concentration of active ester in the reaction system for a long time, and it is possible to further improve the reaction conversion rate in the condensation reaction process.
- [A4] to [A4-2] are preferred from the viewpoint of possible amidation, and [A5] is preferred from the viewpoint of efficient amidation even in automatic synthesis by avoiding precipitation of urea derived from carbodiimide to a high degree even at high concentrations. ] to [A5-3] are preferred.
- [A1] to [A64] methods for producing peptide compounds using solid phase methods have been described, but these production methods can also be applied to liquid phase methods. That is, one aspect of the present invention provides the following [A1'].
- [A1′] may include features other than the solid phase among [A2] to [A64].
- [A1′] A method for producing a peptide compound by a liquid phase method, comprising: A preparation step of preparing a first amino acid having an amino group or a first peptide having an amino group; and a first amino acid or a first peptide having a protected amino group and/or a protected hydroxy group, and a carboxy group.
- a second amino acid, a protected amino group and/or a protected hydroxyl group, and a second peptide having a carboxy group are combined with at least one carbodiimide condensing agent represented by the above general formula (A) and an additive.
- the method comprises a condensation step of condensing in the presence of According to this method, the desired peptide compound can be obtained at a high reaction conversion rate.
- the present invention also provides the following [B1] to [B63].
- [B1] A method for producing a peptide compound by a solid phase method, comprising: a preparatory step of providing a first amino acid having an N-alkylamino group or a first peptide having an N-alkylamino group at the N-terminus supported on a solid phase; and a first amino acid or a first peptide.
- R A' is C 3 -C 10 alkyl, C 6 -C 10 aryl or C 7 -C 14 arylalkyl
- R B' is C 1 -C 10 alkyl, C 6 -C 10 aryl or C 7 -C 14 arylalkyl
- each group in R A' and R B' is independently from halogen, C 1 -C 6 alkoxy, diC 1 -C 6 alkylamino, or 4- to 8-membered cyclic amino.
- R A' may be substituted with one or more groups selected as follows.However, the total number of carbon atoms in R A' is 4 or more.)
- R A' is C 4 -C 10 alkyl, C 4 -C 6 alkyl, or C 4 alkyl.
- [B3] The method according to [B1] or [B2], wherein R B' is C 1 -C 10 alkyl, C 6 -C 10 aryl or C 7 -C 14 arylalkyl.
- [B3-1] The method according to [B1] or [B2], wherein R B' is C 1 to C 10 alkyl.
- [B3-2] The method according to [B1] or [B2], wherein R B' is C 2 to C 6 alkyl.
- [B3-3] The method according to [B1] or [B2], wherein R B' is C 4 alkyl.
- the carbodiimide condensing agent is DsBC, 1-tert-butyl-3-ethylcarbodiimide (tBEC), di-tert-butylcarbodiimide (DtBC), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI).
- N,N'-di-sec-butylcarbodiimide DsBC
- N'-(1-phenylethyl)-N-sec-butyl-methanediimine SS26
- N'-(1-methylheptyl)-N -sec-butyl-methanediimine SS27
- N,N'-bis(1-methylbutyl)methanediimine SS28
- N,N'-bis(1-ethylpropyl)methanediimine SS29
- N'-(1- ethylpropyl)-N-(1-methylbutyl)methanediimine SS30
- the carbodiimide condensing agent is DsBC, 1-tert-butyl-3-ethylcarbodiimide (tBEC), di-tert-butylcarbodiimide (DtBC), and 1-(3-dimethylaminopropyl)-3-ethyl
- tBEC 1-tert-butyl-3-ethylcarbodiimide
- DtBC di-tert-butylcarbodiimide
- EDCI 1-(3-dimethylaminopropyl)-3-ethyl
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'-(1 -Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), N,N'-bis(1-ethylpropyl)methanediimine (SS29), and N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30), the method according to any one of [B1] to [B3].
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'- (1-Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), or N'-(1-ethylpropyl)-N-(1 -Methylbutyl)methanediimine (SS30), the method according to any one of [B1] to [B3].
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N'- (1-Methy
- the carbodiimide condensing agent is N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'- (1-Methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), or N'-(1-ethylpropyl)-N-(1 -Methylbutyl)methanediimine (SS30), the method according to any one of [B1] to [B3].
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N'- (1-Methy
- [B5-3] The method according to any one of [B1] to [B3], wherein the carbodiimide condensing agent is DsBC.
- [B5-4] The method according to any one of [B1] to [B3], wherein the carbodiimide condensing agent is N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26).
- [B5-5] The method according to any one of [B1] to [B3], wherein the carbodiimide condensing agent is N'-(1-methylheptyl)-N-sec-butyl-methanediimine (SS27).
- [B6] The method according to any one of [B1] to [B5], wherein the additive is at least one selected from the group consisting of HOAt, HOBt, HOOBt, and Oxyma.
- the additive is at least one selected from the group consisting of HOAt, HOOBt, and Oxyma.
- [B8] The method according to any one of [B1] to [B5], wherein the additive is HOAt, HOOBt, or Oxyma.
- the concentration of the carbodiimide condensing agent in the solvent is 0.5 to 3.0 mol/L, 0.6 to 2.0 mol/L, or 0.7 to 1.0 mol/L. , [B1] to [B10].
- the solid phase is a membrane or a resin for solid phase synthesis.
- [B14] The production method according to any one of [B1] to [B12], wherein the solid phase is a membrane.
- the membrane is a cellulose membrane, a polypropylene membrane, or a polyaminoethylmethacrylamide membrane.
- the membrane is a cellulose membrane.
- the solid phase is a resin for solid phase synthesis.
- [B20-1] The method according to any one of [B1] to [B19], wherein the solid phase and the first amino acid or the first peptide are supported via a photocleavable site.
- [B20-2] The method according to any one of [B1] to [B19], wherein the solid phase and the first amino acid or the first peptide are bonded via a disulfide bond.
- [B20-3] The method according to any one of [B1] to [B19], wherein the solid phase and the first amino acid or the first peptide are bonded via an acid-labile site.
- [B21] The method according to [B20-1], wherein the photocleavable site has a nitroberatryloxycarbonyl residue or a coumarin residue.
- the acid labile moiety is a trityl ester structure, a chlorotrityl ester structure, an alkoxybenzyl ether structure, a trialkoxybenzylaminocarbonyl structure, a dialkoxyphenyl-alkoxyphenylmethylaminocarbonyl structure, or an alkoxyxanthene-9-ylaminocarbonyl structure.
- the method according to [B20-3] having the structure.
- [B22-1] The method according to [B20-3], wherein the acid-labile site has a chlorotrityl ester structure.
- [B23] In the condensation step, 1.0 equivalent or more, 1.1 equivalent or more, or 1.2 equivalent or more of a carbodiimide condensing agent is used with respect to the second amino acid or second peptide, [B1] The method according to any one of ⁇ [B22]. [B24] In the condensation step, 5.0 equivalents or less, 4.0 equivalents or less, 3.0 equivalents or less, 2.0 equivalents or less, or 1.5 equivalents with respect to the second amino acid or second peptide The method according to any one of [B1] to [B23], using the following carbodiimide condensing agent. [B25] In the condensation step, 1.0 to 5.0 equivalents, 1.1 to 4.0 equivalents, 1.1 to 3.0 equivalents, 1.
- [B31] The method according to any one of [B1] to [B30], wherein the first amino acid or the N-terminal amino acid of the first peptide is a non-natural amino acid.
- the alkyl in the N-alkylamino group of the first amino acid, or the alkyl in the N-alkylamino group of the N-terminal amino acid of the first peptide is C 1 to C 10 alkyl, C 1 to C 6 alkyl, or C 1 -C 3 alkyl, where alkyl is halogen, cyano, C 1 -C 6 alkoxy, C 3 -C 6 cycloalkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, or optionally substituted with one or more groups independently selected from C 6 -C 10 aryl), the method according to any one of [B1] to [B31].
- the first amino acid or the N-terminal amino acid of the first peptide is an N-alkyl amino acid in which the alkyl has 1 to 8 carbon atoms (however, the alkyl is halogen, cyano, C 1 to C 6 alkoxy , C3 - C6 cycloalkyl, C2 - C6 alkenyl, C2 - C6 alkynyl, or C6 - C10 aryl. ), the method according to any one of [B1] to [B32].
- the first amino acid or the N-terminal amino acid of the first peptide is an N-alkylamino acid, an N-alkylamino acid whose alkyl has 1 to 8 carbon atoms, an N-alkylamino acid whose alkyl has 1 to 6 carbon atoms,
- [B38] The method according to any one of [B1] to [B37], wherein the protecting group in the protected amino group is a group represented by the following formula (1); (wherein R 1 -R 8 are independently selected from the group consisting of hydrogen, C 1 -C 8 alkyl, C 1 -C 8 fluoroalkyl, halogen, sulfo, and trimethylsilyl, and R 9 -R 10 are independently hydrogen or methyl).
- the protecting group in the protected amino group is Fmoc group, Fmoc (2,7tb) group, Fmoc (1Me) group, Fmoc (2F) group, Fmoc (2,7Br) group, mio-Fmoc group, dio-Fmoc group. group, tdf-Fmoc group, Fmoc (2TMS) group, Fmoc (2so3h) group, sm-Fmoc group, or rm-Fmoc group, the method according to any one of [B1] to [B37]. [B40] The method according to any one of [B1] to [B37], wherein the protecting group in the protected amino group is an Fmoc group.
- [B41] The method according to any one of [B1] to [B40], wherein the condensation step is performed in a solvent.
- the solvent includes at least one selected from the group consisting of an amide solvent, a urea solvent, an ether solvent, a halogen solvent, a nitrile solvent, and a benzene solvent.
- the solvent is an amide solvent.
- the amide solvent is selected from the group consisting of DMF, NMP, DMA, NEP, NBP, and formamide.
- the solvent is a nitrile solvent.
- the nitrile solvent is acetonitrile.
- the solvent is a benzene-based solvent.
- the benzene-based solvent is selected from the group consisting of benzene, toluene, and xylene.
- the condensation step is performed at 0°C to 100°C, 10°C to 80°C, 10°C to 60°C, 10°C to 50°C, 10°C to 40°C, 10°C to 35°C, 15°C to 60°C, 20°C
- [B58] The method according to any one of [B1] to [B56], wherein the condensation step is repeated twice. [B59] After the condensation step, [B1 ] to [B58]. [B60] The method according to [B59], further comprising a washing step of washing the solid phase between the condensation step and the deprotection step. [B61] Repeat the condensation step and deprotection step multiple times (however, the multiple second amino acids and/or second peptides used in the multiple condensation steps may be the same or different, respectively) ), [B59] or the method described in [B60]. [B62] Use of a carbodiimide condensing agent represented by formula (A') in the method according to any one of [B1] to [B61].
- [B63] Use of DsBC in the method according to any one of [B1] to [B61].
- [B1] to [B63] methods for producing peptide compounds using solid phase methods have been described, but these production methods can also be applied to liquid phase methods. That is, one aspect of the present invention provides the following [B1'].
- [B1'] may include features other than the solid phase among [B2] to [B63].
- a method for producing a peptide compound by a liquid phase method comprising: a preparatory step of providing a first amino acid having an N-alkylamino group or a first peptide having an N-alkylamino group at the N-terminus; and a first amino acid or a first peptide with a protected amino group and/or or a second amino acid having a protected hydroxy group and a carboxyl group, or a second peptide having a protected amino group and/or a protected hydroxy group and a carboxyl group, at least
- the method described above comprising a condensation step in which condensation is performed in a solvent in the presence of one type of carbodiimide condensing agent and an additive, and the concentration of the carbodiimide condensing agent in the solvent is 0.4 to 4.0 mol/L. .
- the desired peptide compound can be obtained at a high reaction conversion rate.
- the present invention also provides the following [C1] to [C16].
- [C1] A method for producing a peptide compound supported on a membrane, comprising the method according to any one of [A1] to [A64] or [B1] to [B63].
- [C2] The method according to [C1], wherein the peptide compound supported on the membrane has two or more constituent units derived from N-alkylamino acids.
- [C3] The method according to [C1] or [C2], wherein the peptide compound supported on the membrane has 3 or more, 4 or more, 5 or more, 6 or more, or 7 or more constituent units derived from N-alkyl amino acids.
- [C4] The method according to any one of [C1] to [C3], wherein the peptide compound supported on the membrane has 7 or more constituent units derived from N-alkylamino acids.
- [C5] The method according to any one of [C1] to [C4], wherein the peptide compound supported on the membrane has a total of 7 or more, 8 or more, 9 or more, or 10 or more constitutional units derived from amino acids.
- [C6] The method according to any one of [C1] to [C5], wherein the peptide compound has a total of 10 or more constitutional units derived from amino acids.
- the method described in. [C8] The method according to any one of [C1] to [C7], wherein the peptide compound has a total of 15 or less constitutional units derived from amino acids.
- [C9] A method for producing a peptide library supported on a membrane, the method comprising the step of obtaining 10 or more types of peptide compounds supported on a membrane by the method according to any one of [C1] to [C8].
- a method for producing a peptide library supported on a membrane comprising the step of obtaining a compound.
- [C11] A method for producing a peptide library supported on a membrane, the method comprising the step of obtaining 384 or more types of peptide compounds supported on a membrane by the method according to any one of [C1] to [C8].
- [C13] The method according to any one of [C1] to [C12], further comprising the step of cutting out the peptide compound from the peptide compound supported on the membrane.
- [C14] The method according to [C13], wherein the peptide compound is excised by light irradiation.
- [C15] A method for producing a cyclic peptide or a cyclic peptide library, comprising the step of cyclizing a peptide compound excised by the method described in [C13] or [C14].
- [C16] The method according to [C15], which uses an automatic synthesizer.
- the present invention also provides the following [D1] to [D6].
- [D1] A peptide compound bonded to a membrane via a linker, the peptide compound having two or more constituent units derived from N-alkyl amino acids.
- [D2] The peptide compound according to [D1], wherein the peptide compound has 3 or more, 4 or more, 5 or more, 6 or more, or 7 or more constitutional units derived from N-alkyl amino acids.
- [D3] The peptide compound according to [D1] or [D2], wherein the peptide compound has a total of 7 or more, 8 or more, 9 or more, 10 or more, or 11 or more constitutional units derived from amino acids.
- [D5] A peptide library comprising 10 or more types of peptide compounds bound to a membrane via a linker, according to any one of [D1] to [D4].
- the present invention also provides the following [E1] to [E3].
- [E1] A method for screening compounds that bind to a target molecule, comprising: (1) Synthesizing a peptide library or a cyclic peptide library by the method described in any one of [C9] to [C16]; (2) contacting the peptide library or cyclic peptide library with a target molecule; (3) The method described above, comprising selecting a peptide compound that binds to the target molecule.
- [E2] The method according to [E1], wherein the target molecule is a protein, nucleic acid, polypeptide, or sugar chain.
- the present invention also provides the following [F1] to [F5].
- [F1] A precipitation inhibitor in peptide synthesis, including DsBC.
- [F2] A precipitation inhibitor in peptide synthesis, containing N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26).
- [F3] A precipitation inhibitor in peptide synthesis, containing N'-(1-methylheptyl)-N-sec-butyl-methanediimine (SS27).
- [F4] A precipitation inhibitor in peptide synthesis, containing N,N'-bis(1-methylbutyl)methanediimine (SS28).
- [F5] A precipitation inhibitor in peptide synthesis, containing N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30).
- the present invention also provides the following [G1] to [G4].
- G4 N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30)
- the present invention also provides the following [H1] to [H7].
- [H1] N,N'-di-sec-butylcarbodiimide (DsBC), N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'-(1-methylheptyl)- N-sec-butyl-methanediimine (SS27), N,N'-bis(1-methylbutyl)methanediimine (SS28), N,N'-bis(1-ethylpropyl)methanediimine (SS29), or N'-(1 -Ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30) as a condensing agent to form an amide bond.
- DsBC N,N'-di-sec-butylcarbodiimide
- SS26 N'-(1-phenyleth
- [H2] A method for producing a compound, comprising a step of forming an amide bond using N,N'-di-sec-butylcarbodiimide (DsBC) as a condensing agent.
- DsBC N,N'-di-sec-butylcarbodiimide
- [H3] A method for producing a compound, comprising a step of forming an amide bond using N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26) as a condensing agent.
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N'-(1-methylheptyl)-N-sec-butyl-methanediimine
- [H5] A method for producing a compound, comprising a step of forming an amide bond using N,N'-bis(1-methylbutyl)methanediimine (SS28) as a condensing agent.
- SS28 N,N'-bis(1-methylbutyl)methanediimine
- SS30 N,N'-bis(1-ethylpropyl)methanediimine
- amide A method for producing a compound, comprising the step of forming a bond.
- [H7] A method for producing a compound, comprising a step of forming an amide bond using N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30) as a condensing agent.
- SS30 N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine
- [H8] The production method according to any one of [H1] to [H7], wherein the step of forming the amide bond is performed in a solid phase or a liquid phase.
- the numbers cited in the dependent claims include branch numbers of the numbers unless otherwise stated.
- [A2] cited in a dependent claim indicates that it includes [A2] and its branch numbers [A2-1] to [A2-6]. The same applies to other numbering.
- the reaction conversion rate can be improved in the peptide solid phase synthesis method, particularly in the condensation reaction step.
- high-purity peptides can be used as amidation conditions to avoid crystal precipitation in the peptide solid-phase synthesis method, particularly in the condensation reaction step, thereby enabling application to automatic synthesis.
- a method for efficiently producing a compound can be provided.
- one or more means a number of one or more.
- substituents of a group the term means one up to the maximum number of substituents allowed by the group.
- One or more specifically includes, for example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and/or a larger number.
- ⁇ indicating a numerical range includes values at both ends thereof; for example, "A to B” means a numerical range that is greater than or equal to A and less than or equal to B.
- lower limit includes both “more than” and “more than”
- upper limit includes both “less than” and “less than”.
- the term "about" when used in conjunction with a numerical value means a value range of +10% and -10% of that numerical value.
- A, B, and/or C includes the following seven variations; (i) A, (ii) B, (iii) C, (iv) A and B, (v) A and C, (vi) B and C, (vii) A, B, and C.
- room temperature means a temperature of about 20°C to about 25°C.
- halogen examples include F, Cl, Br, or I.
- alkyl is a monovalent group derived from an aliphatic hydrocarbon by removing one arbitrary hydrogen atom, and has a heteroatom (atom other than carbon and hydrogen atoms) in the skeleton. ) or have a subset of hydrocarbyl or hydrocarbon group structures that do not contain unsaturated carbon-carbon bonds and contain hydrogen and carbon atoms.
- Alkyl includes not only linear ones but also branched ones. Specifically, the alkyl is an alkyl having 1 to 20 carbon atoms (C 1 to C 20 , hereinafter "C p to C q " means the number of carbon atoms is p to q), Preferably C 1 -C 10 alkyl, more preferably C 1 -C 6 alkyl.
- alkyl examples include methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, t-butyl, isobutyl (2-methylpropyl), n-pentyl, s-pentyl (1- methylbutyl), t-pentyl (1,1-dimethylpropyl), neopentyl (2,2-dimethylpropyl), isopentyl (3-methylbutyl), 3-pentyl (1-ethylpropyl), 1,2-dimethylpropyl, 2 -Methylbutyl, n-hexyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1,1,2,2-tetramethylpropyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl , 1,3-dimethylbutyl, 2,2-dimethylbutyl, 2,3-dimethylbutyl, 3,
- C 3 - C 10 secondary alkyl examples include i-propyl, s-butyl, s-pentyl, 3-pentyl, 1,2-dimethylpropyl, 1,2,2-trimethylpropyl, 1 , 2-dimethylbutyl, 1,3-dimethylbutyl, 1-ethylbutyl and the like.
- Specific examples of "C 4 to C 10 secondary alkyl having an asymmetric carbon” include s-butyl, s-pentyl, 1,2-dimethylpropyl, 1,2-dimethylbutyl, 1,3-dimethylbutyl , 1-ethylbutyl and the like.
- C 4 - C 10 tertiary alkyl examples include t-butyl, t-pentyl, 1,1,2-trimethylpropyl, 1,1,2,2-tetramethylpropyl, 1,1- Examples include dimethylbutyl, 1-ethyl-1-methylbutyl, and the like.
- Specific examples of "C 4 -C 10 tertiary alkyl having an asymmetric carbon” include 1-ethyl-1-methylbutyl and the like.
- alkenyl is a monovalent group having at least one double bond (two adjacent SP2 carbon atoms). Depending on the configuration of the double bond and substituents (if present), the geometry of the double bond can be Entadel (E) or Entumble (Z), cis or trans configuration. Alkenyl includes not only straight-chained alkenyl but also branched alkenyl. Preferred alkenyls include C 2 -C 10 alkenyl, more preferably C 2 -C 6 alkenyl.
- vinyl, allyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl (including cis and trans), 3-butenyl, pentenyl, 3-methyl-2-butenyl, hexenyl, etc. can be mentioned.
- alkynyl is a monovalent group having at least one triple bond (two adjacent SP carbon atoms). Alkynyl includes not only straight chain but also branched chain. Preferred alkynyl is C 2 -C 10 alkynyl, more preferably C 2 -C 6 alkynyl.
- ethynyl 1-propynyl, propargyl, 3-butynyl, pentynyl, hexynyl, 3-phenyl-2-propynyl, 3-(2'-fluorophenyl)-2-propynyl, 2-hydroxy-2 -propynyl, 3-(3-fluorophenyl)-2-propynyl, 3-methyl-(5-phenyl)-4-pentynyl, and the like.
- cycloalkyl means a saturated or partially saturated cyclic monovalent aliphatic hydrocarbon group, and includes a monocyclic ring, a bicyclo ring, and a spiro ring.
- Preferred examples of cycloalkyl include C 3 -C 8 cycloalkyl. Specific examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, bicyclo[2.2.1]heptyl, spiro[3.3]heptyl, and the like.
- aryl means a monovalent aromatic hydrocarbon ring and an aromatic hydrocarbon ring group.
- Preferred examples of aryl include C 6 to C 10 aryl. Specific examples include phenyl, naphthyl (eg, 1-naphthyl, 2-naphthyl), and the like.
- heteroaryl means an aromatic cyclic monovalent group containing 1 to 5 heteroatoms in addition to carbon atoms, and an aromatic heterocyclic group.
- the ring may be a monocyclic ring, a fused ring with another ring, or a partially saturated ring.
- the number of atoms constituting the ring of heteroaryl is preferably 5 to 10 (5 to 10 membered heteroaryl), more preferably 5 to 7 (5 to 7 membered heteroaryl).
- heteroaryl examples include furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiadiazolyl, triazolyl, tetrazolyl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, triazinyl, benzofuranyl, benzothienyl.
- benzothiadiazolyl benzothiazolyl, benzoxazolyl, benzoxadiazolyl, benzimidazolyl, benzotriazolyl, indolyl, isoindolyl, indazolyl, azaindolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl, quinoxalinyl, benzodioxolyl, indolizinyl, Examples include imidazopyridyl, pyrazolopyridyl, imidazopyridyl, triazolopyridyl, pyrrolopyrazinyl, furopyridyl, and the like.
- arylalkyl (aralkyl) means a group in which at least one hydrogen atom of "alkyl” defined above is substituted with “aryl” defined above.
- arylalkyl C 7 -C 14 arylalkyl is preferred, and C 7 -C 10 arylalkyl is more preferred.
- Specific examples of arylalkyl include benzyl, phenethyl, and 3-phenylpropyl.
- alkoxy means an oxy group to which "alkyl” as defined above is bonded.
- Preferred examples of alkoxy include C 1 to C 6 alkoxy.
- Specific examples of alkoxy include methoxy, ethoxy, 1-propoxy, 2-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy, pentyloxy, and 3-methylbutoxy.
- amino means -NH2 in a narrow sense and -NRR' in a broad sense, where R and R' are independently hydrogen, alkyl, alkenyl, alkynyl, cyclo selected from alkyl, heterocyclyl, aryl, or heteroaryl, or R and R' together with the nitrogen atom to which they are attached form a ring.
- R and R' are independently hydrogen, alkyl, alkenyl, alkynyl, cyclo selected from alkyl, heterocyclyl, aryl, or heteroaryl, or R and R' together with the nitrogen atom to which they are attached form a ring.
- Preferred examples of amino include -NH 2 , mono-C 1 -C 6 alkylamino, di-C 1 -C 6 alkylamino, and 4- to 8-membered cyclic amino.
- monoalkylamino means a group in which R is hydrogen and R' is “alkyl” as defined above among “amino” defined above.
- Preferable examples of monoalkylamino include mono-C 1 -C 6 alkylamino.
- Specific examples of monoalkylamino include methylamino, ethylamino, n-propylamino, i-propylamino, n-butylamino, s-butylamino, and t-butylamino.
- dialkylamino refers to a group of “amino” defined above, in which R and R' are independently “alkyl” defined above.
- dialkylamino includes di-C 1 -C 6 alkylamino.
- Specific examples of dialkylamino include dimethylamino and diethylamino.
- cyclic amino refers to a group in which R and R' form a ring together with the nitrogen atom to which they are bonded in "amino" defined above.
- Preferred examples of the cyclic amino include 4- to 8-membered cyclic aminos.
- Specific examples of the cyclic amino include 1-azetidyl, 1-pyrrolidyl, 1-piperidyl, 1-piperazyl, 4-morpholinyl, 3-oxazolidyl, 1,1-dioxidethiomorpholinyl-4-yl, 3 -oxa-8-azabicyclo[3.2.1]octan-8-yl and the like.
- the compound in the manufacturing methods described herein, if a defined group undergoes an undesired chemical transformation under the conditions of the performed method, the compound can be can be manufactured.
- the selection of the protecting group and the desorption operation can be carried out, for example, by the method described in “Greene's, “Protective Groups in Organic Synthesis” (5th edition, John Wiley & Sons 2014), and these can be carried out under the reaction conditions. It may be used as appropriate.
- the order of reaction steps such as substituent introduction can be changed as necessary.
- amino group protecting group includes carbamate type protecting group, amide type protecting group, arylsulfonamide type protecting group, alkylamine type protecting group, imide type protecting group, etc. .
- examples include methylidene.
- protected amino group means an amino group protected with any protecting group.
- the protected amino group includes, for example, an amino group protected with the above-mentioned amino protecting group.
- hydroxy group protecting group includes alkyl ether type protecting groups, aralkyl ether type protecting groups, silyl ether type protecting groups, carbonate type protecting groups, and the like.
- Specific examples of hydroxy protecting groups include methoxymethyl, benzyloxymethyl, tetrahydropyranyl, t-butyl, allyl, 2,2,2-trichloroethyl, benzyl, 4-methoxybenzyl, trimethylsilyl, triethylsilyl, and triisopropyl.
- Examples include silyl, t-butyldimethylsilyl, t-butyldiphenylsilyl, methoxycarbonyl, 9-fluorenylmethoxycarbonyl, and 2,2,2-trichloroethoxycarbonyl.
- protected hydroxy group means a hydroxy group protected with any protecting group.
- the protected hydroxy group includes, for example, a hydroxy group protected with the above-mentioned hydroxy protecting group.
- the "carboxy group protecting group” includes an alkyl ester type protecting group, a benzyl ester type protecting group, a substituted alkyl ester type protecting group, and the like.
- Specific examples of carboxyl protecting groups include methyl, ethyl, t-butyl, benzyl, trityl, cumyl, methoxytrityl, 2-(trimethylsilyl)ethyl, 2,2,2-trichloroethyl, allyl, etc. .
- protected carboxy group means a carboxy group protected with any protecting group.
- the protected carboxy group includes, for example, a carboxy group protected with the above-mentioned carboxyl protecting group.
- the "peptide” in this specification is not particularly limited as long as it is a peptide formed by amide bonding or ester bonding of natural amino acids and/or unnatural amino acids.
- the peptide preferably has 5 to 30 residues, more preferably 7 to 15 residues, and even more preferably 9 to 13 residues.
- Peptides may be linear or cyclic peptides.
- the "peptide compound” as used herein is not particularly limited as long as it is a peptide compound in which natural amino acids and/or unnatural amino acids are linked by an amide bond and some ester bonds, but preferably 5 to 30 residues, more preferably 5 to 30 residues, and more.
- a peptide compound preferably has 8 to 15 residues, more preferably 9 to 13 residues.
- the peptide compound synthesized in this embodiment preferably contains at least three N-substituted amino acids in one peptide, and more preferably contains at least five or more N-substituted amino acids. These N-substituted amino acids may be present continuously or discontinuously in the peptide compound.
- the peptide compound in this embodiment may be linear or cyclic, and cyclic peptide compounds are preferred.
- the peptide compound preferably has 5 to 30 residues, more preferably 8 to 15 residues, and even more preferably 9 to 13 residues.
- one peptide compound preferably contains at least three N-substituted amino acids, and more preferably contains at least five or more N-substituted amino acids. These N-substituted amino acids may be present continuously or discontinuously in the peptide compound.
- the peptide compound in this embodiment may be linear or cyclic, and cyclic peptide compounds are preferred.
- cyclic peptide compound is a cyclic peptide compound that can be obtained by bonding arbitrary groups of a linear peptide compound and cyclizing the compound.
- cyclization of cyclic peptide compounds include cyclization through carbon-nitrogen bonds such as amide bonds, cyclization through carbon-oxygen bonds such as ester bonds and ether bonds, and cyclization through carbon-sulfur bonds such as thioether bonds. It may be in any form, such as cyclization by carbon-carbon bond, or cyclization by constructing a heterocyclic ring. Among these, cyclization via covalent bonds such as amide bonds, carbon-sulfur bonds or carbon-carbon bonds is preferred.
- Cyclization using an amide bond is particularly preferred, and the position of the carboxy group or amino group used for cyclization may be on the main chain or on the side chain. More preferred is cyclization via an amide bond between a carboxy group on the side chain and an amino group on the main chain at the N-terminus.
- Cyclization of a peptidic compound means forming a cyclic portion containing four or more amino acid residues.
- the number of amino acids contained in the cyclic portion of the cyclic peptide compound herein is not particularly limited, but examples thereof include 4 to 20 residues, 5 to 15 residues, and 6 to 13 residues.
- Comprehensive Organic Transformations A Guide to Functional Group Preparations, 3rd Edition (written by R. C. Larock), or March's Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 7th Edition. , (authored by M. B. Smith, J. March), etc., by performing a bond-forming reaction within the molecule.
- a functional group conversion reaction can also be performed after the bond forming reaction.
- Bond formation reactions include C(O)-N bonds formed from carboxylic acids and amines, C-O-C bonds using oxygen atoms, C(O)-O bonds, C(S)-O bonds, and sulfur.
- C--C bond forming reactions using transition metals as catalysts such as Suzuki reaction, Heck reaction, and Sonogashira reaction.
- An oxidation reaction or a reduction reaction is exemplified as a functional group conversion reaction that is further performed after the bond-forming reaction.
- a reaction in which a sulfur atom is oxidized and converted into a sulfoxide group or a sulfone group is exemplified.
- a reduction reaction in which a triple bond or a double bond among carbon-carbon bonds is reduced and converted into a double bond or a single bond.
- a closed ring structure is formed by a peptide bond, but a covalent bond between the two amino acids is formed by the bond between the side chains of the two amino acids or between the side chain and the main chain. may be done.
- membrane is not particularly limited as long as it can be used to synthesize a peptide compound by a solid phase method.
- Specific examples of such membranes include cellulose membranes, polypropylene membranes, and polyaminoethylmethacrylamide membranes, with cellulose membranes being preferred.
- amino group-modified membrane refers to, for example, a cellulose membrane or a polypropylene membrane that has been chemically modified to have an amino group on its surface, and can be used for the synthesis of peptide compounds by a solid phase method.
- cellulose can be prepared using a known method (Preparation of a Cellulose Membrane for Spot Synthesis) described in Methods Mol. Biol., 2009, 570, 157-174. It can be prepared by attaching a carboxy group of ⁇ -alanine or the like to an ester bond to the hydroxyl group of the membrane.
- membranes that have already been modified with amino groups include Amino-PEG500-UC540 Sheets, and CelluSpots 384 frame with acid stable discs that have been further processed into a disc shape and attached to a frame by CEM (formerly Intavis). It can be obtained as a commercial product from companies such as Co., Ltd. Note that in this specification, “membrane disk” may also be referred to as “membrane.”
- the amount and rate of support on a solid phase including a membrane are not particularly limited as long as it can be used for synthesis of a peptide compound by a solid phase method. In some embodiments, it is possible to reduce loading and loading ratio when extending amino acids. There are no particular limitations on the method for appropriately reducing the amount and rate of support, such as mixing Fmoc-Photo-Linker and 4-phenoxybutyric acid in any ratio and elongating the mixture, and any method may be used.
- the "resin for solid phase synthesis” is not particularly limited as long as it can be used for the synthesis of peptide compounds by solid phase method.
- Specific examples of such resins for solid phase synthesis include CTC resin, NovaSyn TGT resin (TGT resin), Wang resin, SASRIN resin, trityl chloride resin (Trt resin), and 4-methyltrityl chloride resin (Mtt resin). resin) and 4-methoxytrityl chloride resin (Mmt resin), which can be removed under acidic conditions.
- the resin can be appropriately selected depending on the functional group of the amino acid used.
- a carboxy group main chain carboxy group or side chain carboxy group typified by Asp or Glu
- a hydroxy group on an aromatic ring phenol group typified by Tyr
- trityl chloride resin Trt resin
- CTC resin 2-chlorotrityl chloride resin
- an aliphatic hydroxy group an aliphatic alcohol group represented by Ser or Thr
- Trt resin 2-chlorotrityl chloride resin
- Mtt resin 4-methyltrityl chloride resin
- resin may be described as resin.
- the type of polymer constituting the resin is also not particularly limited. In the case of a resin composed of polystyrene, either 100 to 200 mesh or 200 to 400 mesh may be used.
- the crosslinking rate is also not particularly limited, but 1% DVB (divinylbenzene) crosslinking is preferred.
- examples of the type of polymer constituting the resin include TentaGel (registered trademark) and ChemMatrix (registered trademark).
- the compounds described herein can be salts thereof or solvates thereof.
- Salts of compounds include, for example, hydrochlorides; hydrobromides; hydroiodides; phosphates; phosphonates; sulfates; sulfonates such as methanesulfonates and p-toluenesulfonates.
- Metal salts include ammonium salts such as ammonium salts, alkylammonium salts, dialkylammonium salts, trialkylammonium salts, and tetraalkylammonium salts. These salts are produced, for example, by contacting the compound with an acid or base.
- a solvate of a compound refers to a compound in which the compound forms one molecular group together with a solvent, and is not particularly limited as long as it is a solvate formed by a solvent.
- examples include hydrates, alcoholates (ethanolates, methanolates, 1-propanolates, 2-propanolates, etc.), and solvates with a single solvent such as dimethyl sulfoxide. , one in which a solvate is formed with a plurality of solvents for one molecule of the compound, or one in which a solvate is formed with a plurality of types of solvents in one molecule of the compound.
- the solvent is water, it is called a hydrate.
- hydrates are preferable, and specific examples of such hydrates include 1 to 10 hydrates, preferably 1 to 5 hydrates, and more preferably 1 to 3 hydrates. Examples include hydrates.
- amino acid as used herein includes natural amino acids and unnatural amino acids (sometimes referred to as amino acid derivatives). Moreover, in this specification, “amino acid” may mean an amino acid residue. "Natural amino acids” as used herein include glycine (Gly), alanine (Ala), serine (Ser), threonine (Thr), valine (Val), leucine (Leu), isoleucine (Ile), and phenylalanine (Phe).
- tyrosine (Tyr), tryptophan (Trp), histidine (His), glutamic acid (Glu), aspartic acid (Asp), glutamine (Gln), asparagine (Asn), cysteine (Cys), methionine (Met), lysine (Lys) ), arginine (Arg), and proline (Pro).
- Unnatural amino acids are not particularly limited, but examples include ⁇ -amino acids, D-type amino acids, N-substituted amino acids, ⁇ , ⁇ -disubstituted amino acids, amino acids whose side chains differ from those of natural amino acids, hydroxycarboxylic acids, etc. .
- any steric configuration is acceptable for the amino acids herein.
- side chains of amino acids include alkyl groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, aralkyl groups, heteroaralkyl groups, cycloalkyl groups, and spiro bonds.
- cycloalkyl groups Each may be provided with a substituent, and these substituents are not limited, for example, any substituent containing a halogen atom, an O atom, an S atom, a N atom, a B atom, a Si atom, or a P atom.
- One or more may be independently selected from the following.
- the amino acid herein may be a compound having a carboxy group and an amino group in the same molecule (even in this case, imino acids such as proline and hydroxyproline are also included in the amino acid). included).
- the main chain amino group of the amino acid may be unsubstituted (-NH 2 ) or substituted (i.e., -NHR), where R is an optionally substituted alkyl, alkenyl, alkynyl, aryl. , heteroaryl, aralkyl, and cycloalkyl, and the carbon chain bonded to the N atom and the carbon atom at the ⁇ -position may form a ring as in proline).
- N-substituted amino acids preferably includes N-alkyl amino acid, N-C 1 -C 6 alkyl amino acid, N-C 1 -C 4 alkyl amino acid, N-methylamino acid, N-C 2 - Examples include, but are not limited to, C 6 alkenyl amino acids, N-allyl amino acids, N-C 7 -C 14 aralkyl amino acids, N-benzylamino acids, and N-phenethylamino acids.
- ⁇ , ⁇ -disubstituted amino acids specifically include, for example, Aib, (Me)Abu, (Me)Leu, (Me)Algly, (Me)Phe, (Me)Phe(3 -I), 1-ACPrC, cVal, cLeu, cHex, Athpc, etc.
- the " ⁇ -branched amino acid” herein specifically includes, for example, MeVal, D-MeVal, Val, He, MeIle, MeChg, Chg, MeGly (cPent), Gly (cPent), MeGly (cBu), Examples include Gly (cBu), MeGly (cPr), Gly (cPr), MeThr (tBu), and Thr (tBu).
- MeVal-OH is an amino acid having the following structure obtained by removing the Fmoc group from Fmoc-MeVal-OH shown in the table below, and the amino acid residue thereof is The structure of MeVal is also obvious to those skilled in the art.
- amino acid as used herein includes all its corresponding isotopes.
- Isotopes of “amino acids” are atoms in which at least one atom has the same atomic number (number of protons) but a different mass number (sum of the number of protons and neutrons), and has an abundance ratio different from the natural abundance ratio. It has been replaced.
- isotopes included in "amino acid” in this specification include hydrogen atom, carbon atom, nitrogen atom, oxygen atom, phosphorus atom, sulfur atom, fluorine atom, chlorine atom, etc., and 2 H, 3 Included are H, 13 C, 14 C, 15 N, 17 O, 18 O, 32 P, 35 S, 18 F, 36 Cl, and the like.
- Compounds herein containing all proportions of radioactive or non-radioactive isotopes are included within the scope of the invention.
- the method for producing a peptide compound by the solid phase method of the present embodiment includes a preparatory step of preparing a first amino acid or a first peptide supported on a solid phase; or a second peptide in the presence of a condensing agent and an additive.
- the peptide compound obtained by the production method of the present embodiment may be an intermediate or a final product of an amino acid or peptide elongation step using a solid phase method.
- the elongation step can be performed multiple times depending on the length of the amino acid sequence of the desired peptide compound, and the condensation step according to this embodiment is included at least once during such elongation step, and may be included multiple times. .
- methods known in the art can be used for condensation steps other than the condensation step according to this embodiment.
- the condensate obtained by the condensation step of this embodiment can become a peptide compound having a desired sequence.
- the condensate obtained by the condensation step of this embodiment is It is included in it as a substructure.
- a first amino acid or a first peptide supported on a solid phase is prepared.
- the solid phase include membranes and resins for solid phase synthesis.
- the cleavage site in the step of cutting out a peptide from a solid phase including a membrane, is cleaved as follows: cleavage of a photocleavable site by UV irradiation, cleavage of a disulfide bond by reducing conditions, acid instability by weak acid conditions. It may be in any form, such as cutting a part.
- the solid phase and the first amino acid or the first peptide may be bonded via a photocleavable site.
- a photocleavable site is a site that is cleaved by absorbing light.
- the absorption wavelength at which the photocleavable moiety undergoes cleavage may be 300 nm or more, 320 nm or more, 340 nm or more, or 350 nm or more, and may be 500 nm or less, 450 nm or less, 400 nm or less, 380 nm or less, or 370 nm or less.
- the absorption wavelength at which the photocleavable site causes cleavage may be 300 nm or more and 500 nm or less, and may be 350 nm or more and 370 nm or less.
- the wavelength of the irradiated light may be in the UV-A region from the viewpoint of better handling properties.
- the wavelength in the UV-A region refers to light with a wavelength of 320 to 400 nm.
- the photocleavable site may have a nitroberatryloxycarbonyl residue or a coumarin residue.
- the solid phase and the first amino acid or the first peptide may be bonded via a disulfide bond.
- the target peptide can be excised from the solid phase by cleaving the disulfide bond under reductive conditions such as a water/DMF solution containing tris(2-carboxyethyl)phosphine.
- the solid phase and the first amino acid or the first peptide may be bonded via an acid-labile site.
- the acid-labile site is decomposed by acidic conditions such as a TFA/DCM solution or a TFE/DCM solution containing DIPEA, and the target peptide can be excised from the solid phase.
- the acid-labile moiety has a trityl ester structure, a chlorotrityl ester structure, an alkoxybenzyl ether structure, a trialkoxybenzylaminocarbonyl structure, a dialkoxyphenyl-alkoxyphenylmethylaminocarbonyl structure, or an alkoxyxanthen-9-ylaminocarbonyl structure. It's okay to do so.
- the solid phase and the first amino acid or the first peptide may be bonded by a group that allows the peptide to be excised with an acid.
- examples of the solid phase having a group from which a peptide can be excised with an acid include CTC resin, NovaSyn TGT resin (TGT resin), Wang resin, SASRIN resin, trityl chloride resin (Trt resin), and 4-methyl Examples include resins for solid phase synthesis such as trityl chloride resin (Mtt resin) and 4-methoxytrityl chloride resin (Mmt resin).
- an arbitrary amount is used as the amount of the first amino acid or first peptide supported on the membrane, for example, an amount of 5 nmol/cm 2 or more and 500 nmol/cm 2 or less based on the Fmoc quantitative method.
- the reaction can proceed efficiently even with a high supported amount of 20 nmol/cm 2 or more, 50 nmol/cm 2 or more, 100 nmol/cm 2 or more, and even 200 nmol/cm 2 or more.
- the amount of the first amino acid or the first peptide supported on the resin for solid phase synthesis is an arbitrary amount, for example, 0.1 mmol/g based on the Fmoc quantitative method. As mentioned above, an amount of 0.8 mmol/g or less can be used, and the reaction can proceed efficiently even with a high supported amount of 0.2 mmol/g or more, 0.3 mmol/g or more, and even 0.4 mmol/g or more. be able to.
- the second amino acid or second peptide is used in an equivalent or excess amount relative to the first amino acid or first peptide.
- the molar ratio of the second amino acid or second peptide to the first amino acid or first peptide has a lower limit selected from the group consisting of 1, 2, 3, 5, 7, and 10; and an upper limit selected from the group consisting of 3, 5, 7, 10, 15, 25, 50, 100, 300, 500, and 700.
- the molar ratio of the second amino acid or second peptide to the first amino acid or first peptide is preferably 1.5 or more, more preferably 2 or more.
- the molar ratio of the second amino acid or second peptide to the first amino acid or first peptide is preferably 50 or less, more preferably 15 or less. Most preferably, the molar ratio of second amino acid or second peptide to first amino acid or first peptide is between 7 and 15.
- Examples of the additives used in the condensation step of this embodiment include Oxyma, HOBt, HOOBt, or HOAt.
- the additive is used in a smaller number of moles than the number of moles of the second amino acid or second peptide.
- the molar ratio of additive to second amino acid or second peptide is less than 1.
- the molar ratio is preferably 0.8 or less, for example 0.1 to 0.8.
- the molar ratio of the additive to the second amino acid or the second peptide is, for example, 0.01, 0.05, 0.1, 0.2, 0.3, 0.
- the range can be specified by combining the upper limit selected from the group consisting of: More preferably, the molar ratio of the additive to the second amino acid or second peptide is 0.3 to 0.7.
- the condensing agent used in the condensation step of this embodiment includes at least one carbodiimide condensing agent represented by the following general formula (A).
- Specific examples of the carbodiimide condensing agent represented by the general formula (A) include DsBC, tBEC, and DtBC.
- the condensing agent used in the condensation step of the present embodiment may include at least one carbodiimide condensing agent represented by the following general formula (A').
- R A' is 4 or more.
- Specific examples of the carbodiimide condensing agent represented by the general formula (A') include DsBC, tBEC, DtBC, and EDCI.
- the condensing agent is used in an amount equal to or greater than the number of moles of the second amino acid or second peptide.
- the molar ratio of the condensing agent to the second amino acid or the second peptide is in the range of 1 or more, in the range of 2 or more, in the range of 3 or more, or in the range of 4 or more. can do. More specifically, the molar ratio of condensing agent to second amino acid or second peptide is 1.0, 1.1, 1.2, 1.5, 2.0, 3.0, and 4.
- the preferred range of the molar ratio of the condensing agent to the second amino acid or second peptide is 1.0 to 5.0, 1.1 to 4.0, 1.1 to 3.0, 1.2 to 2 .0, 1.2 to 1.5.
- the molar ratio of the condensing agent and additive to the second amino acid or second peptide is as follows:
- the molar ratio of condensing agent to second amino acid or second peptide is selected from values consisting of 1.0, 1.1, 1.2, 1.5, 2.0, 3.0, and 4.0.
- the range can be specified by a combination of a lower limit selected from a value of 1.5, 2.0, 3.0, 4.0, and 5.0
- the molar ratio of additive to second amino acid or second peptide was 0.01, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 and 0.
- a lower limit selected from values consisting of .7 and values consisting of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0.
- the range can be specified by combining with the upper limit selected from the range.
- the condensation step of the present embodiment can be carried out at a reaction temperature of 0 to 100°C, preferably 10 to 60°C, more preferably 20 to 50°C.
- the condensation step of the present embodiment can be carried out for a reaction time of 10 minutes to 2 days, preferably 10 minutes to 6 hours, more preferably 30 minutes to 60 minutes. Moreover, it can also be repeated two or more times.
- the additive is HOAt, HOOBt, or Oxyma
- the condensation agent is DsBC.
- the condensation reaction of this embodiment can be performed in a suitable solvent.
- an aprotic solvent can be used, and examples thereof include amide solvents, ester solvents, ether solvents, alkylnitrile solvents, and urea solvents.
- amide solvents include DMF, DMA, and NMP.
- ester solvents include ethyl acetate and dimethyl carbonate.
- ether solvents include tetrahydrofuran and 2-methyltetrahydrofuran.
- alkylnitrile solvents include acetonitrile and the like.
- urea-based solvents include DMI and TMU.
- the condensation step of this embodiment can be performed by bringing the first amino acid or first peptide supported on a solid phase into contact with the second amino acid or second peptide, the condensing agent, and the additive. .
- the order in which the first amino acid or first peptide is contacted with the second amino acid or second peptide, the condensing agent, and the additive is arbitrary; The two amino acids or the second peptide, the condensing agent, and the additive may be contacted simultaneously or sequentially.
- the first amino acid or the first peptide may be contacted with a mixture of the second amino acid or the second peptide, the condensing agent, and/or any or all of the additives in advance.
- a mixture of these with an appropriate solvent may be used.
- the method of this embodiment may be performed using a solid phase synthesis apparatus.
- the method of this embodiment includes mixing a first amino acid or a first peptide supported on a solid phase with a second amino acid or a second peptide, a condensing agent, and an additive in a suitable solvent. This can be done by
- the solid phase is a resin for solid phase synthesis
- the resin for solid phase synthesis is swollen by contact with an appropriate solvent. By doing so, the desired condensation reaction can proceed efficiently.
- the amount of solvent used in this pretreatment can be any amount as long as the swollen resin is immersed in the solvent.
- v/w to 15 v/w preferably from 4 v/w to 10 v/w, more preferably from 4 v/w to 8 v/w.
- amount of solvent is described as 4 v/w, it means that the amount of solvent is 4 mL per 1 g of resin weight.
- a target peptide compound bound to a resin for solid phase synthesis can be obtained.
- solvents suitable for washing and/or swelling membranes or solid-phase synthesis resins include amide-based and alcohol-based solvents, with DMF, ethanol, or 2-propanol being preferred. These solvents may be used multiple times or alternately.
- the swollen resin for solid-phase synthesis can be contracted if necessary by washing with an alcohol-based solvent or an ether-based solvent.
- the alcohol solvent is preferably methanol
- the ether solvent is preferably methyl t-butyl ether (MTBE).
- a mixture of the second amino acid or the second peptide, the condensing agent, and the additives in a solvent may be prepared in advance and used in the condensation reaction.
- the mixing time is not particularly limited, but is preferably 0 minutes to 2 hours, more preferably 0 minutes to 1 hour, and even more preferably about 15 minutes.
- Stirring or shaking the resin using automatic synthesis equipment can be important in ensuring that the resin fully penetrates the reaction solution and allowing the reaction to proceed as desired.
- the stirring speed, shaking speed, and their frequency are not particularly limited, but since excessive stirring may cause physical damage to the resin, for example, stirring at 60 rpm is performed for about 2 minutes every hour. Further, stirring and shaking are not necessarily required if penetration is sufficient.
- the method of the present embodiment may further include the step of removing the membrane and solid-phase synthesis resin, and methods known in the art can be used for this.
- the peptide compound extended to the desired sequence can be detached from the membrane and resin and isolated.
- the method of the present embodiment may further include the step of removing the protecting group, and methods known in the art can be used for this.
- the method described in “Greene's, “Protective Groups in Organic Synthesis” (5th edition, John Wiley & Sons 2014)" can be mentioned, and these may be used as appropriate depending on the reaction conditions.
- removing the protecting group will prevent the next condensation. Ready for reaction.
- the protecting group may be removed simultaneously with the condensation reaction or separately from the condensation reaction.
- the present embodiments provide linear peptide compounds obtained using the methods of the present embodiments and then using Comprehensive Organic Transformations, A Guide to Functional Group Preparations, 3rd Edition (by R. C. Larock), or March's
- the N-terminal group and the C-terminal group are cyclized using the known method described in Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 7th Edition (authored by M. B. Smith, J. March).
- the present invention also relates to a method for producing a cyclic peptide compound.
- analysis conditions such as LCMS are as shown in Tables 1 and 2 below.
- Fmoc protected amino acids listed in Table 3 were purchased from commercial suppliers.
- the Fmoc-protected amino acids listed in Table 4 were synthesized according to the method described in WO2018/225864.
- the Fmoc-protected amino acids listed in Table 5 were synthesized by the method described in Example 1-1.
- the LCMS (ESI) m/z value may vary within a range of about ⁇ 0.2 and the retention time may vary within a range of about ⁇ 0.07 minutes.
- Example 1 Preparation of Fmoc-protected amino acids, urea, membrane-supported peptides, etc. used in this example Membrane discs were CelluSpots 384 frame with acid stable discs or Refill of membrane discs purchased from Intavis (currently CEM). Two frames, 384 acid stable discs (amino group modified membrane) were used.
- Example 1-1 Compound SS01, (2S)-2-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]-4-(1-methyl-1-phenyl-ethoxy)-4-oxo-butane Synthesis of acid (Fmoc-MeAsp(OPis)-OH) (2S)-2-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]-4-(1-methyl-1-phenyl-ethoxy)-4-oxo-butanoic acid (Fmoc-MeAsp) according to the above scheme. (OPis)-OH, SS01) was synthesized.
- Example 1-1-1 Synthesis of O4-allyl O1-methyl (2S)-2-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]butanedioate (compound SS01a) (S)-2-((((9H-fluoren-9-yl-)methoxy)carbonyl)(methyl)amino)-4-(allyloxy)-4- synthesized by the method described in WO2018/124162 under a nitrogen atmosphere DCM (1.15 L) was added to oxobutanoic acid (compound pd04) (100.0 g, 244.2 mmol), and EDCI/HCl (60.87 g, 317.5 mmol) and HOAt (43.22 g, 317.5 mmol) were added at room temperature and stirred for 30 minutes.
- compound pd04 oxobutanoic acid
- EDCI/HCl 60.87 g, 317.5 mmol
- HOAt 43.22
- Example 1-1-2 Synthesis of (3S)-3-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]-4-oxo-butanoic acid (compound SS01b) DCM (350 mL) was added to the crude product of compound SS01a (100.0 g, purity 76%, 179.5 mmol) under a nitrogen atmosphere, and tetrakistriphenylphosphine palladium (2.07 g, 1.795 mmol) and phenylsilane ( 13.60 g, 125.7 mmol) was added and stirred for 3 hours. Thereafter, TBME was added to dilute the mixture, and the mixture was extracted with a saturated aqueous sodium carbonate solution.
- Example 1-1-3 O1-methyl O4-(1-methyl-1-phenyl-ethyl)(2S)-2-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]butanedioate (compound Synthesis of SS01c) 2-phenylpropan-2-yl 2,2,2-trichloroacetimidate was synthesized by adding DCM (100 mL) to compound SS01b (50.00 g, 130.4 mmol) under a nitrogen atmosphere and using the method described in WO2018/124162.
- Example 1-1-4 (2S)-2-[9H-fluoren-9-ylmethoxycarbonyl(methyl)amino]-4-(1-methyl-1-phenyl-ethoxy)-4-oxo-butanoic acid Synthesis of (compound SS01, Fmoc-MeAsp(OPis)-OH) Calcium chloride (248.9 g, 2243 mmol) and lithium hydroxide monohydrate (25.10 g, 588.1 mmol) were dissolved in a mixed solvent of 2-propanol (3 L) and H 2 O (750 mL) and incubated in an ice bath. Cooled to 0°C.
- Example 1-2 Preparation of amino acids, peptides, etc. supported on the membrane used in this example
- the membrane or resin site is indicated with a circle.
- the chemical structure of the reaction site may be indicated by connecting it to a circle.
- the amino group of the amino group-modified membrane forms an amide bond with the carboxylic acid of the Photo-Linker.
- the solution obtained after the peptide excision reaction from the membrane using the membrane obtained after the elongation was measured by LCMS. Show specific steps.
- the UV irradiation equipment used was a UV-LED irradiation box MUB-031 commissioned by MLC, or a separate UV-LED irradiation device manufactured by Shodensha Co., Ltd., and the reaction vessel was placed on ice or at room temperature.
- the stretched and dried membrane disk was irradiated with UV light at a wavelength of 365 nm and an illuminance of 380 to 600 mW/cm 2 for 2 minutes and 30 seconds. Thereafter, 100 ⁇ L of DMSO was added to the membrane, and the membrane was allowed to stand for 15 minutes or more to dissolve the peptide.
- the solution was analyzed by LCMS.
- Example 1-2-1 Compound SS02 (Fmoc-MePhe-Photo-Linker-Membrane), Compound SS03 (Fmoc-Pro-Photo-Linker-Membrane), Compound SS24 (Fmoc-MeAla-Photo-Linker-Me mbrane), Synthesis of compound SS25 (Fmoc-MeSer (THP)-Photo-Linker-Membrane)
- Compounds SS02, SS03, SS24, and SS25 used in this example were prepared by the Fmoc method using a peptide synthesizer (Multipep RS; manufactured by Intavis). For detailed operating procedures, the manual included with the synthesizer was followed.
- reaction conditions were prepared by referring to WO2018/225851 and using the following procedure 1 or 2.
- Fmoc-Photo-Linker and Fmoc-MePhe-OH were added in this order
- Fmoc-Photo-Linker and Fmoc-Pro-OH were added in this order
- compound SS24 was added.
- Fmoc-Photo-Linker and Fmoc-MeSer(THP)-OH were added in this order, respectively, and Fmoc-protected. It was used as an amino acid.
- Solution 1 was prepared by dissolving Fmoc-protected amino acids (0.6 mol/L) constituting the target peptide and HOAt, Oxyma, or HOOBt (0.375 mol/L) as a carboxylic acid activator in NMP.
- Solution 2 was prepared by mixing N,N'-diisopropylcarbodiimide (DIC) (0.71 mol/L) and N,N-dimethylformamide (DMF).
- DIC N,N'-diisopropylcarbodiimide
- DMF N,N-dimethylformamide
- CelluSpots 384 frame with acid stable discs (amino group-modified membrane manufactured by Intavis; hereinafter also referred to as "membrane disc" was set in a peptide synthesizer.
- Solution 1 and Solution 2 were set in a peptide synthesizer, and automatic synthesis by the peptide synthesizer was started.
- Extension process Solution 1 and solution 2 were mixed at a ratio of 5:6 in a mixing vial of a synthesizer, left to stand for 15 minutes, and then added to each membrane disk at 1.2 ⁇ L and reacted at room temperature for 40 minutes. After performing a condensation reaction between the amino group on the membrane disk and the Fmoc-protected amino acid, the solution was discharged. This condensation reaction was repeated one more time. Subsequently, 4.0 ⁇ L of a DMF solution (4% v/v) of acetic anhydride (Ac 2 O) was added per membrane disk, and unreacted amine was capped with acetyl at room temperature. After reacting for 5 minutes, the solution was drained.
- a DMF solution 4% v/v
- acetic anhydride Ac 2 O
- Extension process solution 1 and solution 2 were mixed in a mixing vial of a synthesizer at a ratio of 11.29:0.72 and allowed to stand for 15 minutes, then 1.2 ⁇ L per membrane disk was added and incubated at room temperature for 40 minutes. After the reaction caused a condensation reaction between the amino group on the membrane disk and the Fmoc-protected amino acid, the solution was discharged. This condensation reaction was repeated one more time. Thereafter, the same method as the elongation step in [Operation 1] was performed.
- Example 1-2-2 Excision and analysis of Fmoc-MePhe or Fmoc-Pro supported on a membrane
- the peptide was excised by the method described in 2, and the production of the target peptides (compounds SS02*, SS03*, SS24* and SS25*) was confirmed.
- a compound number is marked with *, it indicates a compound that was confirmed by cutting out a peptide from a membrane disk to confirm the reaction.
- Example 1-2-3 Confirmation of the amount of Fmoc-amino acid supported on the membrane
- the amount of Fmoc-amino acid supported on the membrane was confirmed by the following method.
- Compounds SS02, SS03, SS24, and SS25 (one membrane disk each) prepared by the method in Step 1 or Step 2 were placed in a reaction container, and a solution of DBU in DMF (2% v/v) was added at a rate of 4.5 mm per membrane disk. After adding 0 ⁇ L and reacting at room temperature for 5 minutes, 4.0 ⁇ L was added again and reacting at room temperature for 10 minutes to deprotect the Fmoc group.
- Fmoc-Gly-OH (3.51 mg, 0.012 mmol) was dissolved in a DBU DMF solution (1.5 mL, 0.201 mmol) and reacted at room temperature for 15 minutes to deprotect the Fmoc group. . Thereafter, DMF (148.5 mL) was added to the reaction mixture to dilute it. The obtained diluted solution was analyzed by LC/MS (analysis conditions SQDFA05_1, injection volume: 5 ⁇ L). The UV area value of dibenzofulvene at a wavelength of 304 nm was 8903.11, and the UV area value (wavelength 304 nm) per 1 nmol was calculated from this value.
- the supported amounts of compound SS02 and compound SS03 were calculated from the following formula.
- Supported amount (nmol) (UV area value of compound SS04 (wavelength 304 nm)) / (UV area value per 1 nmol of dibenzofulvene (wavelength 304 nm))
- the supported amounts of compounds SS02, SS03, SS24, and SS25 were calculated to be 57.9 nmol/membrane disk, 55.9 nmol/membrane disk, 66.4 nmol/membrane disk, and 64.7 nmol/membrane disk, respectively.
- different lots synthesized in the same manner but with different supported amounts were also used for peptide synthesis and investigation.
- Example 1-3 Synthesis of carbodiimide-derived urea used in this example
- Example 1-3-1 Synthesis of 1,3-diisopropylurea (DIC urea, compound SS05)
- DIC urea compound SS05
- acetic acid 1.178 mL, 20.60 mmol
- the resulting precipitate was then collected by filtration, and the resulting solid was washed with TBME and dried under reduced pressure to obtain 1,3-diisopropylurea (DIC urea, compound SS05) (909.1 mg, 80 %) was obtained.
- Example 1-3-2 Synthesis of 1,3-di-sec-butyl urea (DsBC urea, compound SS06) After adding TBME (7.73 mL) to DsBC (0.356 ⁇ L, 1.945 mmol) at room temperature, acetic acid (0.289 ⁇ L, 5.06 mmol) was added dropwise over 5 minutes and the reaction mixture was incubated at room temperature for 15 minutes. Stirred. Thereafter, water (70.1 ⁇ L, 3.89 mmol) was added, and the mixture was stirred at room temperature for 2.5 hours. Thereafter, it was concentrated by blowing with nitrogen, and water was added.
- DsBC urea 1,3-di-sec-butyl urea
- Example 1-3-3 Synthesis of 1-(tert-butyl)-3-ethyl urea (tBEC urea, compound SS07) After adding TBME (15.7 mL) to tBEC (0.614 ⁇ L, 3.96 mmol) at room temperature, acetic acid (0.589 ⁇ L, 10.30 mmol) was added dropwise over 5 minutes and the reaction mixture was incubated at room temperature for 2 hours. Half stirred. It was then concentrated by blowing with nitrogen and a 1:2 mixture of MeCN and water was added. The resulting precipitate was collected by filtration and the resulting solid was washed with a 1:2 mixture of MeCN and water. The filtrate was concentrated under reduced pressure, and water was added.
- tBEC urea compound SS07
- Example 1-4 Synthesis of carbodiimide used in this example According to the above scheme, N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26), N'-(1-methylheptyl)-N-sec-butyl-methanediimine (SS27), N,N '-Bis(1-methylbutyl)methanediimine (SS28), N,N'-bis(1-ethylpropyl)methanediimine (SS29), and N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine ( SS30) was synthesized.
- SS26 N'-(1-phenylethyl)-N-sec-butyl-methanediimine
- SS27 N,N '-Bis(1-methylbutyl)methanediimine
- SS28 N,N
- Example 1-4-1 Synthesis of 1-(1-phenylethyl)-3-sec-butyl-thiourea (compound SS26a) 2-isothiocyanatobutane (500 ⁇ L, 4.08 mmol) and 1-phenylethanamine (567 ⁇ L, 4.49 mmol) were added to DCM (20.4 mL) at room temperature and stirred at room temperature for 17 hours. The mixture was concentrated under reduced pressure, and the resulting residue was purified twice by normal phase silica gel column chromatography (ethyl acetate/n-hexane) to obtain 874.6 mg (yield 91%) of compound SS26a as a diastereomer mixture.
- Ta. LCMS (ESI) m/z 237.1 [M+H] + Retention time: 0.77 minutes (Analysis conditions SQDFA05_1)
- Example 1-4-2 Synthesis of N'-(1-phenylethyl)-N-sec-butyl-methanediimine (SS26)
- SS26a Compound SS26a (149.6 mg, 0.633 mmol) was added to DCM (6.329 mL), and triethylamine (265 ⁇ L, 1.899 mmol), 4-dimethylaminopyridine (77 mg, 0.633 mmol) and ethane were added under ice cooling.
- Sulfonyl chloride 120 ⁇ L, 1.266 mmol was added. After stirring for 5 minutes under ice-cooling, the mixture was heated to room temperature and stirred at room temperature for 1 hour.
- Example 1-4-3 Synthesis of 1-(1-methylheptyl)-3-sec-butyl-thiourea (compound SS27a) 2-isothiocyanatobutane (300 ⁇ L, 2.45 mmol) and 2-octanamine (452 ⁇ L, 2.69 mmol) were added to DCM (12.2 mL) at room temperature and stirred at room temperature for 17 hours. The mixture was concentrated under reduced pressure, and the resulting residue was purified twice by normal phase silica gel column chromatography (ethyl acetate/n-hexane) to obtain 552.0 mg (yield 92%) of compound SS27a as a diastereomer mixture.
- Ta. LCMS (ESI) m/z 245.2 [M+H] + Retention time: 0.94 minutes (Analysis conditions SQDFA05_1)
- Example 1-4-4 Synthesis of N'-(1-methylheptyl)-N-sec-butyl-methanediimine (SS27)
- SS27a 150 mg, 0.614 mmol
- DCM 6.136 mL
- DIPEA 315 ⁇ L, 1.841 mmol
- 4-dimethylaminopyridine 75 mg, 0.614 mmol
- ethanesulfonyl chloride were added under ice cooling. (116 ⁇ L, 1.227 mmol) was added. After stirring for 5 minutes under ice-cooling, the mixture was heated to room temperature and stirred at room temperature for 1 hour.
- Example 1-4-5 Synthesis of 1,3-bis(1-methylbutyl)thiourea (compound SS28a) 2-isothiocyanatopentane (300 ⁇ L, 2.16 mmol) and 2-pentanamine (280 ⁇ L, 2.38 mmol) were added to DCM (10.8 mL) at room temperature and stirred at room temperature for 20 hours. The mixture was concentrated under reduced pressure, and the resulting residue was purified by normal phase silica gel column chromatography (ethyl acetate/n-hexane) to obtain 426.8 mg (yield 91%) of compound SS28a as a diastereomer mixture.
- LCMS (ESI) m/z 217.2 [M+H] + Retention time: 0.82 minutes (Analysis conditions SQDFA05_1)
- Example 1-4-6 Synthesis of N,N'-bis(1-methylbutyl)methanediimine (SS28) Compound SS28a (199.8 mg, 0.923 mmol) was added to DCM (9.233 mL), and triethylamine (386 ⁇ L, 2.77 mmol), 4-dimethylaminopyridine (113 mg, 0.923 mmol) and ethane were added under ice cooling. Sulfonyl chloride (175 ⁇ L, 1.847 mmol) was added. After stirring for 5 minutes under ice-cooling, the mixture was heated to room temperature and stirred at room temperature for 1 hour.
- SS28a N,N'-bis(1-methylbutyl)methanediimine
- Example 1-4-8 Synthesis of N,N'-bis(1-ethylpropyl)methanediimine (SS29)
- SS29a 200.8 mg, 0.928 mmol
- DCM 9.280 mL
- triethylamine 388 ⁇ L, 2.78 mmol
- 4-dimethylaminopyridine 113 mg, 0.928 mmol
- ethane ethanediimine
- Sulfonyl chloride (175 ⁇ L, 1.856 mmol) was added. After stirring for 5 minutes under ice-cooling, the mixture was heated to room temperature and stirred at room temperature for 0.5 hour.
- Example 1-4-9 Synthesis of 1-(1-ethylpropyl)-3-(1-methylbutyl)thiourea (compound SS30a) 2-isothiocyanatopentane (300 ⁇ L, 2.16 mmol) and 3-pentanamine (276 ⁇ L, 2.37 mmol) were added to DCM (10.8 mL) at room temperature and stirred at room temperature for 20 hours. The mixture was concentrated under reduced pressure, and the resulting residue was purified by normal phase silica gel column chromatography (ethyl acetate/n-hexane) to obtain 418.3 mg (yield 90%) of compound SS30a as a diastereomer mixture.
- LCMS (ESI) m/z 217.2 [M+H] + Retention time: 0.80 minutes (Analysis conditions SQDFA05_1)
- Example 1-4-10 Synthesis of N'-(1-ethylpropyl)-N-(1-methylbutyl)methanediimine (SS30)
- SS30a 201.1 mg, 0.929 mmol
- DCM 9.294 mL
- triethylamine 389 ⁇ L, 2.79 mmol
- 4-dimethylaminopyridine 114 mg, 0.929 mmol
- ethane were added under ice cooling.
- Sulfonyl chloride (176 ⁇ L, 1.859 mmol) was added. After stirring for 5 minutes under ice-cooling, the mixture was heated to room temperature and stirred at room temperature for 0.5 hour.
- Example 2 Experiment in which the types of reagents and reaction conditions were examined for the elongation step in peptide synthesis on a membrane
- amino acid elongation is performed after de-Fmoc and membrane washing.
- a peptide sequence (compound SS02) supported on the membrane
- changed the reaction conditions such as the reagent and equivalence ratio of the amino acid elongation process, and compared the reaction efficiency of the desired elongation reaction.
- glycine capping was performed to confirm the residual rate of the starting material.
- the elongation reaction of Fmoc-Gly-OH was subsequently carried out to react with the unreacted amine. Thereafter, it was cut out from the membrane using the method described in Example 1-2, and the extension efficiency of the target amino acid was calculated by comparing the UV area values of the peptide with the target amino acid extended and the peptide with Fmoc-Gly-OH extended. .
- Reference Example 2-1 Peptide synthesis experiment on membrane under the reaction conditions described in Methods Mol . Biol., 2009, 570, 157 - 174
- Reference Example 2-1-1 Removal of Fmoc group on MePhe supported on membrane
- DMF 100 ⁇ L per membrane disk
- ethanol 100 ⁇ L per membrane disk
- the mixture was mixed at a ratio of 3.0 ⁇ L after being allowed to stand for 10 to 15 minutes and added to the membrane in the reaction container. After the membrane was covered with a lid and allowed to stand at room temperature for 25 to 60 minutes, the solution was discharged from the membrane, and the above-described extension reaction of Fmoc-Gly-OH was performed again. After draining the solution, the membranes were washed 3-4 times with DMF (100 ⁇ L per membrane disk) and 3 times with ethanol (100 ⁇ L per membrane disk) and air-dried.
- Reference Example 2-1-3 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Reference Example 2-1-2 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed.
- LCMS (ESI) m/z 514.5 [M+H] + Retention time: 3.64 minutes (Analysis conditions SQDAA05long)
- LCMS (ESI) m/z 458.3 [M+H] + Retention time: 3.20 minutes (Analysis conditions SQDAA05long)
- Extension efficiency (%) (UV area value of SS09*) / (sum value of UV area value of SS09* and UV area value of SS10*) x 100
- Reference Example 2-2 Peptide synthesis experiment on membrane under reaction conditions described in WO2018/225851
- Reference Example 2-2-1 Extension reaction of Fmoc-Nle-OH to MePhe supported on the membrane Using the membrane (compound SS08) obtained in Reference Example 2-1-1, containing an N-substituted amino acid Reaction conditions were set with reference to the peptide synthesis method (WO2018/225851), and an extension reaction of Fmoc-Nle-OH to MePhe on the membrane was performed.
- Reference Example 2-2-2 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Reference Example 2-2-1 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed. The extension efficiency was calculated according to the formula described in Reference Example 2-1. The conditions and results of Reference Example 2-2 are shown in Table 7 below.
- Reference Example 2-3 Peptide synthesis experiment on membrane under high reagent concentration conditions
- Reference Example 2-3-1 Extension reaction of Fmoc-Nle-OH to MePhe supported on the membrane Using the membrane (compound SS08) obtained in Reference Example 2-1-1, in order to increase the extension efficiency.
- Ratio (%) of UV area value of active ester (UV area value of active ester) / (UV area value of Fmoc-Nle-OH + UV area value of active ester + UV area value of peak 1 + UV of peak 2 Area value) x 100
- peak 1 has a retention time of 1.07 minutes and is estimated to be a product consisting of Fmoc-Nle-OH and DIC
- peak 2 has a retention time of 1.22 minutes and is a product of Fmoc-Nle-OH. It is estimated to be a mass.
- the subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Reference Example 2-3-2 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide using the method described in Example 1-2 from the membrane obtained in Reference Example 2-3-1 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed.
- the extension efficiency was calculated according to the formula described in Reference Example 2-1. As shown in Table 9 below, the elongation efficiency under conditions of high reagent concentration using DIC as a condensing agent was as high as 83% to 96%. However, under all conditions, precipitates were generated, making it difficult to apply these conditions to automatic synthesis.
- Example 2-4 Peptide synthesis experiment on membrane under reaction conditions in which DsBC was used instead of DIC
- Example 2-4-1 Extension reaction of Fmoc-Nle-OH to MePhe supported on the membrane
- the membrane obtained in Reference Example 2-1-1 (compound SS08) was used, and DIC was changed to DsBC.
- the extension reaction of Fmoc-Nle-OH to MePhe on the membrane was carried out under the reaction conditions.
- Dissolve Fmoc-Nle-OH (0.63 mol/L) and HOAt (0.198 mol/L or 0.397 mol/L) in a solution of NMP/DMF 5/6 or 6.68/4.34, or in DMF.
- Ratio (%) of UV area value of active ester (UV area value of active ester) / (UV area value of Fmoc-Nle-OH + UV area value of active ester + UV area value of peak 2 + UV of peak 3 Area value) x 100
- peak 3 is a peak with a retention time of 1.15 minutes and is estimated to be a product consisting of Fmoc-Nle-OH and DsBC
- peak 2 is a peak with a retention time of 1.22 minutes and is a product of Fmoc-Nle-OH. It is estimated to be a mass.
- the subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 2-4-2 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Example 2-4-1 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed.
- the extension efficiency was calculated according to the formula described in Reference Example 2-1.
- the conditions and results of Reference Example 2-3 and Example 2-4 are shown in Tables 8 and 9 below. Using DsBC as a condensing agent, condensation was investigated under conditions of high reagent concentration, and as shown in Table 9, the elongation efficiency was as high as 90% to 98%. Since no precipitate is generated under these conditions, it can be applied to automatic synthesis.
- Example 2-5 Experiment comparing the effects of using DsBC and DIC in on-membrane peptide synthesis using other Fmoc-protected amino acids and various activators
- Example 2-5-1 Extension reaction of Fmoc-MeSer(THP)-OH to MePhe supported on membrane under DsBC usage conditions Using the membrane obtained in Reference Example 2-1-1 (compound SS08), the extension reaction of Fmoc-MeSer(THP)-OH to MePhe on the membrane was carried out with reference to the reaction conditions of Example 2-4-1. went.
- Reference Example 2-5-2 Extension reaction of Fmoc-MeSer(THP)-OH to MePhe supported on the membrane under DIC usage conditions Using the membrane obtained in Reference Example 2-1-1 (compound SS08) Then, an elongation reaction of Fmoc-MeSer(THP)-OH to MePhe on the membrane was performed with reference to the reaction conditions of Reference Example 2-3-1.
- Example 2-5-3 Extension reaction of Fmoc-MeAsp(OPis)-OH to MeAla supported on membrane under DsBC usage conditions Using the peptide-supported membrane disk (compound SS24) already prepared in Example 1-2-1, the Fmoc group was removed according to the method described in Reference Example 2-1-1 to obtain compound SS31. Using the obtained membrane (compound SS31), an extension reaction of Fmoc-MeAsp(OPis)-OH to MeAla on the membrane was performed with reference to the reaction conditions of Example 2-4-1.
- Reference Example 2-5-4 Extension reaction of Fmoc-MeAsp(OPis)-OH to MeAla supported on the membrane under DIC conditions using the membrane obtained in Example 2-5-3 (compound SS31) Then, an elongation reaction of Fmoc-MeAsp(OPis)-OH to MeAla on the membrane was performed with reference to the reaction conditions of Reference Example 2-3-1.
- a solution of Fmoc-MeAsp(OPis)-OH (0.62 mol/L) and Oxyma (0.193 mol/L) dissolved in DMF and DIC (stock solution) were mixed at a ratio of 10:1.353, and then mixed for 15 minutes. After standing still, 1.2 ⁇ L of the solution was added to the membrane (compound SS31) and left standing at room temperature for 30 minutes. The subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 2-5-5 Extension reaction of Fmoc-MePhe-OH to MeSer (THP) supported on a membrane under DsBC usage conditions Using the peptide-supported membrane disk (compound SS25) already prepared in Example 1-2-1, the Fmoc group was removed according to the method described in Reference Example 2-1-1 to obtain compound SS33. Using the obtained membrane (compound SS33), an extension reaction of Fmoc-MePhe-OH to MeSer (THP) on the membrane was performed with reference to the reaction conditions of Example 2-4-1.
- Reference Example 2-5-6 Extension reaction of Fmoc-MePhe-OH to MeSer (THP) supported on the membrane under DIC usage conditions Using the membrane obtained in Example 2-5-5 (compound SS33) Then, an elongation reaction of Fmoc-MePhe-OH to MeSer (THP) on the membrane was performed with reference to the reaction conditions of Reference Example 2-3-1. A solution in which Fmoc-MePhe-OH (0.62 mol/L) and HOAt (0.193 mol/L) were dissolved in DMF and DIC (undiluted solution) were mixed at a ratio of 10:1.353 and allowed to stand for 15 minutes. Thereafter, 1.2 ⁇ L of the solution was added to the membrane (compound SS33) and left at room temperature for 30 minutes. The subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 2-5-7 Excision and analysis of various peptides supported on membrane Examples (reference examples)
- the membranes obtained in 2-5-1 to 2-5-6 were subjected to Peptides were excised according to the method described, and target peptides (compounds SS12*, SS32* and SS34*) and peptides with Fmoc-Gly-OH extended in place of the desired Fmoc-protected amino acids (compounds SS10*, SS35* and SS36 *) (these are sometimes referred to as Glycine capping bodies) was confirmed to be produced.
- target peptides compounds SS12*, SS32* and SS34*
- peptides with Fmoc-Gly-OH extended in place of the desired Fmoc-protected amino acids compounds SS10*, SS35* and SS36 *
- Extension efficiency (%) (UV area value of target peptide) / (total value of UV area value of target peptide and UV area value of glycine capping body) x 100
- Table 10 The conditions and results of Examples (Reference Examples) 2-5-1 to 2-5-6 are shown in Table 10 below. Under the conditions in which DIC was used as a condensing agent, precipitates were generated in all cases, making it difficult to apply to automatic synthesis.
- Example 2-6 Urea solubility verification experiment
- Example 2-6-1 Experiment to confirm the solubility of DIC urea, DsBC urea, and tBEC urea in DMF The concentration of carbodiimide is 0.77 mol/L.
- precipitates were confirmed in DIC in Reference Example 2-3 and in Examples 2-4 and 2-5.
- urea derived from DsBC which was not present, its solubility in NMP and DMF was confirmed according to the following procedure.
- DIC urea (compound SS05) and DsBC urea (compound SS06) synthesized in Example 1-3 were weighed as shown in Table 11 into a 1.5 mL screw cap vial, and NMP or DMF was added to each concentration. . The mixture was stirred at room temperature for 5 minutes or more, and then allowed to stand to check whether or not urea had dissolved. As a result, the solids of compound SS05, which is a DIC urea, were not completely dissolved at concentrations of 0.34 M or higher in NMP and 0.17 M or higher in DMF, whereas the solids of compound SS06, which is a DsBC urea, were not completely dissolved in both NMP and DMF. It was completely dissolved at .77M and no reprecipitation was observed even after 24 hours or more.
- Example 2-6-2 Experiment to confirm the solubility of tBEC urea in DMF An experiment similar to Example 2-6-1 was conducted using tBEC having a different alkyl group from DIC and DsBC. 10.18 mg and 10.19 mg of tBEC urea (compound SS07) synthesized in Example 1-3 were weighed into a 1.5 mL screw cap vial, and NMP or DMF was added to each at a concentration of 0.77 mol/L. . The mixture was stirred at room temperature for 5 minutes or more, and then allowed to stand to check whether or not urea had dissolved. As a result, tBEC urea was completely dissolved as well as DsBC urea, and no reprecipitation was observed even after 24 hours or more had passed.
- Example 2-7 Peptide synthesis experiment on membrane under high concentration conditions using other carbodiimides
- Example 2-7-1 Extension reaction of Fmoc-Nle-OH to MePhe supported on a membrane using tBEC Using the membrane obtained in Reference Example 2-1-1 (compound SS08), Example Referring to the reaction conditions of 2-4-1, the elongation reaction of Fmoc-Nle-OH to MePhe on the membrane was carried out using tBEC, in which good solubility of urea in DMF was confirmed in Example 2-6. .
- Example 2-7-2 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Example 2-7-1 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed. The extension efficiency was calculated according to the formula described in Reference Example 2-1. The results of Examples 2-7 are shown in Table 12 below.
- Example 2-7-3 Extension reaction of Fmoc-Nle-OH to MePhe supported on the membrane using various condensing agents
- the membrane obtained in Reference Example 2-1-1 (compound SS08) was used.
- the extension reaction of Fmoc-Nle-OH to MePhe on the membrane was carried out using various carbodiimides synthesized in Example 1-4 with reference to the reaction conditions of Example 2-4-1.
- Table 13 a solution of Fmoc-Nle-OH and HOAt in DMF was mixed with carbodiimide (undiluted solution), and after standing for 15 minutes, the solution was mixed with the membrane obtained in Reference Example 2-1-1 ( 1.2 ⁇ L was added to Compound SS08) and allowed to stand at room temperature for 30 minutes.
- the subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 2-7-4 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Example 2-7-3 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed.
- the extension efficiency was calculated according to the formula described in Reference Example 2-1. The results are shown in Table 14 below.
- the elongation efficiency was as high as 97% to 99%. Furthermore, in the condensation reaction using compounds SS26, SS27, SS28, and SS30, no precipitate was generated and it was possible to elongate the Fmoc-protected amino acid, and the conditions were applicable to automatic synthesis.
- Example 2-8 Peptide synthesis experiments on membranes at various reaction temperatures, reaction solvents, and equivalent amounts of reagents
- Example 2-8-1 Extension reaction of Fmoc-Nle-OH on MePhe supported on the membrane at various reaction temperatures and equivalent ratios of reaction solvents and reagents Membrane obtained in Reference Example 2-1-1 (Compound SS08), the extension reaction of Fmoc-Nle-OH to MePhe on the membrane was performed by changing the reaction temperature, reaction solvent, and equivalent amount of reagent based on the reaction conditions of Example 2-4-1. Ta.
- Example 2-8-2 Excision and analysis of Fmoc-Nle-MePhe supported on membrane Excision of peptide from the membrane obtained in Example 2-8-1 by the method described in Example 1-2 The production of a target peptide (compound SS09*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of Fmoc-Nle-OH was confirmed.
- the extension efficiency was calculated according to the formula described in Reference Example 2-1. The results are shown in Table 16 below.
- Example 2-5 the present reaction conditions can be applied even when the amino acids and activators are different, and the production of the desired peptide was confirmed without any precipitation of urea.
- Example 2-6 it was confirmed that even if all DsBC was converted to urea, the risk of precipitation was extremely low. Furthermore, it was confirmed that the risk of urea precipitation is similarly extremely low in tBEC, which has a different alkyl group from DsBC. Furthermore, in the condensation reaction using compounds SS26, SS27, SS28, and SS30, no precipitate was observed in the preactivation solution as in Example 2-7, and extension of the Fmoc-protected amino acid was possible.
- the reaction conditions using DsBC which can produce the desired peptide without precipitation of urea
- elevated temperature conditions such as 40°C and 60°C
- various reaction solvents such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 19, 20, 21, 22, 20, 21, 22, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 30, 31, 30, 31, 32, 33, 34, 35, 36, 35, 36, 39, 40, 40, 40, 40°C and 60°C, various reaction solvents, and equivalent ratios of reagents.
- some reaction conditions including the type of carbodiimide that can suppress the precipitation of urea derived from carbodiimide while improving the elongation efficiency in the elongation step of peptide synthesis on a membrane were identified.
- Example 3 Expansion of the applicable range of substrates, application experiment to automated synthesis using a peptide synthesizer
- this experiment using the preferred reaction conditions for peptide synthesis on membranes specified in Example 2, we performed elongation reactions of other amino acids. was carried out. The amino acid elongation efficiency was evaluated in the same manner as in Example 2. We also applied these conditions to a peptide synthesizer.
- Example 3-1 Peptide synthesis experiment on membrane using various amino acids and activators
- Example 3-1-1 Removal of Fmoc group on Pro supported on membrane Using the peptide-supported membrane disk (compound SS03) already prepared in Example 1-2-1, the Fmoc group was removed according to the method described in Reference Example 2-1-1 to obtain compound SS13. .
- Example 3-1-2 Extension reaction of Fmoc-protected amino acids to Pro supported on membrane Using the membrane (compound SS13) obtained in Example 3-1-1, an extension reaction of Fmoc-Asp(OPis)-OH to Pro on the membrane was performed under reaction conditions in which DIC was changed to tBEC.
- a solution of Fmoc-Asp(OPis)-OH (0.62 mol/L) and an activator (0.194 mol/L or 0.387 mol/L) dissolved in DMF and tBEC (stock solution) were mixed at 10:1.355.
- Example 3-1-3 Excision and analysis of various peptides supported on membrane The membrane obtained in Example 3-1-2 was subjected to peptide excision using the method described in Example 1-2. The production of a target peptide (compound SS14*) and a peptide (compound SS15*) in which Fmoc-Gly-OH was extended instead of the desired Fmoc-protected amino acid was confirmed.
- Reference Example 3-1-4 Extension reaction of Fmoc-protected amino acid to MePhe supported on membrane under DIC usage conditions
- the membrane obtained in Reference Example 2-1-1 (compound SS08) was used to perform the reaction in Reference Example 2-3-1.
- the extension reaction of Fmoc-Asp(OPis)-OH to MePhe on the membrane was performed with reference to the conditions.
- Table 18 a solution of Fmoc-Asp(OPis)-OH and Oxyma dissolved in DMF and DIC (undiluted solution) were mixed, and after standing for 15 minutes, the solution was obtained in Reference Example 2-1-1.
- 1.2 ⁇ L was added to the prepared membrane (compound SS08), and the mixture was allowed to stand at room temperature for 30 minutes. The subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 3-1-5 Extension reaction of Fmoc-protected amino acid to MePhe supported on membrane Using the membrane (compound SS08) obtained in Reference Example 2-1-1, the reaction of Example 2-7-3 was carried out.
- the extension reaction of Fmoc-Asp(OPis)-OH to MePhe on the membrane was carried out using various carbodiimides synthesized in Example 1-4 with reference to the reaction conditions. According to Table 18 below, a solution of Fmoc-Asp(OPis)-OH and Oxyma dissolved in DMF and various carbodiimides (undiluted solution) were mixed, and after standing for 15 minutes, the solution was obtained in Reference Example 2-1-1. 1.2 ⁇ L was added to the prepared membrane (compound SS08) and allowed to stand at room temperature for 30 minutes. The subsequent steps were carried out in the same manner as in Reference Example 2-1.
- Example 3-1-6 Excision and analysis of various peptides supported on membrane The membranes obtained in Reference Example 3-1-4 and Example 3-1-5 were subjected to the procedures described in Example 1-2. The peptide was excised using the method, and the production of a target peptide (compound SS37*) and a peptide (compound SS10*) in which Fmoc-Gly-OH was extended instead of the desired Fmoc-protected amino acid was confirmed.
- LCMS (ESI) m/z 648.5 [M+H] + Retention time: 3.80 minutes (Analysis conditions SQDAA05long)
- the extension efficiency was calculated according to the formula described in Example 2-5. The results are shown in Table 19 below.
- Example 3-2 Peptide synthesis experiment on membrane using peptide synthesizer
- the preferred reaction conditions for on-membrane peptide synthesis identified in Example 2 were applied to synthesis on an automatic synthesizer.
- the Fmoc method was used using a peptide synthesizer (Multipep RS; manufactured by Intavis).
- the detailed operation procedure was carried out in the following manner according to the manual attached to the synthesizer.
- double coupling was performed using an automatic synthesizer. For example, if the elongation efficiency is about 90% with single coupling, it is expected that the elongation efficiency will be about 99% by performing double coupling.
- Solution 1 was prepared by dissolving the extending Fmoc-protected amino acid (0.63 mol/L) and HOAt, Oxyma, or HOOBt (0.198 mol/L or 0.397 mol/L) in DMF. DsBC was used as solution 2 as it was.
- solution 3 was prepared by dissolving Fmoc-Gly-OH (0.6 mol/L) and HOAt (0.375 mol/L) in NMP.
- Solution 4 was prepared by mixing DIC (0.71 mol/L) and DMF.
- Example 1-2-1 Compound SS02
- CelluSpots 384 frame with acid stable discs manufactured by Intavis
- Solutions 1 to 4 were set in the peptide synthesizer, and automatic synthesis by the peptide synthesizer was started.
- Glycine capping process Next, solutions 3 and 4 were mixed at a ratio of 5:6 in the mixing vial of the synthesizer, left to stand for 15 minutes, and then 3.0 ⁇ L was added to each membrane disk and reacted for 40 minutes at room temperature. After performing glycine capping by doing this, the solution was discharged. Thereafter, the above elongation reaction of Fmoc-Gly-OH was performed again. It was then washed seven times with DMF (25 ⁇ L per membrane disk) and dried under vacuum for 10 minutes.
- Example 3-2 The results of Example 3-2 are shown in Table 20 below. No precipitation of DsBC-derived urea was observed in any of the substrates, and automatic synthesis using a peptide synthesizer was possible.
- Example 3-3 Experiment for synthesizing cyclic peptides on a membrane using a peptide synthesizer The preferred reaction conditions for peptide synthesis on a membrane identified in Example 2 were applied to synthesis using an automatic synthesizer, and cyclic peptides were synthesized in parallel. Synthesis was performed.
- Example 3-3-1 Peptide extension on membrane using a peptide synthesizer Referring to the reaction conditions of Examples 1-2 and 3-2, peptide extension was carried out using an automatic synthesizer to obtain the sequences listed in Table 21 below. was extended.
- the Fmoc method was used using a peptide synthesizer (Multipep RS; manufactured by Intavis). The detailed operation procedure was carried out in the following manner according to the manual attached to the synthesizer. In addition, in order to obtain stable and high elongation efficiency even if the type of Fmoc-protected amino acid was different, double coupling was performed using an automatic synthesizer. In order to adjust the number of reaction points on the membrane during the elongation of the first residue, Fmoc-Photo-Linker (0.072 mol/L), 4-phenoxybutyric acid (0.22 mol/L) and HOBt (0.181 mol) were added. /L) was dissolved in DMF to prepare solution 1.
- DIC was used as solution 2 as it was.
- Solution 3 was prepared in this manner. The combinations are listed in Table 22 below.
- DsBC was used as solution 4 as it was.
- CelluSpots 384 frame with acid stable discs (manufactured by Intavis) was set in a peptide synthesizer. Solutions 1 to 4 were set in the peptide synthesizer, and automatic synthesis by the peptide synthesizer was started.
- De-Fmoc step [1st residue] This operation was omitted since no Fmoc group was present at the N-terminus on the membrane.
- a DMF solution (2% v/v) of DBU was added at 6.0 ⁇ L per membrane disk, and the Fmoc group was deprotected at room temperature. After adding 6.0 ⁇ L, the reaction was carried out for 15 minutes, and then the solution was discharged. Subsequently, it was washed 7 times with DMF (37.5 ⁇ L per membrane disk) and 6 times with ethanol (37.5 ⁇ L per membrane disk), and dried under vacuum for 15 minutes.
- condensation reaction was carried out one more time for 30 minutes, and then washed 7 times with DMF (37.5 ⁇ L per membrane disk) and 5 times with ethanol (37.5 ⁇ L per membrane disk) for 15 minutes under vacuum. Dry.
- Example 3-3-2 Deprotection, cyclization, excision, and analysis of various peptides on the membrane Using the membrane obtained in Example 3-3-1 (compounds SS38 to SS46), deprotection reaction, cyclization, and analysis of various peptides were performed. The reaction, excision from the membrane, and analysis were performed, and the production of the target peptides (compounds SS47 to SS55) listed in Table 23 below was confirmed.
- each membrane disk was washed twice with 100 ⁇ L of NMP, and then 100 ⁇ L of DIPEA in NMP solution (60 mM) was added and allowed to stand at room temperature for 5 minutes. The solution was drained and subsequently washed once with 100 ⁇ L of NMP and three times with DCM and air dried.
- the purity of the target peptide was calculated from the following formula.
- Purity (%) (UV area value of target peptide) / (sum of UV area values of all peaks excluding background and peaks derived from impurities contained in Fmoc-PEG6-OH) x 100 Note that the impurities contained in Fmoc-PEG6-OH are presumed to be compounds in which the Fmoc group is oxidized and is no longer deprotected.
- Example 3-3 The results of Example 3-3 are shown in Table 24 below.
- Example 4 Experiment to examine the range of applicable carriers In this experiment, the reaction conditions according to the method for synthesizing peptides containing N-substituted amino acids (WO2018/225851) and the peptide synthesis on the membrane specified in Example 2 were used. On-resin peptide synthesis experiments were performed using preferred reaction conditions.
- Cl-Trt (2-Cl) resin (1.25-1.60 mmol/g, 100-200 mesh, 1% DVB) was purchased from Watanabe Chemical Industry Co., Ltd. or SUNRESIN.
- Example 4-1 Synthesis of Fmoc-Asp(O-Trt(2-Cl)-resin)-NMe2
- Example 4-1-1 Synthesis of (3S)-4-(dimethylamino)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid (Fmoc-Asp-NMe2, SS18)
- (3S)-4-(dimethylamino)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid was synthesized according to the above scheme.
- Example 4-1-2 (3S)-2-methylpropan-2-yl-4-(dimethylamino)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoate (Fmoc- Synthesis of Asp(OtBu)-NMe2, compound SS18a) The synthesis was carried out starting with Fmoc-Asp(OtBu)-OH (25.0 g, 60.8 mmol) purchased from a commercial supplier.
- Example 4-1-3 Synthesis of (3S)-4-(dimethylamino)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid (Fmoc-Asp-NMe2, compound SS18)
- the crude product of compound SS18a (29.8 g) and TFE (270 mL) were added to a reaction vessel, and then a 4 mol/L hydrochloric acid dioxane solution (15.2 mL, 60.8 mmol) was added dropwise, and the reaction solution was diluted at room temperature for 1 hour. Stir for hours.
- reaction solution was diluted with TBME (500 mL) and then extracted with 5% aqueous sodium carbonate solution (600 mL).
- An 85% aqueous phosphoric acid solution (40-50 mL) was added to the resulting aqueous layer to make it acidic to around pH 2-3, and the aqueous layer was extracted with TBME (400 mL).
- TBME 400 mL
- the organic layer was dried over sodium sulfate. After removing the drying material by filtration, the filtrate was concentrated under reduced pressure to obtain 21.4 g (yield: 92%) of compound SS18.
- LCMS (ESI) m/z 383.2 [M+H] + Retention time: 0.66 minutes (analysis conditions analysis conditions SQDFA05_2)
- Example 4-1-4 (3S)-4-(dimethylamino)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoate-2-chlorotrityl resin (Fmoc-Asp(O -Trt(2-Cl)-resin)-NMe2, synthesis of compound SS19) 2-chlorotrityl chloride resin (1.44 mmol/g, 39.0 g, 56.2 mmol) and DCM (390 mL) were placed in a reaction vessel equipped with a filter, and the mixture was shaken at room temperature for 20 minutes.
- 2-chlorotrityl chloride resin (1.44 mmol/g, 39.0 g, 56.2 mmol) and DCM (390 mL) were placed in a reaction vessel equipped with a filter, and the mixture was shaken at room temperature for 20 minutes.
- the obtained compound SS19 (10.48 mg) was placed in a reaction container, DMF (4.0 mL) was added, and the mixture was shaken at room temperature for 30 minutes. Thereafter, DBU (40 ⁇ L) was added and shaken at 30° C. for 15 minutes. Thereafter, DMF was added so that the reaction mixture became 10.0 mL, and 80 ⁇ L of the solution was diluted with DMF (920 ⁇ L).
- the obtained diluted solution was analyzed by LC/MS (analysis conditions SQDFA05_1, injection volume: 5 ⁇ L), and from the UVarea value of dibenzofulvene (UVarea value at 294 nm: 4929.82, UVarea value at 304 nm: 4428.76), the compound The amount of SS19 supported was calculated to be 0.469 mmol/g.
- Example 4-2 Peptide synthesis experiment under different reaction conditions on resin
- Example 4-2-1 Preparation of compound SS20 (MeVal-Asp(O-Trt(2-Cl)-resin)-NMe2)
- Compound SS20 was prepared by the Fmoc method using a peptide synthesizer (Multipep RS; manufactured by Intavis) according to the method for synthesizing peptides containing N-substituted amino acids (WO2018/225851). For detailed operating procedures, the manual included with the synthesizer was followed.
- Multipep RS manufactured by Intavis
- Solution 1 was prepared by dissolving Fmoc-MeVal-OH (0.6 mol/L) constituting the target peptide and HOAt (0.375 mol/L) as a carboxylic acid activator in NMP.
- Solution 2 was prepared by mixing DIC (0.71 mol/L) and DMF.
- Solution 1 and Solution 2 were set in a peptide synthesizer, and automatic synthesis by the peptide synthesizer was started.
- the solution was drained from the frit and the resin was subsequently washed twice with DMF (0.7 mL per column).
- Extension process solution 1 (0.3 mL) and solution 2 (0.36 mL) were mixed in the mixing vial of the synthesizer, then added to the resin, the solid phase reaction vessel was heated to 40 °C, and the reaction was carried out for 2.5 hours. After performing a condensation reaction between the amino group on the resin and the Fmoc-protected amino acid, the solution was discharged from the frit. The resin was then washed three times with DMF (0.7 mL per column).
- Example 4-2-2 Extension reaction of Fmoc-MeVal-OH to MeVal supported on resin under various reaction conditions The elongation reaction of Fmoc-MeVal-OH to MeVal supported on the resin was performed under the reaction conditions according to the method for synthesizing peptides containing N-substituted amino acids (WO2018/225851) or the peptide synthesis on the membrane specified in Example 2. Compound SS21 was synthesized using the reaction conditions preferred in .
- Solution 1 was prepared by dissolving Fmoc-MeVal-OH (0.6 mol/L) and HOAt (0.375 mol/L) in NMP.
- Solution 2 was prepared by mixing DIC (0.71 mol/L) and DMF.
- Solution 1 and Solution 2 were set in a peptide synthesizer, and automatic synthesis by the peptide synthesizer was started. After mixing solution 1 (0.3 mL) and solution 2 (0.36 mL) in the mixing vial of the synthesizer, add them to the resin, heat the solid phase reaction container to 40 ° C., and react for 2.5 hours. After performing a condensation reaction between the amino groups on the resin and the Fmoc-protected amino acid, the solution was discharged from the frit. The resin was then washed three times with DMF (0.7 mL per column).
- Example 4-2-2b Extension reaction of Fmoc-MeVal-OH to MeVal supported on resin under high reagent concentration reaction conditions using DsBC MeVal- Asp(O -Trt(2-Cl)-resin)-NMe2 (compound SS20, 100 mg per column), and by increasing the reagent concentration using DsBC with reference to the reaction conditions of Example 2-4, Example 2
- the extension reaction of Fmoc-MeVal-OH with respect to MeVal on the resin was carried out under the reaction conditions described in No. 2 to No. 5 of Section 4.
- Solution 1 (601 ⁇ L) prepared by dissolving Fmoc-MeVal-OH (0.63 mol/L) and HOAt (0.198 mol/L or 0.397 mol/L) in DMF and DsBC (undiluted solution) (98.7 ⁇ L) After mixing, 660 ⁇ L of the mixed solution was added to the resin, the solid phase reaction vessel was heated to 40°C or 50°C, and the reaction was carried out for 2.5 hours, resulting in a condensation reaction between the amino groups on the resin and the Fmoc-protected amino acid. I did it. The solution was then drained from the frit. The resin was then washed three times with DMF (0.7 mL per column).
- Example 4-2-3 Preparation of compound SS22 Using the compound SS21 obtained in Reference Example 4-2-2a or Example 4-2-2b and following the method for synthesizing peptides containing N-substituted amino acids (WO2018/225851), Fmoc-Gly for MeVal on the resin was used. -OH extension reaction was performed. This example was carried out by the Fmoc method using a peptide synthesizer (Multipep RS; manufactured by Intavis). For detailed operating procedures, the manual included with the synthesizer was followed.
- a peptide synthesizer Multipep RS; manufactured by Intavis
- Solution 1 was prepared by dissolving Fmoc-Gly-OH (0.6 mol/L) constituting the target peptide and HOAt (0.375 mol/L) as a carboxylic acid activator in NMP.
- Solution 2 was prepared by mixing DIC (0.71 mol/L) and DMF.
- Compound SS21 (100 mg per column) prepared in Reference Example 4-2-2a or Example 4-2-2b was added to a solid phase reaction vessel, and the vessel was set in a peptide synthesizer.
- Solution 1 and Solution 2 were set in a peptide synthesizer, and automatic synthesis by the peptide synthesizer was started.
- Extension process solution 1 (0.3 mL) and solution 2 (0.36 mL) were mixed in the mixing vial of the synthesizer, then added to the resin, the solid phase reaction vessel was heated to 40 °C, and the reaction was carried out for 2.5 hours. After performing a condensation reaction between the amino group on the resin and the Fmoc-protected amino acid, the solution was discharged from the frit. The resin was then washed three times with DMF (0.7 mL per column). The column was further washed four times with DCM (1.0 mL per column), dried, and then used for subsequent studies.
- the peptide was excised from a portion of the obtained resin using a TFE/DCM solution (1/1 (v/v)) containing DIPEA (0.042 mol/L).
- the excised solution was analyzed by LCMS, the production of the target peptide (compound SS22*) was confirmed.
- the production of a compound SS23* lacking one MeVal in addition to the target peptide was also confirmed.
- Example 4 The results of Example 4 are shown in Table 25 below.
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Abstract
Description
[A1] 固相法によるペプチド化合物の製造方法であって、
固相に担持された、アミノ基を有する第一のアミノ酸またはアミノ基を有する第一のペプチドを準備する準備工程;および
第一のアミノ酸または第一のペプチドと、保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のアミノ酸、または保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のペプチドとを、下記一般式(A)で表される少なくとも1種のカルボジイミド系縮合剤、
RA-N=C=N-RB ・・・(A)
(式中、RAはC4~C10第2級または第3級アルキルであり、RBはC2~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RAおよびRBにおける各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい。)
および添加剤の存在下で縮合させる縮合工程
を含む、前記方法。
[A2] RAはC4~C10第2級アルキルである、[A1]に記載の方法。
[A2-1] RAはC4~C8第2級アルキルである、[A1]に記載の方法。
[A2-2] RAは不斉炭素を有するC4~C8第2級または第3級アルキルである、[A1]に記載の方法。
[A2-3] RAは不斉炭素を有するC4~C8第2級アルキルである、[A1]に記載の方法。
[A2-4] RAは不斉炭素を有するC4~C6第2級アルキルである、[A1]に記載の方法。
[A2-5] RAは1-メチルヘプチル、1-メチルブチル、1-エチルプロピルまたはsec-ブチルである、[A1]に記載の方法。
[A2-6] RAはsec-ブチルである、[A1]に記載の方法。
[A3] RBはC3~C10第2級または第3級アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RBにおける各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい、[A1]または[A2]に記載の方法。
[A3-1] RBはC3~C10第2級または第3級アルキルである、[A1]または[A2]に記載の方法。
[A3-2] RBはC3~C10第2級もしくは第3級アルキル、またはC7~C14アリールアルキルである、[A1]または[A2]に記載の方法。
[A3-3] RBはC3~C10第2級アルキル、またはC7~C10アリールアルキルである、[A1]または[A2]に記載の方法。
[A3-4] RBはC3~C6第2級アルキルである、[A1]または[A2]に記載の方法。
[A3-5] RBは1-メチルベンジル、1-メチルヘプチル、1-メチルブチル、1-エチルプロピルまたはsec-ブチルである、[A1]または[A2]に記載の方法。
[A3-6] RBはsec-ブチルである、[A1]または[A2]に記載の方法。
[A4] RAはC4~C8第2級または第3級アルキルであり、RBはC4~C10第2級または第3級アルキル、またはC7~C14アリールアルキルである、[A1]に記載の方法。
[A4-1] RAはC4~C8第2級アルキルであり、RBはC4~C10第2級アルキル、またはC7~C14アリールアルキルである、[A1]に記載の方法。
[A4-2] RAはC4~C6第2級アルキルであり、RBはC4~C8第2級アルキル、またはC7~C10アリールアルキルである、[A1]に記載の方法。
[A5] RAは不斉炭素を有するC4~C8第2級または第3級アルキルであり、RBはC3~C10第2級または第3級アルキルである、[A1]に記載の方法。
[A5-1] RAは不斉炭素を有するC4~C8第2級アルキルであり、RBはC4~C10第2級アルキル、またはC7~C14アリールアルキルである、[A1]に記載の方法。
[A5-2] RAは不斉炭素を有するC4~C8第2級アルキルであり、RBはC4~C10第2級アルキル、またはC7~C10アリールアルキルである、[A1]に記載の方法。
[A5-3] RAは不斉炭素を有するC4~C6第2級アルキルであり、RBはC4~C8第2級アルキル、またはC7~C10アリールアルキルである、[A1]に記載の方法。
[A6] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)、およびN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)からなる群より選択される少なくとも1種を含む、[A1]~[A5]のいずれかに記載の方法。
[A6-1] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、またはN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)からなる群より選択される少なくとも1種を含む、[A1]~[A5]のいずれかに記載の方法。
[A6-2] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、またはN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)である、[A1]~[A5]のいずれかに記載の方法。
[A6-3] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)である、[A1]~[A5]のいずれかに記載の方法。
[A6-4] カルボジイミド系縮合剤が、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)である、[A1]~[A5]のいずれかに記載の方法。
[A6-5] カルボジイミド系縮合剤が、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)である、[A1]~[A5]のいずれかに記載の方法。
[A6-6] カルボジイミド系縮合剤が、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)である、[A1]~[A5]のいずれかに記載の方法。
[A6-7] カルボジイミド系縮合剤が、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)である、[A1]~[A5]のいずれかに記載の方法。
[A6-8] カルボジイミド系縮合剤が、N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)である、[A1]~[A5]のいずれかに記載の方法。
[A7] 添加剤が、1-ヒドロキシ-7-アザベンゾトリアゾール(HOAt)、1-ヒドロキシベンゾトリアゾール(HOBt)、3,4-ジヒドロ-3-ヒドロキシ-4-オキソ-1,2,3-ベンゾトリアジン(HOOBt)、シアノ(ヒドロキシイミノ)酢酸エチル(Oxyma)、および5-(ヒドロキシイミノ)-1,3-ジメチルピリミジン-2,4,6(1H,3H,5H)-トリオン(Oxyma B)からなる群より選択される少なくとも1種である、[A1]~[A6]のいずれかに記載の方法。
[A8] 添加剤が、HOAt、HOOBt、およびOxymaからなる群より選択される少なくとも1種である、[A1]~[A6]のいずれかに記載の方法。
[A9] 添加剤が、HOAt、HOOBt、またはOxymaである、[A1]~[A6]のいずれかに記載の方法。
[A10] 縮合工程が溶媒中で行われ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.4mol/L以上、0.5mol/L以上、0.6mol/L以上、または0.7mol/L以上である、[A1]~[A9]のいずれかに記載の方法。
[A11] 縮合工程が溶媒中で行われ、溶媒中におけるカルボジイミド系縮合剤の濃度が、4.0mol/L以下、3.0mol/L以下、2.0mol/L以下、または1.0mol/L以下である、[A1]~[A10]のいずれかに記載の製造方法。
[A12] 縮合工程が溶媒中で行われ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.4~4.0mol/L、0.5~3.0mol/L、0.6~2.0mol/L、または0.7~1.0mol/Lである、[A1]~[A11]のいずれかに記載の製造方法。
[A13] 縮合工程が溶媒中で行われ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.7~1.0mol/Lである、[A1]~[A11]のいずれかに記載の製造方法。
[A14] 固相がメンブランまたは固相合成用樹脂である、[A1]~[A13]のいずれかに記載の製造方法。
[A15] 固相がメンブランである、[A1]~[A13]のいずれかに記載の製造方法。
[A16] メンブランがセルロースメンブラン、ポリプロピレンメンブラン、またはポリアミノエチルメタクリルアミドメンブランである、[A15]に記載の方法。
[A17] メンブランがセルロースメンブランである、[A15]に記載の方法。
[A18] 固相が固相合成用樹脂である、[A1]~[A13]のいずれかに記載の製造方法。
[A19] 固相合成用樹脂が、クロロトリチル(CTC)レジン、トリチル(Trt)レジン、SASRINレジン、Rinkアミドレジン、Merrifieldレジン、またはWangレジンである、[A18]に記載の方法。
[A20] 固相合成用樹脂が、クロロトリチル(CTC)レジンである、[A18]に記載の方法。
[A21] 固相と、第一のアミノ酸または第一のペプチドとが、光開裂性部位、ジスルフィド結合、または酸不安定部位を介して結合されている、[A1]~[A20]のいずれかに記載の方法。
[A21-1] 固相と、第一のアミノ酸または第一のペプチドとが、光開裂性部位を介して結合されている、[A1]~[A20]のいずれかに記載の方法。
[A21-2] 固相と、第一のアミノ酸または第一のペプチドとが、ジズルフィド結合を介して結合されている、[A1]~[A20]のいずれかに記載の方法。
[A21-3] 固相と、第一のアミノ酸または第一のペプチドとが、酸不安定部位を介して結合されている、[A1]~[A20]のいずれかに記載の方法。
[A22] 光開裂性部位がニトロベラトリルオキシカルボニル残基、またはクマリン残基を有する、[A21-1]に記載の方法。
[A22-1] 光開裂性部位がニトロベラトリルオキシカルボニル残基である、[A21-1]に記載の方法。
[A23] 酸不安定部位が、トリチルエステル構造、クロロトリチルエステル構造、アルコキシベンジルエーテル構造、トリアルコキシベンジルアミノカルボニル構造、ジアルコキシフェニル-アルコキシフェニルメチルアミノカルボニル構造、またはアルコキシキサンテン-9-イルアミノカルボニル構造を有する、[A21-3]に記載の方法。
[A23-1] 酸不安定部位が、クロロトリチルエステル構造を有する、[A21-3]に記載の方法。
[A24] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0当量以上、1.1当量以上、または1.2当量以上のカルボジイミド系縮合剤を用いる、[A1]~[A23]のいずれかに記載の方法。
[A25] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、5.0当量以下、4.0当量以下、3.0当量以下、2.0当量以下、または1.5当量以下のカルボジイミド系縮合剤を用いる、[A1]~[A24]のいずれかに記載の方法。
[A26] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0~5.0当量、1.1~4.0当量、1.1~3.0当量、1.2~2.0当量、または1.2~1.5当量のカルボジイミド系縮合剤を用いる、[A1]~[A25]のいずれかに記載の方法。
[A27] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.2~1.5当量のカルボジイミド系縮合剤を用いる、[A1]~[A25]のいずれかに記載の方法。
[A28] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.01当量、0.05当量、0.1当量、0.2当量以上、または0.3当量以上の添加剤を用いる、[A1]~[A27]のいずれかに記載の方法。
[A29] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0当量以下、0.9当量以下、0.8当量以下、または0.7当量以下の添加剤を用いる、[A1]~[A28]のいずれかに記載の方法。
[A30] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.05~1.0当量、0.1~0.9当量、0.2~0.8当量、または0.3~0.7当量の添加剤を用いる、[A1]~[A29]のいずれかに記載の方法。
[A31] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.3~0.7当量の添加剤を用いる、[A1]~[A29]のいずれかに記載の方法。
[A32] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、非天然アミノ酸である、[A1]~[A31]のいずれかに記載の方法。
[A33] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、α,α-ジ置換アミノ酸、β-分岐アミノ酸、またはN-アルキルアミノ酸(ただし、N-アルキルアミノ酸におけるアルキルはC3~C6シクロアルキル、C2~C6アルケニル、C2~C6アルキニル、またはC6~C10アリールより独立して選択される1つまたは複数の基によって置換されていてもよい)である、[A1]~[A32]のいずれかに記載の方法。
[A34] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、アルキルの炭素数が1~8であるN-アルキルアミノ酸(ただし、アルキルは、ハロゲン、シアノ、C3~C6シクロアルキル、C2~C6アルケニル、C2~C6アルキニル、またはC6~C10アリールより独立して選択される1つまたは複数の基によって置換されていてもよい)である、[A1]~[A32]のいずれかに記載の方法。
[A35] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、N-アルキルアミノ酸、アルキルの炭素数が1~8であるN-アルキルアミノ酸、アルキルの炭素数が1~6であるN-アルキルアミノ酸、アルキルの炭素数が1~3であるN-アルキルアミノ酸、またはN-メチルアミノ酸である、[A1]~[A32]のいずれかに記載の方法。
[A36] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、N-メチルアミノ酸である、[A1]~[A32]のいずれかに記載の方法。
[A37] 第二のアミノ酸、または第二のペプチドのC末端のアミノ酸が、非天然アミノ酸である、[A1]~[A36]のいずれかに記載の方法。
[A38] 第二のアミノ酸、または第二のペプチドのC末端のアミノ酸が、α,α-ジ置換アミノ酸、β-分岐アミノ酸、またはN-アルキルアミノ酸である、[A1]~[A37]のいずれかに記載の方法。
[A39] 保護アミノ基における保護基が、下記式(1)で表される基である、[A1]~[A38]のいずれかに記載の方法;
[A40] 保護アミノ基における保護基が、9-フルオレニルメチルオキシカルボニル(Fmoc)基、Fmoc(2,7tb)基、Fmoc(1Me)基、Fmoc(2F)基、Fmoc(2,7Br)基、mio-Fmoc基、dio-Fmoc基、tdf-Fmoc基、Fmoc(2TMS)基、Fmoc(2so3h)基、sm-Fmoc基、またはrm-Fmoc基である、[A1]~[A38]のいずれかに記載の方法。
[A41] 保護アミノ基における保護基が、Fmoc基である、[A1]~[A38]のいずれかに記載の方法。
[A42] 縮合工程が溶媒中で行われる、[A1]~[A41]のいずれかに記載の方法。
[A43] 溶媒は、アミド系溶媒、ウレア系溶媒、エーテル系溶媒、ハロゲン系溶媒、ニトリル系溶媒、およびベンゼン系溶媒からなる群より選択される少なくとも1種を含む、[A42]に記載の方法。
[A44] 溶媒がアミド系溶媒である、[A43]に記載の方法。
[A45] アミド系溶媒は、N,N-ジメチルホルムアミド(DMF)、N-メチル-2-ピロリドン(NMP)、ジメチルアセトアミド(DMA)、N-エチル-2-ピロリドン(NEP)、N-ブチル-2-ピロリドン(NBP)、およびホルムアミドからなる群より選択される、[A44]に記載の方法。
[A46] 溶媒がウレア系溶媒である、[A43]に記載の方法。
[A47] ウレア系溶媒は、1,3-ジメチル-2-イミダゾリジノン(DMI)、およびN,N’-ジメチルプロピレン尿素(DMPU)からなる群より選択される、[A46]に記載の方法。
[A48] 溶媒がエーテル系溶媒である、[A43]に記載の方法。
[A49] エーテル系溶媒は、テトラヒドロフラン、2-メチルテトラヒドロフラン、4-メチルテトラヒドロピランからなる群より選択される、[A48]に記載の方法。
[A50] 溶媒がハロゲン系溶媒である、[A43]に記載の方法。
[A51] ハロゲン系溶媒は、ジクロロメタン、1,2-ジクロロエタンからなる群より選択される、[A50]に記載の方法。
[A52] 溶媒がニトリル系溶媒である、[A43]に記載の方法。
[A53] ニトリル系溶媒は、アセトニトリルである、[A52]に記載の方法。
[A54] 溶媒がベンゼン系溶媒である、[A43]に記載の方法。
[A55] ベンゼン系溶媒は、ベンゼン、トルエン、キシレンからなる群より選択される、[A54]に記載の方法。
[A56] 縮合工程が、0℃~100℃、10℃~80℃、10℃~60℃、10℃~50℃、10℃~40℃、10℃~35℃、15℃~60℃、20℃~60℃、20℃~40℃、または25℃~40℃で行われる、[A1]~[A55]のいずれかに記載の方法。
[A57] 縮合工程が、20℃~60℃で行われる、[A1]~[A55]のいずれかに記載の方法。
[A58] 縮合工程を、2回以上繰り返す、[A1]~[A57]のいずれかに記載の方法。
[A59] 縮合工程を、2回繰り返す、[A1]~[A57]のいずれかに記載の方法。
[A60] 縮合工程の後に、固相に担持された、第二のアミノ酸もしくは第二のペプチドにおける保護アミノ基および/または保護ヒドロキシ基の保護基を脱保護する脱保護工程を更に含む、[A1]~[A59]のいずれかに記載の方法。
[A61] 縮合工程と脱保護工程との間に、固相を洗浄する洗浄工程を更に含む、[A60]に記載の方法。
[A62] 縮合工程と脱保護工程を複数回繰り返す(ただし、複数回の縮合工程で用いられる複数の第二のアミノ酸および/または第二のペプチドは、それぞれ同一であっても異なっていてもよい)、[A60]または[A61]に記載の方法。
[A63] [A1]~[A62]のいずれかに記載の方法における、上記式(A)で表されるカルボジイミド系縮合剤の使用。
[A64] [A1]~[A62]のいずれかに記載の方法における、DsBCの使用。
上記一般式(A)におけるRAおよびRBの組み合わせに関して、反応系中に活性エステルが長時間高濃度を維持することが可能となり、縮合反応の工程において、反応変換率をより向上させることができる観点からは、[A4]~[A4-2]が好ましく、高濃度においてもカルボジイミド由来のウレアの析出を高度に回避することにより、自動合成においても効率良くアミド化できる観点からは、[A5]~[A5-3]が好ましい。
[A1’] 液相法によるペプチド化合物の製造方法であって、
アミノ基を有する第一のアミノ酸またはアミノ基を有する第一のペプチドを準備する準備工程;および
第一のアミノ酸または第一のペプチドと、保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のアミノ酸、または保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のペプチドとを、上記一般式(A)で表される少なくとも1種のカルボジイミド系縮合剤および添加剤の存在下で縮合させる縮合工程
を含む、前記方法。
かかる方法によれば、高反応変換率で、目的のペプチド化合物を得ることができる。
[B1] 固相法によるペプチド化合物の製造方法であって、
固相に担持された、N-アルキルアミノ基を有する第一のアミノ酸、またはN末端にN-アルキルアミノ基を有する第一のペプチドを準備する準備工程;および
第一のアミノ酸または第一のペプチドと、保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のアミノ酸、または保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のペプチドとを、下記一般式(A’)で表される少なくとも1種のカルボジイミド系縮合剤、および
RA’-N=C=N-RB’ ・・・(A’)
(式中、RA’はC3~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RB’はC1~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RA’およびRB’における各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい。ただし、RA’における総炭素数は4以上である。)
添加剤の存在下、溶媒中で縮合させ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.4~4.0mol/Lである縮合工程
を含む、前記方法。
[B2] RA’はC4~C10アルキル、C4~C6アルキル、またはC4アルキルである、[B1]に記載の方法。
[B3] RB’はC1~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルである、[B1]または[B2]に記載の方法。
[B3―1] RB’はC1~C10アルキルである、[B1]または[B2]に記載の方法。
[B3―2] RB’はC2~C6アルキルである、[B1]または[B2]に記載の方法。
[B3―3] RB’はC4アルキルである、[B1]または[B2]に記載の方法。
[B4] カルボジイミド系縮合剤が、DsBC、1-tert-ブチル-3-エチルカルボジイミド(tBEC)、ジtert-ブチルカルボジイミド(DtBC)、1-(3-ジメチルアミノプロピル)-3-エチルカルボジイミド(EDCI)、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)、およびN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)からなる群より選択される少なくとも1種である、[B1]~[B3]のいずれかに記載の方法。
[B4-1] カルボジイミド系縮合剤が、DsBC、1-tert-ブチル-3-エチルカルボジイミド(tBEC)、ジtert-ブチルカルボジイミド(DtBC)、および1-(3-ジメチルアミノプロピル)-3-エチルカルボジイミド(EDCI)からなる群より選択される少なくとも1種である、[B1]~[B3]のいずれかに記載の方法。
[B5] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)、およびN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)からなる群より選択される少なくとも1種を含む、[B1]~[B3]のいずれかに記載の方法。
[B5-1] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、またはN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)からなる群より選択される少なくとも1種を含む、[B1]~[B3]のいずれかに記載の方法。
[B5-2] カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、またはN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)である、[B1]~[B3]のいずれかに記載の方法。
[B5-3] カルボジイミド系縮合剤が、DsBCである、[B1]~[B3]のいずれかに記載の方法。
[B5-4] カルボジイミド系縮合剤が、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)である、[B1]~[B3]のいずれかに記載の方法。
[B5-5] カルボジイミド系縮合剤が、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)である、[B1]~[B3]のいずれかに記載の方法。
[B5-6] カルボジイミド系縮合剤が、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)である、[B1]~[B3]のいずれかに記載の方法。
[B5-7] カルボジイミド系縮合剤が、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)である、[B1]~[B3]のいずれかに記載の方法。
[B5-8] カルボジイミド系縮合剤が、N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)である、[B1]~[B3]のいずれかに記載の方法。
[B6] 添加剤が、HOAt、HOBt、HOOBtおよびOxymaからなる群より選択される少なくとも1種である、[B1]~[B5]のいずれかに記載の方法。
[B7] 添加剤が、HOAt、HOOBt、およびOxymaからなる群より選択される少なくとも1種である、[B1]~[B5]のいずれかに記載の方法。
[B8] 添加剤が、HOAt、HOOBt、またはOxymaである、[B1]~[B5]のいずれかに記載の方法。
[B9] 溶媒中におけるカルボジイミド系縮合剤の濃度が、0.5mol/L以上、0.6mol/L以上、または0.7mol/L以上である、[B1]~[B8]のいずれかに記載の方法。
[B10] 縮合工程において、溶媒中におけるカルボジイミド系縮合剤の濃度が、3.0mol/L以下、2.0mol/L以下、または1.0mol/L以下である、[B1]~[B9]のいずれかに記載の製造方法。
[B11] 縮合工程において、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.5~3.0mol/L、0.6~2.0mol/L、または0.7~1.0mol/Lである、[B1]~[B10]のいずれかに記載の製造方法。
[B12] 縮合工程において、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.7~1.0mol/Lである、[B1]~[B10]のいずれかに記載の製造方法。
[B13] 固相がメンブランまたは固相合成用樹脂である、[B1]~[B12]のいずれかに記載の製造方法。
[B14] 固相がメンブランである、[B1]~[B12]のいずれかに記載の製造方法。
[B15] メンブランがセルロースメンブラン、ポリプロピレンメンブラン、またはポリアミノエチルメタクリルアミドメンブランである、[B14]に記載の方法。
[B16] メンブランがセルロースメンブランである、[B14]に記載の方法。
[B17] 固相が固相合成用樹脂である、[B1]~[B12]のいずれかに記載の製造方法。
[B18] 固相合成用樹脂が、クロロトリチル(CTC)レジン、トリチル(Trt)レジン、SASRINレジン、Rinkアミドレジン、Merrifieldレジン、またはWangレジンである、[B17]に記載の方法。
[B19] 固相合成用樹脂が、クロロトリチル(CTC)レジンである、[B17]に記載の方法。
[B20] 固相と、第一のアミノ酸または第一のペプチドとが、光開裂性部位、ジスルフィド結合、または酸不安定部位を介して結合されている、[B1]~[B19]のいずれかに記載の方法。
[B20-1] 固相と、第一のアミノ酸または第一のペプチドとが、光開裂性部位を介して担持されている、[B1]~[B19]のいずれかに記載の方法。
[B20-2] 固相と、第一のアミノ酸または第一のペプチドとが、ジスルフィド結合を介して結合されている、[B1]~[B19]のいずれかに記載の方法。
[B20-3] 固相と、第一のアミノ酸または第一のペプチドとが、酸不安定部位を介して結合されている、[B1]~[B19]のいずれかに記載の方法。
[B21] 光開裂性部位がニトロベラトリルオキシカルボニル残基、またはクマリン残基を有する、[B20-1]に記載の方法。
[B21-1] 光開裂性部位がニトロベラトリルオキシカルボニル残基である、[B20-1]に記載の方法。
[B22] 酸不安定部位が、トリチルエステル構造、クロロトリチルエステル構造、アルコキシベンジルエーテル構造、トリアルコキシベンジルアミノカルボニル構造、ジアルコキシフェニル-アルコキシフェニルメチルアミノカルボニル構造、またはアルコキシキサンテン-9-イルアミノカルボニル構造を有する、[B20-3]に記載の方法。
[B22-1] 酸不安定部位が、クロロトリチルエステル構造を有する、[B20-3]に記載の方法。
[B23] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0当量以上、1.1当量以上、または1.2当量以上のカルボジイミド系縮合剤を用いる、[B1]~[B22]のいずれかに記載の方法。
[B24] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、5.0当量以下、4.0当量以下、3.0当量以下、2.0当量以下、または1.5当量以下のカルボジイミド系縮合剤を用いる、[B1]~[B23]のいずれかに記載の方法。
[B25] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0~5.0当量、1.1~4.0当量、1.1~3.0当量、1.2~2.0当量、または1.2~1.5当量のカルボジイミド系縮合剤を用いる、[B1]~[B24]のいずれかに記載の方法。
[B26] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.2~1.5当量のカルボジイミド系縮合剤を用いる、[B25]に記載の方法。
[B27] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.01当量以上、0.05当量以上、0.1当量以上、0.2当量以上、または0.3当量以上の添加剤を用いる、[B1]~[B26]のいずれかに記載の方法。
[B28] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、1.0当量以下、0.9当量以下、0.8当量以下、または0.7当量以下の添加剤を用いる、[B1]~[B27]のいずれかに記載の方法。
[B29] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.05~1.0当量、0.1~0.9当量、0.2~0.8当量、または0.3~0.7当量の添加剤を用いる、[B1]~[B28]のいずれかに記載の方法。
[B30] 縮合工程において、第二のアミノ酸、または第二のペプチドに対して、0.3~0.7当量の添加剤を用いる、[B1]~[B28]のいずれかに記載の方法。
[B31] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、非天然アミノ酸である、[B1]~[B30]のいずれかに記載の方法。
[B32] 第一のアミノ酸のN-アルキルアミノ基におけるアルキル、または第一のペプチドのN末端のアミノ酸のN-アルキルアミノ基におけるアルキルが、C1~C10アルキル、C1~C6アルキル、またはC1~C3アルキルである(ここでのアルキルは、ハロゲン、シアノ、C1~C6アルコキシ、C3~C6シクロアルキル、C2~C6アルケニル、C2~C6アルキニル、またはC6~C10アリールより独立して選択される1つまたは複数の基によって置換されていてもよい)、[B1]~[B31]のいずれかに記載の方法。
[B33] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、アルキルの炭素数が1~8であるN-アルキルアミノ酸(ただし、アルキルは、ハロゲン、シアノ、C1~C6アルコキシ、C3~C6シクロアルキル、C2~C6アルケニル、C2~C6アルキニル、またはC6~C10アリールより独立して選択される1つまたは複数の基によって置換されていてもよい)である、[B1]~[B32]のいずれかに記載の方法。
[B34] 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、N-アルキルアミノ酸、アルキルの炭素数が1~8であるN-アルキルアミノ酸、1~6であるN-アルキルアミノ酸、アルキルの炭素数が1~3であるN-アルキルアミノ酸、またはN-メチルアミノ酸である、[B1]~[B32]のいずれかに記載の方法。
[B35] 第一のアミノ酸のN-アルキルアミノ基におけるアルキル、または第一のペプチドのN末端のアミノ酸のN-アルキルアミノ基におけるアルキルが、メチル基である、[B1]~[B34]のいずれかに記載の方法。
[B36] 第二のアミノ酸、または第二のペプチドのC末端のアミノ酸が、非天然アミノ酸である、[B1]~[B35]のいずれかに記載の方法。
[B37] 第二のアミノ酸、または第二のペプチドのC末端のアミノ酸が、α,α-ジ置換アミノ酸、β-分岐アミノ酸、またはN-アルキルアミノ酸である、[B1]~[B36]のいずれかに記載の方法。
[B38] 保護アミノ基における保護基が、下記式(1)で表される基である、[B1]~[B37]のいずれかに記載の方法;
[B39] 保護アミノ基における保護基が、Fmoc基、Fmoc(2,7tb)基、Fmoc(1Me)基、Fmoc(2F)基、Fmoc(2,7Br)基、mio-Fmoc基、dio-Fmoc基、tdf-Fmoc基、Fmoc(2TMS)基、Fmoc(2so3h)基、sm-Fmoc基、またはrm-Fmoc基である、[B1]~[B37]のいずれかに記載の方法。
[B40] 保護アミノ基における保護基が、Fmoc基である、[B1]~[B37]のいずれかに記載の方法。
[B41] 縮合工程が溶媒中で行われる、[B1]~[B40]のいずれかに記載の方法。
[B42] 溶媒は、アミド系溶媒、ウレア系溶媒、エーテル系溶媒、ハロゲン系溶媒、ニトリル系溶媒、およびベンゼン系溶媒からなる群より選択される少なくとも1種を含む、[B41]に記載の方法。
[B43] 溶媒がアミド系溶媒である、[B42]に記載の方法。
[B44] アミド系溶媒は、DMF、NMP、DMA、NEP、NBP、およびホルムアミドからなる群より選択される、[B43]に記載の方法。
[B45] 溶媒がウレア系溶媒である、[B42]に記載の方法。
[B46] ウレア系溶媒は、DMI、およびDMPUからなる群より選択される、[B45]に記載の方法。
[B47] 溶媒がエーテル系溶媒である、[B42]に記載の方法。
[B48] エーテル系溶媒は、テトラヒドロフラン、2-メチルテトラヒドロフラン、4-メチルテトラヒドロピランからなる群より選択される、[B47]に記載の方法。
[B49] 溶媒がハロゲン系溶媒である、[B42]に記載の方法。
[B50] ハロゲン系溶媒は、ジクロロメタン、1,2-ジクロロエタンからなる群より選択される、[B49]に記載の方法。
[B51] 溶媒がニトリル系溶媒である、[B42]に記載の方法。
[B52] ニトリル系溶媒は、アセトニトリルである、[B51]に記載の方法。
[B53] 溶媒がベンゼン系溶媒である、[B42]に記載の方法。
[B54] ベンゼン系溶媒は、ベンゼン、トルエン、キシレンからなる群より選択される、[B53]に記載の方法。
[B55] 縮合工程が、0℃~100℃、10℃~80℃、10℃~60℃、10℃~50℃、10℃~40℃、10℃~35℃、15℃~60℃、20℃~60℃、20℃~40℃、または25℃~40℃で行われる、[B1]~[B54]のいずれかに記載の方法。
[B56] 縮合工程が、20℃~60℃で行われる、[B1]~[B54]のいずれかに記載の方法。
[B57] 縮合工程を、2回以上繰り返す、[B1]~[B56]のいずれかに記載の方法。
[B58] 縮合工程を、2回繰り返す、[B1]~[B56]のいずれかに記載の方法。
[B59] 縮合工程の後に、固相に担持された、第二のアミノ酸もしくは第二のペプチドにおける保護アミノ基および/または保護ヒドロキシ基の保護基を脱保護する脱保護工程を更に含む、[B1]~[B58]のいずれかに記載の方法。
[B60] 縮合工程と脱保護工程との間に、固相を洗浄する洗浄工程を更に含む、[B59]に記載の方法。
[B61] 縮合工程と脱保護工程を複数回繰り返す(ただし、複数回の縮合工程で用いられる複数の第二のアミノ酸および/または第二のペプチドは、それぞれ同一であっても異なっていてもよい。)、[B59]または[B60]に記載の方法。
[B62] [B1]~[B61]のいずれかに記載の方法における、式(A’)で表されるカルボジイミド系縮合剤の使用。
[B63] [B1]~[B61]のいずれかに記載の方法における、DsBCの使用。
[B63-1] [B1]~[B61]のいずれかに記載の方法における、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)の使用。
[B63-2] [B1]~[B61]のいずれかに記載の方法における、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)の使用。
[B63-3] [B1]~[B61]のいずれかに記載の方法における、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)の使用。
[B63-4] [B1]~[B61]のいずれかに記載の方法における、N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)の使用。
[B1’] 液相法によるペプチド化合物の製造方法であって、
N-アルキルアミノ基を有する第一のアミノ酸、またはN末端にN-アルキルアミノ基を有する第一のペプチドを準備する準備工程;および
第一のアミノ酸または第一のペプチドと、保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のアミノ酸、または保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のペプチドとを、上記一般式(A’)で表される少なくとも1種のカルボジイミド系縮合剤、および添加剤の存在下、溶媒中で縮合させ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.4~4.0mol/Lである縮合工程
を含む、前記方法。
かかる方法によれば、高反応変換率で、目的のペプチド化合物を得ることができる。
[C1] [A1]~[A64]または[B1]~[B63]のいずれかに記載の方法を含む、メンブランに担持されたペプチド化合物の製造方法。
[C2] メンブランに担持されたペプチド化合物が、N-アルキルアミノ酸由来の構成単位を2以上有する、[C1]に記載の方法。
[C3] メンブランに担持されたペプチド化合物が、N-アルキルアミノ酸由来の構成単位を3以上、4以上、5以上、6以上、または7以上有する、[C1]または[C2]に記載の方法。
[C4] メンブランに担持されたペプチド化合物が、N-アルキルアミノ酸由来の構成単位を7以上有する、[C1]~[C3]のいずれかに記載の方法。
[C5] メンブランに担持されたペプチド化合物が、アミノ酸由来の構成単位を、合計で、7以上、8以上、9以上、または10以上有する、[C1]~[C4]のいずれかに記載の方法。
[C6] ペプチド化合物が、アミノ酸由来の構成単位を、合計で、10以上有する、[C1]~[C5]のいずれかに記載の方法。
[C7] ペプチド化合物が、アミノ酸由来の構成単位を、合計で、30以下、25以下、20以下、18以下、17以下、16以下、または15以下有する、[C1]~[C6]のいずれかに記載の方法。
[C8] ペプチド化合物が、アミノ酸由来の構成単位を、合計で、15以下有する、[C1]~[C7]のいずれかに記載の方法。
[C9] [C1]~[C8]のいずれかに記載の方法によって、メンブランに担持された10種類以上のペプチド化合物を得る工程を含む、メンブランに担持されたペプチドライブラリの製造方法。
[C10] [C1]~[C8]のいずれかに記載の方法によって、メンブランに担持された20種類以上、40種類以上、80種類以上、100種類以上、200種類以上、または384種類以上のペプチド化合物を得る工程を含む、メンブランに担持されたペプチドライブラリの製造方法。
[C11] [C1]~[C8]のいずれかに記載の方法によって、メンブランに担持された384種類以上のペプチド化合物を得る工程を含む、メンブランに担持されたペプチドライブラリの製造方法。
[C12] 自動合成機を用いる、[C1]~[C11]のいずれかに記載の方法。
[C13] メンブランに担持されたペプチド化合物からペプチド化合物を切り出す工程を更に含む、[C1]~[C12]のいずれかに記載の方法。
[C14] 光照射によりペプチド化合物を切り出す、[C13]に記載の方法。
[C15] [C13]または[C14]に記載の方法によって切り出したペプチド化合物を環化する工程を含む、環状ペプチドまたは環状ペプチドライブラリの製造方法。
[C16] 自動合成機を用いる、[C15]に記載の方法。
[D1] メンブランにリンカーを介して結合したペプチド化合物であって、N-アルキルアミノ酸由来の構成単位を2以上有する、前記ペプチド化合物。
[D2] ペプチド化合物が、N-アルキルアミノ酸由来の構成単位を3以上、4以上、5以上、6以上、または7以上有する、[D1]に記載のペプチド化合物。
[D3] ペプチド化合物が、アミノ酸由来の構成単位を、合計で、7以上、8以上、9以上、10以上、または11以上有する、[D1]または[D2]に記載のペプチド化合物。
[D4] ペプチド化合物が、アミノ酸由来の構成単位を、合計で、30以下、25以下、20以下、18以下、17以下、16以下、または15以下有する、[D1]~[D3]のいずれかに記載のペプチド。
[D5] [D1]~[D4]のいずれかに記載の、メンブランにリンカーを介して結合したペプチド化合物を10種類以上含む、ペプチドライブラリ。
[D6] メンブランにリンカーを介して結合したペプチド化合物を、20種類以上、40種類以上、80種類以上、100種類以上、200種類以上、または384種類以上含む、[D5]に記載のペプチドライブラリ。
[E1] 標的分子に結合する化合物をスクリーニングする方法であって、
(1)[C9]~[C16]のいずれかに記載の方法によりペプチドライブラリ、または環状ペプチドライブラリを合成すること;
(2)該ペプチドライブラリ、または環状ペプチドライブラリを標的分子と接触させること;
(3)標的分子に結合するペプチド化合物を選択すること
を含む、前記方法。
[E2] 標的分子がタンパク質、核酸、ポリペプチド、または糖鎖である、[E1]に記載の方法。
[E3] 標的分子に結合する化合物の選択が、表面プラズモン共鳴(Surface plasmon resonance)またはアルファスクリーン(Amplified Luminescent Proximity Homogeneous Assay)により実施される、[E1]または[E2]に記載の方法。
[F1] DsBCを含む、ペプチド合成における析出抑制剤。
[F2] N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)を含む、ペプチド合成における析出抑制剤。
[F3] N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)を含む、ペプチド合成における析出抑制剤。
[F4] N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)を含む、ペプチド合成における析出抑制剤。
[F5] N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)を含む、ペプチド合成における析出抑制剤。
[G1] N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)
[G2] N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)
[G3] N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)
[G4] N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)
[H1] N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)、N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)、N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)、またはN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H2] N,N’-ジ-sec-ブチルカルボジイミド(DsBC)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H3] N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン(SS26)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H4] N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン(SS27)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H5] N,N’-ビス(1-メチルブチル)メタンジイミン(SS28)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H6] N,N’-ビス(1-エチルプロピル)メタンジイミン(SS29)、又はN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H7] N’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミン(SS30)を縮合剤として用いて、アミド結合を形成する工程を含む、化合物の製造方法。
[H8] 前記アミド結合を形成する工程が、固相又は液相で行われる、[H1]~[H7]のいずれかに記載の製造方法。
上記番号付けにおいて、従属項が引用する番号は、特に言及がない限りその番号の枝番を含む。例えば、従属項において引用する[A2]は、[A2]とともに、その枝番である[A2-1]~〔A2-6〕を含むことを示す。他の番号付けにおいても同様である。
本明細書において「1つまたは複数の」とは、1つまたは2つ以上の数を意味する。「1つまたは複数の」が、ある基の置換基に関連する文脈で用いられる場合、この用語は、1つからその基が許容する置換基の最大数までの数を意味する。「1つまたは複数の」として具体的には、たとえば、1、2、3、4、5、6、7、8、9、10、および/またはそれより大きい数が挙げられる。
(i) A、(ii) B、(iii) C、(iv) AおよびB、(v) AおよびC、(vi) BおよびC、(vii) A、B、およびC。
本実施形態の固相法によるペプチド化合物の製造方法は、固相に担持された第一のアミノ酸または第一のペプチドを準備する準備工程;および第一のアミノ酸または第一のペプチドと、第二のアミノ酸または第二のペプチドとを、縮合剤および添加剤の存在下で縮合させる縮合工程を含む。
RA-N=C=N-RB ・・・(A)
式中、RAはC4~C10第2級または第3級アルキルであり、RBはC2~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RAおよびRBにおける各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい。一般式(A)で表されるカルボジイミド系縮合剤は、具体的には、例えば、DsBC、tBEC、DtBCなどが挙げられる。
RA’-N=C=N-RB’ ・・・(A’)
式中、RA’はC3~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RB’はC1~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RA’およびRB’における各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい。ただし、RA’における総炭素数は4以上である。一般式(A’)で表されるカルボジイミド系縮合剤は、具体的には、例えば、DsBC、tBEC、DtBC、EDCIなどが挙げられる。
第二のアミノ酸または第二のペプチドに対する縮合剤のモル比を、1.0、1.1、1.2、1.5、2.0、3.0、および4.0からなる値より選択される下限、並びに1.5、2.0、3.0、4.0、および5.0からなる値より選択される上限との組み合わせによって特定することが可能な範囲とすることができ、
第二のアミノ酸または第二のペプチドに対する添加剤のモル比を、0.01、0.05、0.1、0.2、0.3、0.4、0.5、0.6および0.7からなる値より選択される下限、並びに0.2、0.3、0.4、0.5、0.6、0.7、0.8、0.9および1.0からなる値より選択される上限との組み合わせによって特定することが可能な範囲とすることができる。
第二のアミノ酸または第二のペプチドに対する縮合剤および添加剤のモル比として、好ましくは、第二のアミノ酸または第二のペプチド:縮合剤:添加剤=約2:約2.4~3.2:約0.4~1.4である。
Ac : アセチル
DBU: 1,8-ジアザビシクロ[5.4.0]-7-ウンデセン
DCE: 1,2-ジクロロエタン
DCM: ジクロロメタン
DGDE: ジエチレングリコールジエチルエーテル
DIC: N,N’-ジイソプロピルカルボジイミド
DIPEA: N,N-ジイソプロピルエチルアミン
DMF: N,N-ジメチルホルムアミド
DMSO: ジメチルスルホキシド
DsBC: N,N’-ジ-sec-ブチルカルボジイミド
tBEC: 1-tert-ブチル-3-エチルカルボジイミド
EDCI・HCl: 1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩
FA: ギ酸
Fmoc: 9-フルオレニルメチルオキシカルボニル
HFIP: 1,1,1,3,3,3-ヘキサフルオロイソプロピルアルコール
HOAt: 1-ヒドロキシ-7-アザベンゾトリアゾール
HOBt: 1-ヒドロキシベンゾトリアゾール
HOOBt: 3,4-ジヒドロ-3-ヒドロキシ-4-オキソ-1,2,3-ベンゾトリアジン
MeCN: アセトニトリル
NMP: N-メチル-2-ピロリドン
Oxyma: シアノ(ヒドロキシイミノ)酢酸エチル
Oxyma B: 5-(ヒドロキシイミノ)-1,3-ジメチルピリミジン-2,4,6(1H,3H,5H)-トリオン
PyOxim: [エチルシアノ(ヒドロキシイミノ)アセタト-O2]トリ1-ピロリジニルホスホニウムヘキサフルオロリン酸塩
TBME: t-ブチルメチルエーテル
TFA: トリフルオロ酢酸
TFE: 2,2,2-トリフルオロエタノール
THF: テトラヒドロフラン
THP: テトラヒドロピラニル
TIPS: トリイソプロピルシラン
表4記載のFmoc保護アミノ酸はWO2018/225864記載の方法に従って合成した。
表5記載のFmoc保護アミノ酸は実施例1-1記載の方法で合成した。
メンブランディスクとしてはIntavis社(現CEM社)から購入したCelluSpots 384 frame with acid stable discsもしくはRefill of two frames, 384 acid stable discs(アミノ基修飾メンブラン)を用いた。
LCMS (ESI) m/z=424.1[M+H]+
保持時間:1.13分(分析条件SMD method_1)
LCMS (ESI) m/z=384.4[M+H]+
保持時間:1.32分(分析条件SMD method_2)
LCMS (ESI) m/z=524.2[M+Na]+
保持時間:1.22分(分析条件SMD method_1)
LCMS (ESI) m/z=510.5[M+Na]+
保持時間:1.95分(分析条件SMD method_3)
本明細書では、メンブランやレジンと化合物が結合した場合、メンブランやレジン部位を〇にて表記する場合がある。また、メンブラン部位の反応点を明確にさせる目的で、〇に接続させて反応部位の化学構造を表記させる場合がある。例えば、下記の構造(Fmoc-MePhe-Photo-Linker-Membrane(化合物SS02))では、アミノ基修飾メンブランのアミノ基がPhoto-Linkerのカルボン酸とアミド結合を形成している。
目的とするペプチドを構成するFmoc保護アミノ酸(0.6mol/L)とカルボン酸の活性化剤としてHOAtもしくはOxymaもしくはHOOBt(0.375mol/L)をNMPに溶解させて溶液1を調製した。N,N’-ジイソプロピルカルボジイミド(DIC)(0.71mol/L)とN,N-ジメチルホルムアミド(DMF)を混合し、溶液2を調製した。
CelluSpots 384 frame with acid stable discs(Intavis社製アミノ基修飾メンブラン;以下、「メンブランディスク」ともいう。)をペプチド合成機にセットした。溶液1および溶液2をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。
DBUのDMF溶液(2%v/v)を、メンブランディスク1枚あたり2.0μLおよび4.0μL添加し、室温にてFmoc基の脱保護を行った。1残基目の伸長前においては脱保護は必要とせず、1残基目伸長以降の脱保護においては2.0μL添加後に5分間反応させた後、一度溶液を排出し、4.0μL添加しさらに10分間反応させ、その後溶液を排出した。続いてDMF(メンブランディスク1枚あたり25μL)で7回、エタノール(メンブランディスク1枚あたり25μL)で2回、エタノール(メンブランディスク1枚あたり37.5μL)で2回、エタノール(メンブランディスク1枚あたり25μL)で2回洗浄し、引圧で15分間乾燥した。
溶液1と溶液2を5:6の比率で合成機のmixing vialで混合し15分間静置した後に、メンブランディスクに1枚あたり1.2μL添加し、室温にて40分間反応することでメンブランディスク上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液を排出した。この縮合反応を更にもう1回繰り返して行った。続いて無水酢酸(Ac2O)のDMF溶液(4%v/v)を、メンブランディスク1枚あたり4.0μL添加し、室温にて未反応アミンのアセチルキャッピングを行った。5分間反応させた後、溶液を排出した。次いでDMF(メンブランディスク1枚あたり25μL)で7回洗浄し、引圧で10分間乾燥した。
このFmoc基の脱保護反応に次ぐFmoc保護アミノ酸の縮合反応、アセチルキャッピングを1サイクルとし、このサイクルを繰り返すことでメンブランディスク表面上にペプチドを伸長させた。最後のアミノ酸の伸長後は脱Fmoc工程を行わずに、さらにDMF(メンブランディスク1枚あたり25μL)で7回、エタノール(メンブランディスク1枚あたり25μL)で2回、エタノール(メンブランディスク1枚あたり37.5μL)で2回、エタノール(メンブランディスク1枚あたり25μL)で2回または3回洗浄し、引圧で10~15分間乾燥した後、以後の検討に用いた。
目的とするペプチドを構成するFmoc保護アミノ酸(0.29mol/L)とカルボン酸の活性化剤としてHOAtもしくはOxymaもしくはHOOBt(0.181mol/L)をNMP/DMF=6.68/4.34もしくは5/6の溶液に溶解させて溶液1を調製した。N,N’-ジイソプロピルカルボジイミド(DIC)は原液のまま溶液2として用いた。
CelluSpots 384 frame with acid stable discs(Intavis社製)をペプチド合成機にセットした。溶液1および溶液2をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。
[操作1]の脱Fmoc工程と同様の方法で行った。
溶液1と溶液2を11.29:0.72の比率で合成機のmixing vialで混合し15分間静置した後に、メンブランディスクに1枚あたり1.2μL添加し、室温にて40分間反応することでメンブランディスク上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液を排出した。この縮合反応を更にもう1回繰り返して行った。その後は[操作1]の伸長工程と同様の方法で行った。
操作1または操作2の方法で調製した化合物SS02、SS03、SS24およびSS25を用いて実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS02*、SS03*、SS24*およびSS25*)の生成を確認した。なお、本実施例において、化合物番号に*を付した場合には、反応の確認のためにメンブランディスクからペプチドを切り出して確認した化合物を示す。
保持時間:3.33分(分析条件SQDAA05long)
保持時間:2.74分(分析条件SQDAA05long)
保持時間:2.76分(分析条件SQDAA05long)
保持時間:3.17分(分析条件SQDAA05long)
担持したFmocアミノ酸のメンブランに対する担持量の確認を以下の方法で行った。
操作1または操作2の方法で調製した化合物SS02、SS03、SS24、SS25(各メンブランディスク1枚)を反応容器に入れ、DBUのDMF溶液(2%v/v)をメンブランディスク1枚あたり4.0μL添加し、室温にて5分間反応させた後、再度4.0μL添加し室温にて10分間反応させてFmoc基の脱保護を行った。その後DMFをメンブランディスク1枚あたり392μL添加して溶出させ、得られた溶液をLC/MSにて分析した(injection volume:5μL)。
化合物SS02由来の化合物SS04の波長304nmにおけるUVエリア値:16359.88
化合物SS03由来の化合物SS04の波長304nmにおけるUVエリア値:15793.11
化合物SS24由来の化合物SS04の波長304nmにおけるUVエリア値:18782.30
化合物SS25由来の化合物SS04の波長304nmにおけるUVエリア値:18300.73
担持量(nmol)=(化合物SS04のUVエリア値(波長304nm))/(ジベンゾフルベン1nmolあたりのUVエリア値(波長304nm))
その結果、化合物SS02、SS03、SS24、およびSS25の担持量をそれぞれ57.9nmol/メンブランディスク、55.9nmol/メンブランディスク、66.4nmol/メンブランディスク、および64.7nmol/メンブランディスクと算出した。
なお、同様に合成した担持量が異なる別ロットについてもペプチド合成や検討等に使用した。
実施例1-3-1:1,3-ジイソプロピルウレア(DICウレア、化合物SS05)の合成
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 5.48 (2H, d, J = 7.2 Hz), 3.69-3.57 (2H, m), 1.00 (12H, d, J = 6.8 Hz)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 5.46 (2H, d, J = 8.0 Hz), 3.50-3.43 (2H, m), 1.32 (4H, dq, J = 7.2, 7.2 Hz), 0.97 (6H, d, J = 6.8 Hz), 0.81 (6H, t, J = 7.2 Hz)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 5.53 (2H, br), 2.98-2.91 (2H, m), 1.20 (9H, s), 0.95 (3H, t, J = 7.2 Hz)
LCMS (ESI) m/z=237.1[M+H]+
保持時間:0.77分(分析条件SQDFA05_1)
MS (ESI) m/z=203.2[M+H]+(分析条件LTQ method_1)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 7.38-7.25 (5H, m), 4.62 (1H, q, J = 6.4 Hz), 3.31-3.22 (1H, m), 1.45 (3H, d, J = 6.4 Hz), 1.42-1.25 (2H, m), 1.06 (3H, d and d, J = 6.4 Hz), 0.81 (3H, t and t, J = 7.6 Hz)
LCMS (ESI) m/z=245.2[M+H]+
保持時間:0.94分(分析条件SQDFA05_1)
MS (ESI) m/z=211.2[M+H]+(分析条件LTQ method_1)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 3.38-3.24 (2H, m), 1.48-1.25 (12H, m), 1.14 (6H, d, J = 6.4 Hz), 0.88 (3H, t, J = 7.6 Hz), 0.86 (3H, t, J = 7.6 Hz)
LCMS (ESI) m/z=217.2[M+H]+
保持時間:0.82分(分析条件SQDFA05_1)
MS (ESI) m/z=183.2[M+H]+(分析条件LTQ method_1)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 3.39-3.33 (2H, m), 1.42-1.23 (8H, m), 1.14 (6H, d, J = 6.4 Hz), 0.91-0.83 (6H, m)
LCMS (ESI) m/z=217.2[M+H]+
保持時間:0.79分(分析条件SQDFA05_1)
MS (ESI) m/z=183.2[M+H]+(分析条件LTQ method_1)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 3.08 (2H, tt, J = 4.8 Hz, 8.0 Hz), 1.56-1.30 (8H, m), 0.89 (12H, t, J = 7.2 Hz)
LCMS (ESI) m/z=217.2[M+H]+
保持時間:0.80分(分析条件SQDFA05_1)
MS (ESI) m/z=183.2[M+H]+(分析条件LTQ method_1)
1H-NMR (BRUKER Ascend 400, 400 MHz, DMSO-d6) δ 3.40-3.33 (1H, m), 3.11-3.05 (1H, m), 1.55-1.27 (8H, m), 1.14 (3H, d and d, J = 6.4 Hz), 0.91-0.85 (9H, m)
ペプチドの固相合成においては、脱Fmoc、メンブラン洗浄を経て、続くアミノ酸の伸長を行う。本実験では、メンブランに担持されたペプチド配列(化合物SS02)を用い、アミノ酸の伸長工程の試薬や当量比などの反応条件を変更し、目的の伸長反応の反応効率の程度を比較することでメンブラン上のペプチド合成における好ましい試薬および反応条件の範囲を特定した。
アミノ酸の伸長効率を評価するにあたり、出発原料残存率を確認するためにGlycine cappingを実施した。すなわち、目的のアミノ酸の伸長反応を実施した後、続けてFmoc-Gly-OHの伸長反応を実施し未反応のアミンと反応させた。その後実施例1-2に記載の方法でメンブランから切り出し、目的のアミノ酸が伸長したペプチドとFmoc-Gly-OHが伸長したペプチドのUVエリア値を比較することで目的のアミノ酸の伸長効率を算出した。
参照例2-1-1:メンブラン上に担持されたMePhe上のFmoc基の除去
Fmoc-Nle-OH(0.45mol/L)とHOBt(0.675mol/L)をNMPに溶解させた溶液とDIC(1.485mol/L)をNMPに溶解させた溶液を3:1の比率で混合し、15分間静置した後にその溶液を反応容器に入れた参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で所定の時間静置した。続いて、メンブランをDMF(メンブランディスク1枚あたり100μL)で3回、エタノール(メンブランディスク1枚あたり100μL)で3回洗浄し、空気乾燥した。続いてFmoc-Gly-OH(0.6mol/L)とHOAt(0.375mol/L)をNMPに溶解させた溶液とDIC(0.71mol/L)をDMFに溶解させた溶液を5:6の比率で混合し、10~15分間静置した後にその溶液を反応容器内のメンブランに対し3.0μL添加した。蓋をして室温で25~60分間静置した後、溶液をメンブランから排出し、再度上記のFmoc-Gly-OHの伸長反応を行った。溶液を排出した後、メンブランをDMF(メンブランディスク1枚あたり100μL)で3~4回、エタノール(メンブランディスク1枚あたり100μL)で3回洗浄し、空気乾燥した。
参照例2-1-2で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。
保持時間:3.64分(分析条件SQDAA05long)
保持時間:3.20分(分析条件SQDAA05long)
伸長効率(%)=(SS09*のUVエリア値)/(SS09*のUVエリア値とSS10*のUVエリア値の合算値)x100
参照例2-2-1:メンブラン上に担持されたMePheに対するFmoc-Nle-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、N-置換アミノ酸を含むペプチドの合成方法(WO2018/225851)を参考に反応条件を設定し、メンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
Fmoc-Nle-OH(0.6mol/L)とHOAt(0.375mol/L)をNMPもしくはDMFに溶解させた溶液とDIC(0.71mol/L)をDMFに溶解させた溶液を5:6の比率で混合し、15分間静置した後にその溶液を反応容器に入れた参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で所定の時間静置した。以降は参照例2-1と同様の方法で行った。
参照例2-2-1で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
参照例2-2の条件および結果を以下の表7に示す。
参照例2-3-1:メンブラン上に担持されたMePheに対するFmoc-Nle-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、伸長効率を上げるために試薬濃度を上げてメンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
Fmoc-Nle-OH(0.62mol/L)とHOAt(0.193mol/Lもしくは0.387mol/L)をNMP/DMF=5/6もしくは6.68/4.34の溶液、あるいはDMFに溶解させた溶液とDIC(原液)を10:1.353の比率で混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で60分間静置した。この際、15分間静置した溶液の一部をMeCNで希釈し、その溶液をLCMSを用いて分析した(分析条件SQDFA05_1)。また、反応時間経過したメンブランに1mLのMeCNを添加し、メンブランに染み込んだ反応溶液を溶解させ、そのMeCN溶液をLCMSを用いて分析した(分析条件SQDFA05_1)。
保持時間:0.89分(分析条件SQDFA05_1)
保持時間:1.02分(分析条件SQDFA05_1)
活性エステルのUVエリア値の割合(%)=(活性エステルのUVエリア値)/(Fmoc-Nle-OHのUVエリア値+活性エステルのUVエリア値+ピーク1のUVエリア値+ピーク2のUVエリア値)x100
なお、ピーク1は保持時間1.07分のピークで、Fmoc-Nle-OHとDICから成る生成物と推定され、ピーク2は保持時間1.22分のピークで、Fmoc-Nle-OHの二量体と推定される。
以降は参照例2-1と同様の方法で行った。
参照例2-3-1で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
縮合剤としてDICを用いた試薬高濃度条件における伸長効率は、後述の表9に記載の通り、83%~96%と高い結果を与えた。しかしながら、いずれの条件においても析出物が発生し、自動合成に適用することが困難な条件であった。
実施例2-4-1:メンブラン上に担持されたMePheに対するFmoc-Nle-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、DICをDsBCに変更した反応条件でメンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
Fmoc-Nle-OH(0.63mol/L)とHOAt(0.198mol/Lもしくは0.397mol/L)をNMP/DMF=5/6もしくは6.68/4.34の溶液、あるいはDMFに溶解させた溶液とDsBC(原液)を10:1.642の比率で混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で所定の時間静置した。この際、15分間静置した溶液の一部をMeCNで希釈し、その溶液をLCMSを用いて分析した(分析条件SQDFA05_1)。また、反応時間経過したメンブランに1mLのMeCNを添加し、メンブランに染み込んだ反応溶液を溶解させ、そのMeCN溶液をLCMSを用いて分析した(分析条件SQDFA05_1)。それぞれの分析結果における活性エステル(化合物SS11)のUVエリア値の割合(波長299nm)を以下の式から算出した。
活性エステルのUVエリア値の割合(%)=(活性エステルのUVエリア値)/(Fmoc-Nle-OHのUVエリア値+活性エステルのUVエリア値+ピーク2のUVエリア値+ピーク3のUVエリア値)x100
なお、ピーク3は保持時間1.15分のピークで、Fmoc-Nle-OHとDsBCから成る生成物と推定され、ピーク2は保持時間1.22分のピークで、Fmoc-Nle-OHの二量体と推定される。
以降は参照例2-1と同様の方法で行った。
実施例2-4-1で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
参照例2-3および実施例2-4の条件および結果を以下の表8および表9に示す。
実施例2-5-1:DsBC使用条件でのメンブラン上に担持されたMePheに対するFmoc-MeSer(THP)-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、参照例2-3-1の反応条件を参考にメンブラン上のMePheに対するFmoc-MeSer(THP)-OHの伸長反応を行った。Fmoc-MeSer(THP)-OH(0.62mol/L)とHOAtもしくはHOOBt(0.193mol/L)をDMFに溶解させた溶液とDIC(原液)を10:1.353の比率で混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例2-5-3で得られたメンブラン(化合物SS31)を使用し、参照例2-3-1の反応条件を参考にメンブラン上のMeAlaに対するFmoc-MeAsp(OPis)-OHの伸長反応を行った。Fmoc-MeAsp(OPis)-OH(0.62mol/L)とOxyma(0.193mol/L)をDMFに溶解させた溶液とDIC(原液)を10:1.353の比率で混合し、15分間静置した後にその溶液をメンブラン(化合物SS31)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例2-5-5で得られたメンブラン(化合物SS33)を使用し、参照例2-3-1の反応条件を参考にメンブラン上のMeSer(THP)に対するFmoc-MePhe-OHの伸長反応を行った。Fmoc-MePhe-OH(0.62mol/L)とHOAt(0.193mol/L)をDMFに溶解させた溶液とDIC(原液)を10:1.353の比率で混合し、15分間静置した後にその溶液をメンブラン(化合物SS33)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例(参照例)2-5-1~2-5-6で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS12*、SS32*およびSS34*)ならびに望みのFmoc保護アミノ酸の代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*、SS35*およびSS36*)(これらをGlycine capping体と呼ぶこともある)の生成を確認した。
保持時間:3.61分(分析条件SQDAA05long)
保持時間:3.52分(分析条件SQDAA05long)
保持時間:3.56分(分析条件SQDAA05long)
保持時間:2.58分(分析条件SQDAA05long)
保持時間:3.03分(分析条件SQDAA05long)
伸長効率(%)=(目的ペプチドのUVエリア値)/(目的ペプチドのUVエリア値とGlycine capping体のUVエリア値の合算値)x100
実施例(参照例)2-5-1~2-5-6の条件および結果を以下の表10に示す。
実施例2-6-1:DICウレア、DsBCウレアおよびtBECウレアのDMFに対する溶解度確認実験
参照例2-3、実施例2-4および2-5の伸長工程にて実施されているPreactivationの際のカルボジイミドの濃度は0.77mol/Lである。カルボジイミドが全てウレアに変換された場合にその析出が起こるリスクを確認するため、参照例2-3で析出物が確認されたDICおよび実施例2-4および2-5にて析出物が確認されなかったDsBC由来のウレアを用いて、それらのNMPおよびDMFへの溶解度を以下の手順に従い確認した。
1.5mLスクリューキャップバイアルに実施例1-3にて合成したDICウレア(化合物SS05)およびDsBCウレア(化合物SS06)を表11記載の重量測り取り、各濃度になるようにNMPあるいはDMFを添加した。室温にて5分以上攪拌し、その後静置してウレアの溶解の有無を確認した。その結果、DICウレアである化合物SS05はNMPでは0.34M以上、DMFでは0.17M以上の濃度で固体が溶解しきらなかったのに対し、DsBCウレアである化合物SS06はNMP、DMFいずれも0.77Mで完全に溶解し24時間以上経過しても再析出が確認されなかった。
DICおよびDsBCとアルキル基の異なるtBECを用いて実施例2-6-1と同様の実験を行った。1.5mLスクリューキャップバイアルに、実施例1-3にて合成したtBECウレア(化合物SS07)を10.18mgおよび10.19mg測り取り、0.77mol/LになるようにそれぞれNMPあるいはDMFを添加した。室温にて5分以上攪拌し、その後静置してウレアの溶解の有無を確認した。その結果、tBECウレアもDsBCウレアと同様に完全に溶解し24時間以上経過しても再析出は確認されなかった。
実施例2-7-1:tBECを用いたメンブラン上に担持されたMePheに対するFmoc-Nle-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、実施例2-4-1の反応条件を参考に実施例2-6でそのウレアのDMFへの良好な溶解度が確認されたtBECを用いてメンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
Fmoc-Nle-OH(0.62mol/L)とHOAt(0.194mol/L)をDMFに溶解させた溶液とtBEC(原液)を10:1.355の比率で混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例2-7-1で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
実施例2-7の結果を以下の表12に示す。
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、実施例2-4-1の反応条件を参考に実施例1-4で合成した種々のカルボジイミドを用いてメンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
以下の表13に従いFmoc-Nle-OHとHOAtをDMFに溶解させた溶液とカルボジイミド(原液)を混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例2-7-3で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
結果を以下の表14に示す。
実施例2-8-1:種々の反応温度、反応溶媒および試薬の当量比でのメンブラン上に担持されたMePheに対するFmoc-Nle-OHの伸長反応
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、実施例2-4-1の反応条件をもとに反応温度、反応溶媒および試薬の当量を変更してメンブラン上のMePheに対するFmoc-Nle-OHの伸長反応を行った。
以下の表15に従いFmoc-Nle-OHとHOAtを各種反応溶媒に溶解させた溶液とDsBC(原液)を混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、種々の温度で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例2-8-1で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*)およびFmoc-Nle-OHの代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。伸長効率は参照例2-1記載の計算式に従い算出した。
結果を以下の表16に示す。
以上、実施例2の結果より、メンブラン上のペプチド合成の伸長工程において、伸長効率を改善しつつカルボジイミド由来のウレア析出の抑制が可能なカルボジイミドの種類含む反応条件の一部が特定された。
本実験では、実施例2で特定したメンブラン上のペプチド合成における好まれる反応条件を用いて、他のアミノ酸の伸長反応を実施した。アミノ酸の伸長効率の評価は実施例2と同様の方法にて行った。また、本条件のペプチド合成機への適用を実施した。
実施例3-1-1:メンブラン上に担持されたPro上のFmoc基の除去
Fmoc-Asp(OPis)-OH(0.62mol/L)と活性化剤(0.194mol/Lもしくは0.387mol/L)をDMFに溶解させた溶液とtBEC(原液)を10:1.355の比率で混合し、15分間静置した後にその溶液をメンブランに対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
実施例3-1-2で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS14*)および望みのFmoc保護アミノ酸の代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS15*)の生成を確認した。
保持時間:3.55分(分析条件SQDAA05long)
保持時間:2.61~2.62分(分析条件SQDAA05long)
伸長効率は実施例2-5記載の計算式に従い算出した。
結果を以下の表17に示す。
後述の表18に従いFmoc-Asp(OPis)-OHとOxymaをDMFに溶解させた溶液とDIC(原液)を混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
参照例2-1-1で得られたメンブラン(化合物SS08)を使用し、実施例2-7-3の反応条件を参考に実施例1-4で合成した種々のカルボジイミドを用いてメンブラン上のMePheに対するFmoc-Asp(OPis)-OHの伸長反応を行った。
以下の表18に従いFmoc-Asp(OPis)-OHとOxymaをDMFに溶解させた溶液と各種カルボジイミド(原液)を混合し、15分間静置した後にその溶液を参照例2-1-1で得られたメンブラン(化合物SS08)に対し1.2μL添加し、室温で30分間静置した。以降は参照例2-1と同様の方法で行った。
参照例3-1-4ならびに実施例3-1-5で得られたメンブランに対し実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS37*)および望みのFmoc保護アミノ酸の代わりにFmoc-Gly-OHが伸長したペプチド(化合物SS10*)の生成を確認した。
保持時間:3.80分(分析条件SQDAA05long)
伸長効率は実施例2-5記載の計算式に従い算出した。
結果を以下の表19に示す。
伸長するFmoc保護アミノ酸(0.63mol/L)とHOAtもしくはOxymaもしくはHOOBt(0.198mol/Lもしくは0.397mol/L)をDMFに溶解させて溶液1を調製した。DsBCは原液のまま溶液2として用いた。
Fmoc保護アミノ酸伸長後にGlycine cappingをするために、Fmoc-Gly-OH(0.6mol/L)とHOAt(0.375mol/L)をNMPに溶解させて溶液3を調製した。DIC(0.71mol/L)とDMFを混合し、溶液4を調製した。
CelluSpots 384 frame with acid stable discs(Intavis社製)に実施例1-2-1で得られたメンブラン(化合物SS02)を装着し、ペプチド合成機にセットした。溶液1~4をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。
DBUのDMF溶液(2%v/v)を、メンブランディスク1枚あたり2.0μLおよび4.0μL添加し、室温にてFmoc基の脱保護を行った。2.0μL添加後に5分間反応させた後、一度溶液を排出し、4.0μL添加しさらに10分間反応させ、その後溶液を排出した。続いてDMF(メンブランディスク1枚あたり25μL)で7回、エタノール(メンブランディスク1枚あたり25μL)で2回、エタノール(メンブランディスク1枚あたり37.5μL)で2回、エタノール(メンブランディスク1枚あたり25μL)で2回洗浄し、引圧で15分間乾燥した。
溶液1と溶液2を10:1.642の比率で合成機のmixing vialで混合し15分間静置した後に、メンブランディスクに1枚あたり1.2μL添加し、室温にて40分間反応することでメンブランディスク上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液を排出した。次いでDMF(メンブランディスク1枚あたり25μL)で4回、エタノール(メンブランディスク1枚あたり25μL)で3回洗浄し、引圧で15分間乾燥した。その後縮合反応、洗浄および乾燥を更にもう1回繰り返して行った。
続いて溶液3と溶液4を5:6の比率で合成機のmixing vialで混合し15分間静置した後に、メンブランディスクに1枚あたり3.0μL添加し、室温にて40分間反応することでGlycine cappingを行った後、溶液を排出した。その後上記のFmoc-Gly-OHの伸長反応を再度行った。次いでDMF(メンブランディスク1枚あたり25μL)で7回洗浄し、引圧で10分間乾燥した。アミノ酸の伸長後は脱Fmoc工程を行わずに、さらにDMF(メンブランディスク1枚あたり25μL)で7回、エタノール(メンブランディスク1枚あたり25μL)で2回、エタノール(メンブランディスク1枚あたり37.5μL)で2回、エタノール(メンブランディスク1枚あたり25μL)で3回洗浄し、引圧で10分間乾燥した。
調製した化合物SS09、化合物SS12、化合物SS16および化合物SS17を用いて実施例1-2に記載の方法でペプチドの切り出しを行い、目的ペプチド(化合物SS09*、化合物SS12*、化合物SS16*および化合物SS17*)の生成を確認した。
保持時間:3.63分(分析条件SQDAA05long)
保持時間:3.61分(分析条件SQDAA05long)
保持時間:3.72分(分析条件SQDAA05long)
保持時間:3.49分(分析条件SQDAA05long)
実施例2で特定したメンブラン上のペプチド合成における好まれる反応条件を自動合成機での合成に適用し、環状ペプチドの並列合成を行った。
実施例1-2および3-2の反応条件を参考に自動合成機にてペプチドの伸長を実施し以下の表21記載の配列を伸長した。
1残基目の伸長でメンブラン上の反応点の数を調整するために、Fmoc-Photo-Linker(0.072mol/L)、4-フェノキシ酪酸(0.22mol/L)およびHOBt(0.181mol/L)をDMFに溶解させて溶液1を調製した。DICは原液のまま溶液2として用いた。2残基目以降の伸長で使用する溶液として、伸長するFmoc保護アミノ酸(0.63mol/L)とHOAtもしくはOxymaもしくはHOOBt(0.198mol/Lもしくは0.397mol/L)をDMFもしくはNMPに溶解させて溶液3を調製した。その組み合わせを以下の表22に記載した。DsBCは原液のまま溶液4として用いた。
[1残基目]
メンブラン上のN末端にはFmoc基が存在していないためこの操作は省略した。
[2残基目以降]
DBUのDMF溶液(2%v/v)を、メンブランディスク1枚あたり6.0μL添加し、室温にてFmoc基の脱保護を行った。6.0μL添加後に15分間反応させ、その後溶液を排出した。続いてDMF(メンブランディスク1枚あたり37.5μL)で7回、エタノール(メンブランディスク1枚あたり37.5μL)で6回洗浄し、引圧で15分間乾燥した。
[1残基目]
溶液1と溶液2を11.29:0.72の比率で合成機のmixing vialで混合し15分間静置した後に、メンブランディスクに1枚あたり1.2μL添加し、室温にて40分間反応することでメンブランディスク上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液を排出した。次いでDMF(メンブランディスク1枚あたり37.5μL)で4回、エタノール(メンブランディスク1枚あたり37.5μL)で3回洗浄し、引圧で15分間乾燥した。その後縮合反応を更にもう1回30分間行い、次いでDMF(メンブランディスク1枚あたり37.5μL)で7回、エタノール(メンブランディスク1枚あたり37.5μL)で5回洗浄し、引圧で15分間乾燥した。
[2残基目以降]
溶液3と溶液4を10.31:0.169の比率で合成機のmixing vialで混合し10分間静置した後に、メンブランディスクに1枚あたり1.2μL添加し、室温にて30分間反応することでメンブランディスク上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液を排出した。次いでDMF(メンブランディスク1枚あたり37.5μL)で4回、エタノール(メンブランディスク1枚あたり37.5μL)で3回洗浄し、引圧で15分間乾燥した。その後縮合反応を更にもう1回30分間行い、続いて無水酢酸(Ac2O)のDMF溶液(4%v/v)を、メンブランディスク1枚あたり4.0μL添加し、室温にて未反応アミンのアセチルキャッピングを行った。5分間反応させた後、溶液を排出した。次いでDMF(メンブランディスク1枚あたり37.5μL)で7回洗浄し、引圧で10分間乾燥した。
このFmoc基の脱保護反応に次ぐFmoc保護アミノ酸の縮合反応、アセチルキャッピングを1サイクルとし、このサイクルを繰り返すことでメンブランディスク表面上にペプチドを伸長させた。最後のアミノ酸の伸長、アセチルキャッピング、DMF洗浄、乾燥後にさらにエタノール(メンブランディスク1枚あたり37.5μL)で6回洗浄し、引圧で15分間乾燥した。
実施例3-3-1で得られたメンブラン(化合物SS38~SS46)を使用し、脱保護反応、環化反応、メンブランからの切り出しならびに分析を実施し以下の表23記載の目的ペプチド(化合物SS47~SS55)の生成を確認した。
メンブランディスクを1枚ずつ反応容器に入れ、DBUのDMF溶液(2%v/v)をメンブランディスク1枚あたり4.0μL添加し、室温にて5分間反応させた後、再度4.0μL添加し室温にて10分間反応させてFmoc基の除去を行った。続いてメンブランディスク1枚あたり100μLのDMFで4回、100μLのDCMで3回洗浄し、風乾した。
HFIP(2.47mL)、TIPS(51.2μL)、DCE(21.3μL)を混合した溶液に21.9mgの硫酸水素テトラメチルアンモニウムを溶解させて0.05Mの硫酸水素テトラメチルアンモニウム溶液を調製した。
メンブランディスクを1枚ずつ反応容器に入れ、調製した溶液をメンブランディスク1枚あたり150μL添加し、室温にて4.5時間反応させてPis基およびTHP基の除去を行った。続いてメンブランディスク1枚あたり100μLのNMPで2回洗浄し、その後100μLのDIPEAのNMP溶液(60mM)を添加し室温で5分間静置した。溶液を排出し、続いて100μLのNMPで1回、DCMで3回洗浄し、風乾した。
NMP(184μL)とTHF(1.66mL)を混合した溶液にPyOxim(49.8mg)を溶解させ、DIPEA(19.7μL)を添加することで50mM PyOxim/60mM DIPEA溶液を調製した。
メンブランディスクを1枚ずつ反応容器に入れ、調製した溶液をメンブランディスク1枚あたり150μL添加し、50℃に昇温して2時間反応させて環化反応を行った。続いてメンブランディスク1枚あたり100μLのDMFで4回、100μLのDCMで3回洗浄し、風乾した。
メンブランディスクを1枚ずつ反応容器に入れ、実施例1-2に記載の方法を参考にして以下の手順でペプチドの切り出しおよび分析を行い、目的のペプチド(化合物SS47~SS55)の生成を確認した。
室温下に置いた反応容器中のメンブランディスクに対しDMSOを10μL添加した。続いてUV波長365nm、照度380~600mW/cm2で2分30秒間光照射した。その後メンブランに対し10μLのDMSOを添加し、15分以上静置しペプチドを溶解させた。その溶液をLCMSにて分析した。
純度(%)=(目的ペプチドのUVエリア値)/(バックグラウンドおよびFmoc-PEG6-OH中に含まれる不純物由来のピークを除いた全ピークのUVエリア値の合算値)x100
なお、Fmoc-PEG6-OH中に含まれる不純物はFmoc基が酸化され脱保護されなくなった化合物と推定される。
本実験では、N-置換アミノ酸を含むペプチドの合成方法(WO2018/225851)に従った反応条件および実施例2で特定したメンブラン上のペプチド合成における好まれる反応条件を用いて、レジン上のペプチド合成実験を実施した。Cl-Trt(2-Cl)レジン(1.25~1.60mmol/g,100-200mesh,1%DVB)は渡辺化学工業株式会社またはSUNRESIN社から購入した。
実施例4-1-1:(3S)-4-(ジメチルアミノ)-3-(9H-フルオレン-9-イルメトキシカルボニルアミノ)-4-オキソブタン酸(Fmoc-Asp-NMe2、SS18)の合成
LCMS(ESI) m/z=461.3[M+Na]+
保持時間:0.88分(分析条件分析条件SQDFA05_2)
LCMS(ESI) m/z=383.2[M+H]+
保持時間:0.66分(分析条件分析条件SQDFA05_2)
担持量の確認のため、得られた化合物SS19(10.48mg)を反応容器に入れ、DMF(4.0mL)を加えて、室温にて30分間振盪した。その後、DBU(40μL)を加えて30℃で15分間振盪した。その後、反応混合液が10.0mLになるようにDMFを加え、その溶液80μLをDMF(920μL)で希釈した。得られた希釈溶液をLC/MSで分析し(分析条件SQDFA05_1、injection volume:5μL)、ジベンゾフルベンのUVarea値(294nmにおけるUVarea値:4929.82、304nmにおけるUVarea値:4428.76)より、化合物SS19の担持量を0.469mmol/gと算出した。(濃度既知のFmoc-Gly-OH(商業的供給業者から購入)とDBUの混合溶液を標準物質として測定日毎に波長294nmと304nmにおけるジベンゾフルベンのUVarea値をもとに作成した検量線を用い、各々の波長で算出された担持量の平均値をレジンの担持量とした。)
なお、同様に合成した担持量が異なる別ロットについてもペプチド合成や検討等に使用した。
実施例4-2-1:化合物SS20(MeVal-Asp(O-Trt(2-Cl)-resin)-NMe2)の調製
目的とするペプチドを構成するFmoc-MeVal-OH(0.6mol/L)とカルボン酸の活性化剤としてHOAt(0.375mol/L)をNMPに溶解させて溶液1を調製した。DIC(0.71mol/L)とDMFを混合し、溶液2を調製した。
実施例4-1-4にて調製した(3S)-4-(ジメチルアミノ)-3-(9H-フルオレン-9-イルメトキシカルボニルアミノ)-4-オキソブタン酸-2-クロロトリチルレジン(化合物SS19、Fmoc-Asp(O-Trt(2-Cl)-resin)-NMe2)(1カラムあたり100mg)を固相反応容器に加え、ペプチド合成機にセットした。このレジン(100mg)にDCM(1.0mL)を加えて30分程度静置することでレジンの膨潤を行った。溶液1および溶液2をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。溶液をフリットから排出し、続いてレジンをDMF(1カラムあたり0.7mL)にて2回洗浄した。
DBUのDMF溶液(2%v/v、1カラムあたり0.7mL)を添加し、室温~30℃にてFmoc基の脱保護を行った。4.5分間反応させた後、溶液をフリットから排出した。続いてDMF(1カラムあたり0.7mL)で4回洗浄した。
溶液1(0.3mL)と溶液2(0.36mL)を合成機のmixing vialで混合した後に、レジンに添加し、固相反応容器を40℃まで加温し、2.5時間反応することでレジン上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液をフリットから排出した。次いでレジンをDMF(1カラムあたり0.7mL)で3回洗浄した。
DBUのDMF溶液(2%v/v、1カラムあたり0.7mL)を添加し、室温~35℃にてFmoc基の脱保護を行った。10分間反応させた後、溶液をフリットから排出した。続いてDMF(1カラムあたり0.7mL)で4回洗浄した。
反応終了後も合成機にセットしたままの状態で参照例4-2-2aまたは実施例4-2-2b記載の実験に用いた。
実施例4-2-1で調製したMeVal-Asp(O-Trt(2-Cl)-resin)-NMe2(化合物SS20、1カラムあたり100mg)を使用し、ペプチド合成機(Multipep RS;Intavis社製)を用いて、実施例2-4のNo.1記載の反応条件で、Fmoc-MeVal-OHの伸長反応を行った。操作の詳細な手順については合成機に付属のマニュアルに従った。
Fmoc-MeVal-OH(0.6mol/L)とHOAt(0.375mol/L)をNMPに溶解させて溶液1を調製した。DIC(0.71mol/L)とDMFを混合し、溶液2を調製した。
溶液1および溶液2をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。
溶液1(0.3mL)と溶液2(0.36mL)を合成機のmixing vialで混合した後に、レジンに添加し、固相反応容器を40℃まで加温し、2.5時間反応することでレジン上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液をフリットから排出した。次いでレジンをDMF(1カラムあたり0.7mL)で3回洗浄した。
実施例4-2-1で調製したMeVal-Asp(O-Trt(2-Cl)-resin)-NMe2(化合物SS20、1カラムあたり100mg)を使用し、実施例2-4の反応条件を参考にしてDsBCを用いて試薬濃度を上げて、実施例2-4のNo.2~No.5記載の反応条件で、レジン上のMeValに対するFmoc-MeVal-OHの伸長反応を行った。
Fmoc-MeVal-OH(0.63mol/L)とHOAt(0.198mol/Lもしくは0.397mol/L)をDMFに溶解させて調製した溶液1(601μL)とDsBC(原液)(98.7μL)を混合した後に、その混合溶液660μLをレジンに添加し、固相反応容器を40℃または50℃まで加温し、2.5時間反応することでレジン上のアミノ基とFmoc保護アミノ酸の縮合反応を行った。その後、溶液をフリットから排出した。次いでレジンをDMF(1カラムあたり0.7mL)で3回洗浄した。
目的とするペプチドを構成するFmoc-Gly-OH(0.6mol/L)とカルボン酸の活性化剤としてHOAt(0.375mol/L)をNMPに溶解させて溶液1を調製した。DIC(0.71mol/L)とDMFを混合し、溶液2を調製した。
参照例4-2-2aあるいは実施例4-2-2bにて調製した化合物SS21(1カラムあたり100mg)を固相反応容器に加え、ペプチド合成機にセットした。溶液1および溶液2をペプチド合成機にセットし、ペプチド合成機による自動合成を開始した。
DBUのDMF溶液(2%v/v、1カラムあたり0.7mL)を添加し、室温~35℃にてFmoc基の脱保護を行った。10分間反応させた後、溶液をフリットから排出した。続いてDMF(1カラムあたり0.7mL)で4回洗浄した。
溶液1(0.3mL)と溶液2(0.36mL)を合成機のmixing vialで混合した後に、レジンに添加し、固相反応容器を40℃まで加温し、2.5時間反応することでレジン上のアミノ基とFmoc保護アミノ酸の縮合反応を行った後、溶液をフリットから排出した。次いでレジンをDMF(1カラムあたり0.7mL)で3回洗浄した。さらにDCM(1カラムあたり1.0mL)で4回洗浄し、乾燥させた後、以後の検討に用いた。
得られたレジンの一部に対し、DIPEA(0.042mol/L)を含むTFE/DCM溶液(1/1(v/v))にてペプチドの切り出しをおこなった。切り出した溶液をLCMSにて分析したところ、目的ペプチド(化合物SS22*)の生成が確認された。また、目的ペプチドの他にMeValが一つ欠損した化合物SS23*の生成も確認された。
保持時間:0.80分(分析条件SQDFA05_3)
保持時間:0.72分(分析条件SQDFA05_3)
LCデータの各化合物ピークのUVエリア値(波長299nm)を用いて、伸長効率を以下の式から算出した。
伸長効率(%)=(化合物SS22*のUVエリア値)/(化合物SS22*のUVエリア値と化合物SS23*のUVエリア値の合算値)x100
Claims (15)
- 固相法によるペプチド化合物の製造方法であって、
固相に担持された、アミノ基を有する第一のアミノ酸またはアミノ基を有する第一のペプチドを準備する準備工程;および
第一のアミノ酸または第一のペプチドと、保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のアミノ酸、または保護アミノ基および/または保護ヒドロキシ基、ならびにカルボキシ基を有する第二のペプチドとを、下記一般式(A)で表される少なくとも1種のカルボジイミド系縮合剤、
RA-N=C=N-RB ・・・(A)
(式中、RAはC4~C10第2級または第3級アルキルであり、RBはC2~C10アルキル、C6~C10アリールまたはC7~C14アリールアルキルであり、RAおよびRBにおける各基は、ハロゲン、C1~C6アルコキシ、ジC1~C6アルキルアミノ、または4~8員環状アミノより独立して選択される1つまたは複数の基によって置換されていてもよい。)
および添加剤の存在下で縮合させる縮合工程
を含む、前記方法。 - RAはC4~C8第2級または第3級アルキルであり、RBはC4~C10第2級または第3級アルキル、またはC7~C14アリールアルキルである、請求項1に記載の方法。
- カルボジイミド系縮合剤が、N,N’-ジ-sec-ブチルカルボジイミド(DsBC)、N’-(1-フェニルエチル)-N-sec-ブチル-メタンジイミン、N’-(1-メチルへプチル)-N-sec-ブチル-メタンジイミン、N,N’-ビス(1-メチルブチル)メタンジイミン、N,N’-ビス(1-エチルプロピル)メタンジイミン、およびN’-(1-エチルプロピル)-N-(1-メチルブチル)メタンジイミンからなる群より選択される少なくとも1種を含む、請求項1または2に記載の方法。
- 添加剤が、1-ヒドロキシ-7-アザベンゾトリアゾール(HOAt)、1-ヒドロキシベンゾトリアゾール(HOBt)、3,4-ジヒドロ-3-ヒドロキシ-4-オキソ-1,2,3-ベンゾトリアジン(HOOBt)、シアノ(ヒドロキシイミノ)酢酸エチル(Oxyma)、および5-(ヒドロキシイミノ)-1,3-ジメチルピリミジン-2,4,6(1H,3H,5H)-トリオン(Oxyma B)からなる群より選択される少なくとも1種である、請求項1~3のいずれか一項に記載の方法。
- 縮合工程が溶媒中で行われ、溶媒中におけるカルボジイミド系縮合剤の濃度が、0.4mol/L以上、0.5mol/L以上、0.6mol/L以上、または0.7mol/L以上である、請求項1~4のいずれか一項に記載の方法。
- 固相がメンブランまたは固相合成用樹脂である、請求項1~5のいずれか一項に記載の製造方法。
- メンブランがセルロースメンブラン、ポリプロピレンメンブラン、またはポリアミノエチルメタクリルアミドメンブランである、請求項6に記載の方法。
- 固相と、第一のアミノ酸または第一のペプチドとが、光開裂性部位、ジスルフィド結合、または酸不安定部位を介して結合されている、請求項1~7のいずれか一項に記載の方法。
- 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、非天然アミノ酸である、請求項1~8のいずれか一項に記載の方法。
- 第一のアミノ酸、または第一のペプチドのN末端のアミノ酸が、α,α-ジ置換アミノ酸、β-分岐アミノ酸、またはN-アルキルアミノ酸(ただし、N-アルキルアミノ酸におけるアルキルはC3~C6シクロアルキル、C2~C6アルケニル、C2~C6アルキニル、またはC6~C10アリールより独立して選択される1つまたは複数の基によって置換されていてもよい)である、請求項1~9のいずれか一項に記載の方法。
- 第二のアミノ酸、または第二のペプチドのC末端のアミノ酸が、非天然アミノ酸である、請求項1~10のいずれか一項に記載の方法。
- 請求項1~11のいずれか一項に記載の方法における、式(A)で表されるカルボジイミド系縮合剤の使用。
- 請求項1~11のいずれか一項に記載の方法を含む、メンブランに担持されたペプチド化合物の製造方法。
- 請求項13に記載の方法によって、メンブランに担持された10種類以上のペプチド化合物を得る工程を含む、メンブランに担持されたペプチドライブラリの製造方法。
- 自動合成機を用いる、請求項13または14に記載の方法。
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| US18/854,568 US20250276995A1 (en) | 2022-04-08 | 2023-04-06 | Production method for peptide compound |
| JP2024514310A JPWO2023195516A1 (ja) | 2022-04-08 | 2023-04-06 | |
| EP23784800.7A EP4488283A1 (en) | 2022-04-08 | 2023-04-06 | Production method for peptide compound |
| CN202380022408.6A CN118715234A (zh) | 2022-04-08 | 2023-04-06 | 肽化合物的制造方法 |
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| EP (1) | EP4488283A1 (ja) |
| JP (1) | JPWO2023195516A1 (ja) |
| KR (1) | KR20240169679A (ja) |
| CN (1) | CN118715234A (ja) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12281141B2 (en) | 2017-06-09 | 2025-04-22 | Chugai Seiyaku Kabushiki Kaisha | Method for synthesizing peptide containing N-substituted amino acid |
| US12312379B2 (en) | 2021-05-07 | 2025-05-27 | Chugai Seiyaku Kabushiki Kaisha | Methods for producing cyclic compounds comprising N-substituted amino acid residues |
| US12404299B2 (en) | 2019-11-07 | 2025-09-02 | Chugai Seiyaku Kabushiki Kaisha | Method for producing peptide compound comprising highly sterically hindered amino acid |
| US12415835B2 (en) | 2011-12-28 | 2025-09-16 | Chugai Seiyaku Kabushiki Kaisha | Peptide-compound cyclization method |
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- 2023-04-06 WO PCT/JP2023/014205 patent/WO2023195516A1/ja not_active Ceased
- 2023-04-06 CN CN202380022408.6A patent/CN118715234A/zh active Pending
- 2023-04-06 TW TW112112844A patent/TW202402781A/zh unknown
- 2023-04-06 EP EP23784800.7A patent/EP4488283A1/en active Pending
- 2023-04-06 JP JP2024514310A patent/JPWO2023195516A1/ja active Pending
- 2023-04-06 KR KR1020247036206A patent/KR20240169679A/ko active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12415835B2 (en) | 2011-12-28 | 2025-09-16 | Chugai Seiyaku Kabushiki Kaisha | Peptide-compound cyclization method |
| US12281141B2 (en) | 2017-06-09 | 2025-04-22 | Chugai Seiyaku Kabushiki Kaisha | Method for synthesizing peptide containing N-substituted amino acid |
| US12404299B2 (en) | 2019-11-07 | 2025-09-02 | Chugai Seiyaku Kabushiki Kaisha | Method for producing peptide compound comprising highly sterically hindered amino acid |
| US12312379B2 (en) | 2021-05-07 | 2025-05-27 | Chugai Seiyaku Kabushiki Kaisha | Methods for producing cyclic compounds comprising N-substituted amino acid residues |
Also Published As
| Publication number | Publication date |
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| JPWO2023195516A1 (ja) | 2023-10-12 |
| TW202402781A (zh) | 2024-01-16 |
| EP4488283A1 (en) | 2025-01-08 |
| CN118715234A (zh) | 2024-09-27 |
| US20250276995A1 (en) | 2025-09-04 |
| KR20240169679A (ko) | 2024-12-03 |
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