AU2013215796B2 - Method for preparing compound by novel Michael addition reaction using water or various acids as additive - Google Patents
Method for preparing compound by novel Michael addition reaction using water or various acids as additive Download PDFInfo
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- AU2013215796B2 AU2013215796B2 AU2013215796A AU2013215796A AU2013215796B2 AU 2013215796 B2 AU2013215796 B2 AU 2013215796B2 AU 2013215796 A AU2013215796 A AU 2013215796A AU 2013215796 A AU2013215796 A AU 2013215796A AU 2013215796 B2 AU2013215796 B2 AU 2013215796B2
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002253 acid Substances 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000006845 Michael addition reaction Methods 0.000 title claims abstract description 11
- 239000000654 additive Substances 0.000 title abstract description 9
- 230000000996 additive effect Effects 0.000 title abstract description 9
- 150000007513 acids Chemical class 0.000 title abstract description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 21
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- 239000001257 hydrogen Substances 0.000 claims description 13
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 12
- 125000003545 alkoxy group Chemical group 0.000 claims description 11
- 125000004390 alkyl sulfonyl group Chemical group 0.000 claims description 10
- -1 amine compound Chemical class 0.000 claims description 10
- 125000001072 heteroaryl group Chemical group 0.000 claims description 10
- 150000002825 nitriles Chemical class 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 125000003118 aryl group Chemical group 0.000 claims description 9
- 125000004432 carbon atom Chemical group C* 0.000 claims description 9
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 9
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 125000000008 (C1-C10) alkyl group Chemical group 0.000 claims description 5
- 125000004391 aryl sulfonyl group Chemical group 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 5
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims description 4
- 125000005913 (C3-C6) cycloalkyl group Chemical group 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052794 bromium Inorganic materials 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 4
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 239000011541 reaction mixture Substances 0.000 claims description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 20
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 16
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 12
- 230000035484 reaction time Effects 0.000 description 9
- 238000003786 synthesis reaction Methods 0.000 description 9
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 235000019270 ammonium chloride Nutrition 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- IRSJDVYTJUCXRV-UHFFFAOYSA-N ethyl 2-bromo-2,2-difluoroacetate Chemical compound CCOC(=O)C(F)(F)Br IRSJDVYTJUCXRV-UHFFFAOYSA-N 0.000 description 8
- 101150041968 CDC13 gene Proteins 0.000 description 7
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 7
- 238000010992 reflux Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 230000002194 synthesizing effect Effects 0.000 description 5
- 125000000041 C6-C10 aryl group Chemical group 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- YVPKMLFMDHSTKJ-UHFFFAOYSA-N diethyl 2,2-difluoropentanedioate Chemical compound CCOC(=O)CCC(F)(F)C(=O)OCC YVPKMLFMDHSTKJ-UHFFFAOYSA-N 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000012776 electronic material Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 244000309464 bull Species 0.000 description 2
- FUSUHKVFWTUUBE-UHFFFAOYSA-N buten-2-one Chemical compound CC(=O)C=C FUSUHKVFWTUUBE-UHFFFAOYSA-N 0.000 description 2
- 125000002837 carbocyclic group Chemical group 0.000 description 2
- MVCFRKLRZBEPSV-UHFFFAOYSA-N ethyl 2,2-difluoro-3-methyl-5-oxoheptanoate Chemical compound CCOC(=O)C(F)(F)C(C)CC(=O)CC MVCFRKLRZBEPSV-UHFFFAOYSA-N 0.000 description 2
- IDZAHYPHKSGTBU-UHFFFAOYSA-N ethyl 2,2-difluoro-3-methyl-5-oxopentanoate Chemical compound CCOC(=O)C(F)(F)C(C)CC=O IDZAHYPHKSGTBU-UHFFFAOYSA-N 0.000 description 2
- YFIYHDGAHONZRV-UHFFFAOYSA-N ethyl 2,2-difluoro-5-oxohexanoate Chemical compound CCOC(=O)C(F)(F)CCC(C)=O YFIYHDGAHONZRV-UHFFFAOYSA-N 0.000 description 2
- 150000002221 fluorine Chemical class 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 description 1
- UXGVMFHEKMGWMA-UHFFFAOYSA-N 2-benzofuran Chemical compound C1=CC=CC2=COC=C21 UXGVMFHEKMGWMA-UHFFFAOYSA-N 0.000 description 1
- MGADZUXDNSDTHW-UHFFFAOYSA-N 2H-pyran Chemical compound C1OC=CC=C1 MGADZUXDNSDTHW-UHFFFAOYSA-N 0.000 description 1
- FEWIGMWODIRUJM-UHFFFAOYSA-N 4-hexen-3-one Chemical compound CCC(=O)C=CC FEWIGMWODIRUJM-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- DQFBYFPFKXHELB-UHFFFAOYSA-N Chalcone Natural products C=1C=CC=CC=1C(=O)C=CC1=CC=CC=C1 DQFBYFPFKXHELB-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000005513 chalcones Nutrition 0.000 description 1
- QZHPTGXQGDFGEN-UHFFFAOYSA-N chromene Chemical compound C1=CC=C2C=C[CH]OC2=C1 QZHPTGXQGDFGEN-UHFFFAOYSA-N 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- MLUCVPSAIODCQM-NSCUHMNNSA-N crotonaldehyde Chemical compound C\C=C\C=O MLUCVPSAIODCQM-NSCUHMNNSA-N 0.000 description 1
- MLUCVPSAIODCQM-UHFFFAOYSA-N crotonaldehyde Natural products CC=CC=O MLUCVPSAIODCQM-UHFFFAOYSA-N 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 125000000582 cycloheptyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- FWFSEYBSWVRWGL-UHFFFAOYSA-N cyclohex-2-enone Chemical compound O=C1CCCC=C1 FWFSEYBSWVRWGL-UHFFFAOYSA-N 0.000 description 1
- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002433 cyclopentenyl group Chemical group C1(=CCCC1)* 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical group 0.000 description 1
- UJTPZISIAWDGFF-UHFFFAOYSA-N ethenylsulfonylbenzene Chemical compound C=CS(=O)(=O)C1=CC=CC=C1 UJTPZISIAWDGFF-UHFFFAOYSA-N 0.000 description 1
- TVQFBZSFRXWHQN-UHFFFAOYSA-N ethyl 2,2-difluoro-2-(3-oxocyclohexyl)acetate Chemical compound CCOC(=O)C(F)(F)C1CCCC(=O)C1 TVQFBZSFRXWHQN-UHFFFAOYSA-N 0.000 description 1
- HBWOULPMYYITAQ-UHFFFAOYSA-N ethyl 4-(benzenesulfonyl)-2,2-difluorobutanoate Chemical compound CCOC(=O)C(F)(F)CCS(=O)(=O)C1=CC=CC=C1 HBWOULPMYYITAQ-UHFFFAOYSA-N 0.000 description 1
- CKXPGHFIUHPUEK-UHFFFAOYSA-N ethyl 4-cyano-2,2-difluorobutanoate Chemical compound CCOC(=O)C(F)(F)CCC#N CKXPGHFIUHPUEK-UHFFFAOYSA-N 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000004491 isohexyl group Chemical group C(CCC(C)C)* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 235000001508 sulfur Nutrition 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- DQFBYFPFKXHELB-VAWYXSNFSA-N trans-chalcone Chemical compound C=1C=CC=CC=1C(=O)\C=C\C1=CC=CC=C1 DQFBYFPFKXHELB-VAWYXSNFSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/34—Esters of acyclic saturated polycarboxylic acids having an esterified carboxyl group bound to an acyclic carbon atom
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B37/00—Reactions without formation or introduction of functional groups containing hetero atoms, involving either the formation of a carbon-to-carbon bond between two carbon atoms not directly linked already or the disconnection of two directly linked carbon atoms
- C07B37/02—Addition
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/58—Preparation of carboxylic acid halides
- C07C51/64—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/30—Preparation of carboxylic acid nitriles by reactions not involving the formation of cyano groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C315/00—Preparation of sulfones; Preparation of sulfoxides
- C07C315/04—Preparation of sulfones; Preparation of sulfoxides by reactions not involving the formation of sulfone or sulfoxide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C67/347—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by addition to unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/62—Use of additives, e.g. for stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The present invention relates to a novel method for preparing a compound represented by chemical formula 1 using water or various acids as an additive in a Michael addition reaction of a Michael receptor represented by chemical formula 2 and a compound represented by chemical formula 3.
Description
[SPECIFICATION] [Invention Title]
METHOD FOR PREPARING COMPOUND BY NOVEL MICHAEL ADDITION REACTION USING WATER OR VARIOUS ACIDS AS ADDITIVE
[Technical Field]
The present invention relates to a method for preparing a compound of Formula 1, which can be used as an intermediate of medicines, agricultural chemicals, electronic materials, liquid crystals and the like, through a novel Michael-addition reaction using water or a variety of acid as additive.
[Background Art]
Compound of Formula 1 has a variety of skeleton and biological activity, and thus it is widely used as an intermediate for synthesizing medicines, agricultural chemicals, electronic materials or liquid crystal materials, etc.
in which A is R1-C(=0)-, nitrile, substituted or unsubstituted C1-C10 alkylsulfonyl, or substituted or unsubstituted C6-C10 arylsulfonyl, where R1 is selected from the group consisting of hydrogen; substituted or unsubstituted C1-C10 alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-C10 aryl; substituted or unsubstituted 5-membered to 10-membered heteroaryl; and substituted or unsubstituted C1-C5 alkoxy; or when A is bonded to R3, A and R3 together with the carbon atoms to which they are attached form saturated or unsaturated C6-C10 cycloalkyl substituted with oxo(=0) group, R2, R3 and R4 are independently selected from the group consisting of hydrogen; substituted or unsubstituted C1-C10 alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-C10 aryl; substituted or unsubstituted 5-memberedto 10-membered heteroaryl; substituted or unsubstituted C1-C5 alkoxy; nitrile; and substituted or unsubstituted C1-C10 alkylsulfonyl, R5 and R6 are independently selected from the group consisting of hydrogen; halogen (i.e., F, Cl, Br, or I); and substituted or unsubstituted C1-C4 alkyl,
Pi is selected from the group consisting of benzyl, methyl, ethyl, i-propyl and t-butyl. A Compound of Formula 1 has an ester skeleton which can be easily substituted with other substrates and thus it is advantageously used in for synthesizing various organic compounds.. Therefore, methods for preparing compounds of Formula 1 have been studied widely, and various synthesis methods have been developed and reported in many literatures by organic synthesis chemists.
Among the compounds of Formula 1, those having organic fluorine derivatives are being studied actively, especially in Itsumaro Kumadaki group (Setsunan University, Japan). However, there are many limitations in synthesizing such compounds having organic fluorine derivatives through Michael-addition reaction. It may be said that the first one of such limitations is excessive use of copper powder (6 equivalents or more), the second one is relatively long reaction time (1 to 7 hours), and the last one is relatively low yield (20 to 70%). Thus, there might be a problem in terms of cost, time and the like when synthesizing them in a large scale by using the conventional reactions \Chem. Pharm. Bull. 1999, 47, 1023; Chem. Pharm. Bull. 2000, 48, 1023;./. Fluorine Chem. 2003, 727, 105;./. Fluorine Chem. 2004, 725, 509],
An example which is known for synthesizing compound of Formula 1 is, a method of reacting a compound of Formula 2 with a compound of Formula 3 through Michael-addition reaction using copper powder.
[Formula 2]
In the above formulas, A, R2 to R6 and Pi are the same as defined in Formula 1, and X is halogen (i.e., F, Cl, Br, or I).
However, conventional Michael-addition reactions simply using copper powder have shortcomings that a relatively long reaction time is needed and it is difficult to get a high yield due to generation of impurities.
[Detailed Description] [Technical Purpose]
The purpose of the present invention is to provide a novel method for preparing a compound of Formula 1 with a high yield.
[Technical Solution]
Thus, the present invention provides a novel method for preparing a compound of Formula 1. According to the present invention, provided is a method for preparing a compound of Formula 1 wherein water or acid or a mixture thereof is added to a reaction mixture for preparing the compound of Formula 1 through Michael-addition reaction between a compound of Formula 2 and a compound of Formula 3 in the presence of copper powder:
in which A is R1-C(=0)-, nitrile, substituted or unsubstituted C1-C10 alkylsulfonyl, or substituted or unsubstituted C6-C10 arylsulfonyl, where R1 is selected from the group consisting of hydrogen; substituted or unsubstituted C1-C10 alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-C10 aryl; substituted or unsubstituted 5-membered to 10-membered heteroaryl; and substituted or unsubstituted C1-C5 alkoxy; or when A is bonded to R3, A and R3 together with the carbon atoms to which they are attached form saturated or unsaturated C6-C10 cycloalkyl substituted with oxo(=0) group, R2, R3 and R4 are independently selected from the group consisting of hydrogen; substituted or unsubstituted C1-C10 alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-C10 aryl; substituted or unsubstituted 5-memberedto 10-membered heteroaryl; substituted or unsubstituted C1-C5 alkoxy; nitrile; and substituted or unsubstituted C1-C10 alkylsulfonyl, R5 and R6 are independently selected from the group consisting of hydrogen; halogen (i.e., F, Cl, Br, or I); and substituted or unsubstituted C1-C4 alkyl,
Pi is selected from the group consisting of benzyl, methyl, ethyl, i-propyl and t-butyl, and X is halogen.
As used herein ‘alkyl’ refers to a linear or branched carbon chain having 1 to 10 (or 1 to 4) carbon atoms. Specifically, it may include methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, pentyl, neo-pentyl, hexyl, isohexyl and the like.
Also as used herein ‘cycloalkyl’ refers to a saturated or partially unsaturated mono-or poly-carbocyclic ring structure having 3 to 10 ring carbon atoms. Specifically, it may include cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl and the like.
Also as used herein ‘aryl’ refers to an aromatic mono- or poly-carbocyclic ring structure having 6 to 10 ring carbon atoms. Specifically, it may include phenyl, naphthalenyl and the like.
Also as used herein ‘heteroaryf refers to an aromatic ring structure having 5 to 10 ring member atoms including 1 or 2 oxygens, nitrogens or sulfurs as a hetero atom(s). Specifically, it may include furan, pyran, isobenzofuran, chromene and the like.
Also as used herein ‘alkoxy’ refers to a linear or branched carbon chain having 1 to 5 carbon atoms to which a terminal oxygen is bound. Specifically, it may include methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, sec-butoxy, t-butoxy, pentoxy, neo-pentoxy and the like.
In the present invention, when A and R1 to R6 are substituted groups, it means they are substituted with one or more substituents selected from the group consisting of chloro, iodo, bromo, methyl, ethyl, n-propyl, isopropyl, butyl, methoxy, ethoxy, propoxy, butoxy, and acetyl.
In an embodiment of the present invention, in the above Formulas 1 and 2, A is independently R1-C(=0)-, nitrile, substituted or unsubstituted Ci-Cio alkylsulfonyl, or substituted or unsubstituted C6-C10 arylsulfonyl, where R1 is preferably selected from the group consisting of hydrogen; substituted or unsubstituted C1-C5 alkyl; substituted or unsubstituted C3-C6 cycloalkyl; substituted or unsubstituted CVCx aryl; substituted or unsubstituted 5-membered to 8-membered heteroaryl; and substituted or unsubstituted C1-C5 alkoxy; or when A is bonded to R3, A and R3 together with the carbon atoms to which they are attached form saturated or unsaturated C6-C10 cycloalkyl substituted with oxo(=0) group, and more preferably R2, R3 and R4 are independently selected from the group consisting of hydrogen; substituted or unsubstituted C1-C5 alkyl; substituted or unsubstituted C3-C6 cycloalkyl; substituted or unsubstituted CVCx aryl; substituted or unsubstituted 5-membered to 8-membered heteroaryl; substituted or unsubstituted C1-C5 alkoxy; nitrile; and substituted or unsubstituted C1-C10 alkylsulfonyl.
The method for preparing a compound of Formula 1 of the present invention is characterized in using water or a variety of acid as additive through Michael-addition reaction between a compound of Formula 2 and a compound of Formula 3 in the presence of copper powder,. In an embodiment of the present invention, for example, a compound of Formula 1 can be prepared according to the following Reaction Scheme 1.
[Reaction Scheme 1]
In the Reaction Scheme 1, a is copper powder, additive(water or a variety of acid), amine compound and a solvent, and A, R2, R3, R4, R5, R6, Pi and X are the same as defined above.
In the method for preparing a compound of Formula 1 of the present invention, the amount of copper powder used is not especially limited. Considering some conditions, it is preferably used in an amount of 1.0 to 6.0 equivalents, more preferably 2.0 equivalents or more with respect to 1 mole of compound of Formula 2.
In the method for preparing a compound of Formula 1 of the present invention, water or a variety of acid or a mixture thereof is used as specific additive for the reaction. Acids available in the present invention may include inorganic acid selected from hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid and the like; or organic acid which is selected from formic acid, acetic acid, tartaric acid and the like, and the acid may be used alone or in combination of two or more. Especially, considering the reaction stability, convenience, etc., it is preferable to use water or acetic acid as the additive. In the present invention, the water or acid is preferably used in an amount of 0.1 to 6.0 equivalents, more preferably 0.1 to 1 equivalent, with respect to 1 mole of the compound of Formula 2.
The method for preparing a compound of Formula 1 of the present invention can be carried out in the presence of amine compound. In this case, amine compound such as Ν,Ν,Ν’,iV’-tetramethylethylenediamine (TMEDA), N,N,N \N ’-tetramethyl-1,3-propanediamine (TMPDA), N, AN N N ’-pentamethyldiethylenetriamine (PMDTA), 2-(dimethylamino)ethyl ether, N, A'-dimethyl-2-(4-methyl-1-1 -piperazylyl)ethanamine and the like may be used, but it is not limited thereto. The amine compound is preferably used in an amount of 0.1 to 6.0 equivalents, more preferably 0.1 to 1 equivalent, with respect to 1 mole of the compound of Formula 2. In an embodiment of the present invention, TMEDA is used representatively.
Solvent used in the method for preparing a compound of Formula 1 of the present invention is a conventional organic solvent, and solvent such as acetonitrile, aliphatic nitriles, halogenated aliphatic hydrocarbons (for example, dichloromethane, dichloroethane, etc.) and cyclicethers (for example, tetrahydrofuran, 1,4-dioxane, etc.) may be used, but it is not limited thereto. In an embodiment of the present invention, tetrahydrofuran is used representatively.
Michael-addition reaction between a compound of Formula 2 and a compound of Formula 3 can be carried out at any temperature in a range of from 15 °C to the reflux temperature.
Although the reaction time of the present invention may vary according to reactants, type and amountof solvent, or the like, the present invention can curtail the reaction time in comparison with conventional methods under the same conditions. The reaction is terminated after confirming that all the compound of Formula 2, a starting material, are consumed by means of TLC, ^NMR, HPLC, GC, etc. If the reaction is terminated, the solvent is distilled under reduced pressure, and then the compound of Formula 1 can be separated and purified by means of conventional methods such as column chromatography, etc.
[Advantageous Effects]
According to the present invention, a compound of Formula 1 can be prepared by using water or a variety of acid or a mixture thereof as additive, which has not been tried so far, and the reaction time can be curtailed and the yield can be improved remarkably in comparison with conventional methods. Thus, a compound of Formula 1, which is useful as an intermediate of medicines, agricultural chemicals, electronic materials, liquid crystals and the like, can be produced in a commercial scale.
[Mode for Invention]
Hereinafter, the present invention will be described in more detail with reference to the following examples which are provided to facilitate understanding of the present invention. However, the scope of the present invention should not be construed to be limited thereby in any manner.
Example 1: Synthesis of diethyl 2.2-difluoropentanedioate
Copper powder (700 mg) and tetrahydrofuran (5.8 mL) were put in a reaction vessel and stirred at 50 °C, and ethyl acrylate (0.50 g) and ethyl bromodifluoroacetate (2.53 g) were added thereto, and then TMEDA (0.29 g) and acetic acid (0.27 g) were added dropwise thereto in this order. The reaction was conducted for 0.5 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain diethyl 2,2-difluoropentanedioate(1.09 g, yield: 97.4%).
In addition, excepting that water (0.10 g) was used instead of acetic acid, the same method as above was carried out to obtain diethyl 2.2-difluoropentanedioate (1.08 g, yield: 96.4%). ^NMR (400 MHz, CDC13) ¢51.26 (t, J=1.2 Hz, 3H), 1.37 (t, J=1.2 Hz, 3H), 2.37 -2.49 (m, 2H), 2.55 (t, J=1.2 Hz, 2H), 4.16 (q, J=1.2 Hz, 2H), 4.29 (q, J=1.2 Hz, 2H).
Example 2: Synthesis of ethyl 2.2-dif1uoro-2-(3-oxocvclohexvl )acetate
Copper powder (1.65 g) and tetrahydrofuran (7.60 mL) were put in a reaction vessel and stirred under a reflux condition, 2-cyclohexene-1-on (0.50 g) and ethyl bromodifluoroacetate (2.64 g) were added thereto, and then TMEDA (0.30 g) and acetic acid (0.28 g) were added dropwise thereto in this order. The reaction was conducted for 4 hours and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl 2,2-difluoro-2-(3-oxocyclohexyl)acetate (1.12 g, yield: 97.8%). hffNMR (400 MHz, CDC13) ¢54.35 (q, J= 7.0 Hz, 2H), 2.70 - 1.66 (m, 9H), 1.37 (t, J= 7.0 Hz, 3H)
Example 3: Synthesis of ethyl 2.2-difluoro-3-methyl-5-oxoheptanoate
Copper powder (1.94 g) and tetrahydrofuran (7.4 mL) were put in a reaction vessel and stirred under a reflux condition, 4-hexene-3-on (0.50 g) and ethyl bromodifluoroacetate (2.59 g) were added thereto, and then TMEDA (0.30 g) and acetic acid (0.28 g) were added dropwise thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl 2,2-difluoro-3-methyl-5-oxoheptanoate (1.04 g, yield: 91.9%). ^NMR (400 MHz, CDC13) ¢54.32 (q, J= 7.0 Hz, 2H), 2.97 - 2.84 (m, 1H), 2.77 (dd, J=17.7, 4.0 Hz, 1H), 2.48 -2.38 (m, 3H), 1.36 (t, J=7.0 Hz, 3H), 1.07 (t, J=7.3 Hz, 3H), 1.01 (d, J=7.0 Hz, 3H)
Example 4: Synthesis of ethyl-2.2-difluoro-5-oxohexanoate
Copper powder (0.48 g) and tetrahydrofuran (5.21 mL) were put in a reaction vessel and stirred at room temperature, methyl vinyl ketone (0.25 g) and ethyl bromodifluoroacetate (1.14 mL) were added thereto, and then TMEDA (0.21 g) and acetic acid (0.19 g) were added dropwise thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl-2,2-difluoro-5-oxohexanoate (0.63 g, yield: 91.0%). ^NMR (400 MHz, CDC13) ¢54.32 (q, J= 7.0 Hz, 2H), 2.69 (t, J=1.9 Hz, 2H), 2.43 -2.31 (m, 2H), 2.19 (s, 3H), 1.35 (t, J= 7.0 Hz, 3H)
Example 5: Synthesis of ethyl-4-cvano-2.2-difluorobutanoate
Copper powder (1.26 g) and tetrahydrofuran (13.8 mL) were put in a reaction vessel and stirred at room temperature, acrylonitrile (0.50 g) and ethyl bromodifluoroacetate (4.78 g) were added drop wise thereto, and then TMEDA (0.55 g) and acetic acid (0.51 g) were added thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl-4-cvano-2.2-difluorobutanoate (1.52 g, yield: 91.1%).
In addition, excepting that water (0.17 g) was used instead of acetic acid, the same method as above was carried out to obtain ethyl-4-cyano-2,2-difluorobutanoate (1.48 g, yield: 88.7%). ^NMR (400 MHz, CDC13) ¢54.37 (q, J= 7.0 Hz, 2H), 2.62 (t, J=7.6 Hz, 2H), 2.48 (m, 2H), 1.38 (t, J= 7.0 Hz, 3H)
Example 6: Synthesis of ethyl 2.2-difluoro-3-methyl-5-oxopentanoate
Copper powder (1.81 g) and tetrahydrofuran (10.40 mL) were put in a reaction vessel and stirred under a reflux condition, crotonaldehyde (0.50 g) and ethyl bromodifluoroacetate (3.62 g) were added dropwise thereto, and then TMEDA (0.41 g) and acetic acid (0.39 g) were added thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl 2.2-difluoro-3-methyl-5-oxopentanoate (0.79 g, yield: 57.0%). ^NMR (400 MHz, CDC13) δ9.ΊΊ (s, 1H), 4.34 (1, 7= 7.0 Hz, 2H), 3.02 - 2.87 (m, 1H), 2.84 (dd, 7=18.0. 4.0 Hz, 1H), 2.46 (ddd, 7=18.0, 8.8, 2.6 Hz, 1H), 1.36 (t, 7=7.0 Hz, 3H), 1.08 (d, 7=7.0 Hz, 3H)
In this example, 34% improvement in yield and 2 hours curtailment of reaction time were achieved in comparison with the yield (23%) and reaction time (3 hours) of a prior art (7 Fluorine Chem. 2003, 727, 105).
Example 7: Synthesis of ethyl 2.2-difluoro-5-exo-3-phenylhexanoate
Copper powder (0.32 g) and tetrahydrofuran (10.4 mL) were put in a reaction vessel and stirred under a reflux condition, chalcone (0.50 g) and ethyl bromodifluoroacetate (1.22 g) were added drop wise thereto, and then TMEDA (0.14 g) and acetic acid (0.13 g) were added thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl 2,2-difluoro-5-exo-3-phenylhexanoate (833 mg, yield: 34.8%). NMR (400 MHz, CDC13) δ7.94 - 7.92 (m, 2H), 7.57 - 7.53 (m, 1H), 7.46 - 7.43 (m, 2H), 7.37 - 7.35 (m, 2H), 7.29 - 7.23 (m, 2H), 4.36 - 4.24 (m, 1H), 4.14 (q, 7=7.0 Hz, 2H), 3.67 (s, 1H), 3.65 (d, 7=2.4 Hz, 1H), 1.14 (t, 7=7.0 Hz, 3H)
In this example, 11.8% improvement in yield was achieved in comparison with the yield (23%) of a prior art (,J.. Fluorine Chem. 2003, 727, 105). The reaction time of this example (1 hour) was the same as that of the prior art. However, the prior art needs a step of stirring the reactants for 1 hour and then adding TMEDA thereto, whereas the present invention does not need such a step, and thus the total reaction time could be further curtailed substantially.
Example 8: Synthesis of ethyl 2.2-difluoro-4-(phenvlsulfonyl Ibutanoate
Copper powder (0.40 g) and tetrahydrofuran (4.40 mL) were put in a reaction vessel and stirred at 50 °C, phenyl vinyl sulfone (0.50 g) and ethyl bromodifluoroacetate (1.51 g) were added dropwise thereto, and then TMEDA (0.17 g) and acetic acid (0.16 g) were added thereto in this order. The reaction was conducted for 1 hour and then terminated. To the resulting mixture an aqueous solution of 10% ammonium chloride was added, and the resulting mixture was filtered by using celite pad to remove copper residue, and extracted with methyl t-butyl ether to obtain ethyl 2,2-difluoro-4-(phenylsulfonyl)butanoate (0.74 g, yield: 85.2%). ^NMR (400 MHz, DMSO) £7.98 - 9.96 (m, 2H), 7.80 (tt, J=1.4, 1.2 Hz, 1H), 7.72 - 7.65 (m, 2H), 4.27 (q, J= 7.0 Hz, 2H), 3.57 - 3.48 (m, 2H), 2.50 - 2.40 (m, 2H), 1.24 (t, J= 7.0 Hz, 3H)
Claims (7)
- [CLAIMS] [CLAIM 1] A method for preparing a compound of Formula 1 wherein water or acid or a mixture thereof is added to a reaction mixture for preparing the compound of Formula 1 through Michael-addition reaction between a compound of Formula 2 and a compound of Formula 3 in the presence of copper powder:in which A is R1-C(=0)-, nitrile, substituted or unsubstituted Ci-Cio alkylsulfonyl, or substituted or unsubstituted C6-Ci0 arylsulfonyl, where R1 is selected from the group consisting of hydrogen; substituted or unsubstituted Ci-Cio alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-Ci0 aryl; substituted or unsubstituted 5-membered to 10-membered heteroaryl; and substituted or unsubstituted C1-C5 alkoxy; or when A is bonded to R3, A and R3 together with the carbon atoms to which they are attached form saturated or unsaturated C6-Ci0 cycloalkyl substituted with oxo (=0) group, R2, R3 and R4 are independently selected from the group consisting of hydrogen; substituted or unsubstituted C1-C10 alkyl; substituted or unsubstituted C3-C10 cycloalkyl; substituted or unsubstituted C6-Ci0 aryl; substituted or unsubstituted 5-membered to 10-membered heteroaryl; substituted or unsubstituted C1-C5 alkoxy; nitrile; and substituted or unsubstituted C1-C10 alkylsulfonyl, R5 and R6 are independently selected from the group consisting of hydrogen; halogen (i.e., F, Cl, Br, or I); and substituted or unsubstituted C1-C4 alkyl, Pi is selected from the group consisting of benzyl, methyl, ethyl, i-propyl and t-butyl, and X is halogen. [CLAIM
- 2] The method according to claim 1, wherein A is R1-C(=0)-, nitrile, substituted or unsubstituted C1-C10 alkylsulfonyl, or substituted or unsubstituted C6-C10 arylsulfonyl, where R1 is selected from the group consisting of hydrogen; substituted or unsubstituted C1-C5 alkyl; substituted or unsubstituted C3-C6 cycloalkyl; substituted or unsubstituted Ο,-Cx aryl; substituted or unsubstituted 5-membered to 8-membered heteroaryl; and substituted or unsubstituted C1-C5 alkoxy; or when A is bonded to R3, A and R3 together with the carbon atoms to which they are attached form saturated or unsaturated C6-C10 cycloalkyl substituted with oxo (=0) group, and R2, R3 and R4 are independently selected from the group consisting of hydrogen; substituted or unsubstituted C1-C5 alkyl; substituted or unsubstituted C3-C6 cycloalkyl; substituted or unsubstituted CL-Cx aryl; substituted or unsubstituted 5-membered to 8-membered heteroaryl; substituted or unsubstituted C1-C5 alkoxy; nitrile; and substituted or unsubstituted C1-C10 alkylsulfonyl. [CLAIM
- 3] The method according to claim 1, wherein the copper powder is used in an amount of 1.0 to 6.0 equivalents with respect to 1 mole of the compound of Formula 2. [CLAIM
- 4] The method according to claim 1, wherein the acid is inorganic acid selected from hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid; organic acid selected from formic acid, acetic acid and tartaric acid; or a mixture thereof. [CLAIM
- 5] The method according to claim 1, wherein the water or acid is used in an amount of 0.1 to 6 equivalents with respect to 1 mole of the compound of Formula 2. [CLAIM
- 6] The method according to any of claims 1 to 5, wherein amine compound is further added to the reaction mixture during the reaction of the compound of Formula 2 and the compound of Formula 3. [CLAIM
- 7] The method according to claim 6, wherein tetramethylethylenediamine is used in an amount of 0.1 to 6 equivalents with respect to 1 mole of the compound of Formula 2.
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| Title |
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| MOENS M. et al., Tetrahedron., 2012, Vol. 68(45), Pages 9284-9288 * |
| SATO K. et al, Journal of Fluorine Chemistry., 2003, Vol. 121(1), Pages 105-107 * |
| SURMONT R. et al, Journal of Organic Chemistry., 2010, Vol. 75(3), Pages 929-932 * |
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| BR112014018985B1 (en) | 2021-01-19 |
| MX2014009309A (en) | 2014-11-10 |
| KR20130090360A (en) | 2013-08-13 |
| EA026411B1 (en) | 2017-04-28 |
| AU2013215796A1 (en) | 2014-08-21 |
| SG11201404396TA (en) | 2015-06-29 |
| BR112014018985A2 (en) | 2017-06-20 |
| CL2014002029A1 (en) | 2014-12-26 |
| PH12014501704A1 (en) | 2014-10-13 |
| CO7030967A2 (en) | 2014-08-21 |
| BR112014018985A8 (en) | 2017-07-11 |
| MA35906B1 (en) | 2014-12-01 |
| PE20142331A1 (en) | 2015-01-17 |
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