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US20140011995A1 - Process for Preparing Compound Having HIV Integrase Inhibitory Activity - Google Patents

Process for Preparing Compound Having HIV Integrase Inhibitory Activity Download PDF

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Publication number
US20140011995A1
US20140011995A1 US13/814,333 US201113814333A US2014011995A1 US 20140011995 A1 US20140011995 A1 US 20140011995A1 US 201113814333 A US201113814333 A US 201113814333A US 2014011995 A1 US2014011995 A1 US 2014011995A1
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substituent
formula
optionally substituted
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salt
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Inventor
Yukihito Sumino
Moriyasu Masui
Diasuke Yamada
Fumiya Ikarashi
Kazuya Okamoto
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Shionogi and Co Ltd
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Shionogi and Co Ltd
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Assigned to SHINOGI & CO., LTD reassignment SHINOGI & CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IKARASHI, FUMIYA, MASUI, MORIYASU, OKAMOTO, KAZUYA, SUMINO, YUKIHITO, YAMADA, DAISUKE
Publication of US20140011995A1 publication Critical patent/US20140011995A1/en
Priority to US15/709,701 priority Critical patent/US10000508B2/en
Priority to US15/709,742 priority patent/US9969750B2/en
Priority to US15/709,716 priority patent/US10125146B2/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D498/12—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains three hetero rings
    • C07D498/14—Ortho-condensed systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
    • A61K31/5365—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with heterocyclic ring systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A61P31/14—Antivirals for RNA viruses
    • A61P31/18—Antivirals for RNA viruses for HIV
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/92—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with a hetero atom directly attached to the ring nitrogen atom
    • C07D211/94—Oxygen atom, e.g. piperidine N-oxide
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79—Acids; Esters
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79—Acids; Esters
    • C07D213/80—Acids; Esters in position 3
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
    • C07B2200/13—Crystalline forms, e.g. polymorphs

Definitions

  • the present invention relates to a method of producing compounds having HIV integrase inhibitory activity, using a novel method of producing pyrone derivatives and pyridone derivatives.
  • Patent Document 1 describes compounds (I) and (II), which are useful as anti-HIV drugs and shown by formulae:
  • Patent Documents 2 to 6 describe the following reaction formula as an improved method of producing compound (I).
  • reaction processes for obtaining compound (I) include 16 or 11 steps, respectively, and are very long, the total yield is low, thus being inefficient, a high toxic and harmful reaction is used. an expensive reagent is used, an environmentally harmful reagent is used.
  • Non-Patent Documents 1 and 2 describe a method of producing pyrane-4-one and pyridine 4-one.
  • Patent Document 7 and Non-Patent Document 3 describe a method of producing enaminone derivatives.
  • a method of producing pyronediester and pyridonediester of the present invention is not described in these documents.
  • Patent Document 8 is an international patent application by the present applicant. Though this document describes the method of producing pyronediester and pyridonediester identical to the present invention, compounds having HIV-integrase inhibitory activity and anti-HIV drugs are not described therein.
  • An object of the present invention is to efficiently produce compounds useful as an anti-HIV drug having HIV-integrase inhibitory activity, which are shown by formula (Y1) or formula (Y2), a pharmaceutically acceptable salt thereof, or their solvate, by using a novel pyrone derivative and a pyridone derivative, a method of producing the same, and a method of using the same:
  • R x is carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E.
  • Substituent E halogen, cyano, hydroxy, carboxy, formyl, amino, oxo, nitro, lower alkyl, halogeno lower alkyl, lower alkyloxy, carbocyclyl optionally substituted by substituent F, heterocyclyl optionally substituted by substituent F, carbocyclyl lower alkyloxy optionally substituted by substituent F, heterocyclyl lower alkyloxy optionally substituted by substituent F, carbocyclyl lower alkylthio optionally substituted by substituent F, heterocyclyl lower alkylthio optionally substituted by substituent F, carbocyclyl lower alkylamino optionally substituted by substituent F, heterocyclyl lower alkylamino optionally substituted by substituent F, carbocyclyloxy optionally substituted by substituent F, heterocyclyloxy optionally substituted by substituent F, carbocyclylcarbonyl optionally substituted by substituent F, heterocyclylcarbonyl optionally substituted by
  • the prevent invention provides the following items, which relate to a production method shown by the following reaction formula:
  • R x is carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E, and substitutent E is as defined below) comprising a step of:
  • R 1d is hydrogen, halogen, lower alkyloxy optionally substituted by substituent E, carbocyclyl lower alkyloxy optionally substituted by substituent E, heterocyclyl lower alkyloxy optionally substituted by substituent E, or —OSi(R 1e) 3
  • R 1e s are each independently lower alkyl optionally substituted by substituent E, carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E
  • R 2d is hydrogen, lower alkyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E
  • R 3d is hydrogen, lower alkyloxy optionally substituted by substituent E, —N(R 3e ) 2 , —OR 3e
  • Substituent E halogen, cyano, hydroxyl, carboxy, formyl, amino, oxo, nitro, lower alkyl, halogeno lower alkyl, lower alkyloxy, carbocyclyl optionally substituted by substituent F, heterocyclyl optionally substituted by substituent F, carbocyclyl lower alkyloxy optionally substituted by substituent F, heterocyclyl lower alkyloxy optionally substituted by substituent F, carbocyclyl lower alkylthio optionally substituted by substituent F, heterocyclyl lower alkylthio substituted by substituent F, carbocyclyl lower alkylamino optionally substituted by substituent F, heterocyclyl lower alkylamino optionally substituted by substituent F, carbocyclyloxy optionally substituted by substituent F, heterocyclyloxy optionally substituted by substituent F, carbocyclylcarbonyl optionally substituted by substituent F, heterocyclylcarbonyl optionally substituted by substitu
  • R 4d is lower alkyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E
  • R 5d is hydrogen, halogen, lower alkyloxy optionally substituted by substituent E, or —O—SO 2 —R 5e
  • R 5e is lower alkyl optionally substituted by substituent E, carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl substituted by substituent E
  • Substituent E is as defined above
  • a method according to Item 1 comprising a step of:
  • a method according to Item 4 comprising a step of:
  • a method according to Item 3 or 5 comprising a step of:
  • Step B and Step C are continuously performed.
  • a method according to Item 8 comprising a step of:
  • a method according to Item 9 comprising a step of:
  • a method according to Item 10 comprising a step of:
  • Hal is a halogen atom
  • the present invention provides the following items as other embodiments.
  • R x is carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl substituted by substituent E, and substituent E is as defined below
  • R 1d is hydrogen, halogen, lower alkyloxy optionally substituted by substituent E, carbocyclyl lower alkyloxy optionally substituted by substituent E, heterocyclyl lower alkyloxy optionally substituted by substituent E, or —OSi(R 1e ) 3
  • R 1e s are each independently lower alkyl optionally substituted by substituent E, carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl substituted by substituent E
  • Red is hydrogen, lower alkyl optionally substituted by substituent E, carbocyclyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E
  • R 3d is hydrogen, lower alkyloxy optionally substituted by substituent E, —N(R 3e ) 2 , or —OR 3e , R 3e s are
  • Substituent E halogen, cyano, hytroxy, carboxy, formyl, amino, oxo, nitro, lower alkyl, helogeno lower alkyl, lower alkyloxy, carbocyclyl optionally substituted by substituent F, heterocyclyl optionally substituted by substituent F, carbocyclyl lower alkyloxy optionally substituted by substituent F, heterocyclyl lower alkyloxy optionally substituted by substituent F, carbocyclyl lower alkylthio optionally substituted by substituent F, heterocyclyl lower alkylthio substituted by substituent F, carbocyclyl lower alkylamino optionally substituted by substituent F, heterocyclyl lower alkylamino optionally substituted by substituent F, carbocyclyloxy optionally substituted by substituent F, heterocyclyloxy optionally substituted by substituent F, csrbocyclylcarbonyl optionally substituted by substituent F, heterocyclylcarbon
  • R 4d is lower alkyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl substituted by substituent E
  • R 6d is hydrogen, halogen, lower alkyloxy substituted by substituent E, or —O—SO 2 —R 5e
  • R 5e is lower alkyl optionally substituted by substituent E, carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E, and substituent E is as defined above
  • substituent E is as defined above
  • the present invention enables production of compound (Y1) and compound (Y2) useful as anti-HIV drugs having HIV integrase inhibitory activity in a short step as compared to conventional methods, so the compounds can be efficiently produced in a high yield.
  • the present invention has a number of advantages, that use of a reaction reagent with toxicity can be avoided, use of harmful reaction can be avoided, use of an expensive reaction reagent can be avoided, use of an environmentally harmful reagent and solvent can be avoided, and the like. Therefore, the present invention is useful for the industrial production of anti-HIV drugs.
  • the crystals of compound (U1), compound (U2), and compound (U3) according to the present invention have advantages such as high stability to heat, high stability to light, high purification effect to remove impurities, easy handling, and/or small hygroscopy, and therefore, can be efficiently produced by utilizing those advantages.
  • FIG. 1 is a powder X-ray diffraction pattern of compound 12B obtained in Step 1 of Example 12.
  • the ordinate represents peak intensity, and the abscissa represents a diffraction angle (2 ⁇ ).
  • FIG. 2 is a powder X-ray diffraction pattern of compound 15A obtained in Example 15A.
  • the ordinate represents peak intensity, and the abscissa represents a diffraction angle (2 ⁇ ).
  • FIG. 3 is a powder X-ray diffraction pattern of compound 15B obtained in Example 15B.
  • the ordinate represents peak intensity, and the abscissa represents a diffraction angle (2 ⁇ ).
  • halogen encompasses fluorine, chlorine, bromine, and iodine atoms.
  • lower alkyl encompasses linear or branched alkyl having 1 to 15 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms, further preferably 1 to 4 carbon atoms, most preferably 1 or 2 carbon atoms.
  • Examples thereof include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, neopentyl, hexyl, isohexyl, n-heptyl, isoheptyl, n-octyl, isooctyl, n-nonyl, and n-decyl.
  • lower alkyl examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and n-pentyl. Examples of more preferred embodiments thereof include methyl, ethyl, n-propyl, isopropyl, and tert-butyl.
  • lower alkenyl encompasses linear or branched alkenyl having 2 to 15 carbon atoms, preferably 2 to 10 carbon atoms, more preferably 2 to 6 carbon atoms, further preferably 2 to 4 carbon atoms and having one or more double bonds at an arbitrary position.
  • the “lower alkenyl” encompasses vinyl, allyl, propenyl, isopropenyl, butenyl, isobutenyl, prenyl, butadienyl, pentenyl, isopentenyl, pentadienyl, hexenyl, isohexenyl, hexadienyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, and the like.
  • Examples of preferred embodiments of “lower alkenyl” include vinyl, allyl, propenyl, isopropenyl, and butenyl. Examples of particularly preferred embodiments thereof include allyl.
  • lower allyl moieties of “lower alkyloxy”, “lower alkylcarbonyl”, “lower alkyloxycarbonyl”, “carbocyclyl lower alkyl”, “heterocyclyl lower alkyl”, “halogeno lower alkyl”, “carbocyclyl lower alkyloxy”, “heterocyclyl lower alkyloxy”, “halogeno lower alkyloxy”, “lower alkyloxy lower alkyl”, “lower alkyloxy lower alkyloxy”, “lower alkylamino”, “lower alkylcarbonylamino”, “lower alkylaminocarbonyl”, “lower alkylsulfonyl”, “lower alkylsulfonylamino”, “carbocyclyl lower alkylthio”, “heterocyclyl lower alkylthio”, “carbocyclyl lower alkylamino”, and “heterocyclyl lower alkylamino” are also the same as
  • halogeno lower alkyl and “halogeno lower alkyloxy” are also the same as the “halogen” described above.
  • the “lower alkyl” and the “lower alkyloxy” may be substituted by one halogen atom or more identical or different halogen atoms at their respective arbitrary positions on the alkyl groups.
  • Carbocyclyl means carbocyclyl having 3 to 20 carbon atoms, preferably 3 to 16 carbon atoms, more preferably 4 to 12 carbon atoms and encompasses cycloalkyl, cycloalkenyl, aryl, non-aromatic condensed carbocyclyl, and the like.
  • cycloalkyl means carbocyclyl having 3 to 16 carbon atoms, preferably 3 to 12 carbon atoms, more preferably 4 to 8 carbon atoms and encompasses, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, and cyclodecyl.
  • cycloalkenyl encompasses a group having one or more double bonds at an arbitrary position in the ring of the cycloalkyl. Examples thereof include cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl, cycloheptynyl, cyclooctynyl, and cyclohexadienyl.
  • aryl encompasses phenyl, naphthyl, anthryl, phenanthryl, and the like. Particularly, phenyl is preferred.
  • non-aromatic condensed carbocyclyl encompasses a group in which two or more cyclic groups selected from the “cycloalkyl”, “cycloalkenyl”, and “aryl” described above are condensed. Examples thereof include indanyl, indenyl, tetrahydronaphthyl, fluorenyl, and adamantyl.
  • Carbocyclyl examples include cycloalkyl, aryl, and non-aromatic condensed carbocyclyl. Specific examples thereof include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and phenyl.
  • carbocyclyl moieties of “carbocyclyl lower alkyl”, “carbocyclyl lower alkyloxy”, “carbocyclyl lower alkylthio”, “carbocyclyl lower alkylamino”, “carbocyclyloxy”, “carbocyclylcarbonyl”, and “carbocyclylaminocarbonyl” are also the same as the ‘carbocyclyl’ described above.
  • the “carbocyclyl lower alkyl” in particularly preferred embodiments is benzyl.
  • Examples of preferred embodiments of “carbocyclyl lower alkyloxy” include benzyloxy.
  • Examples of preferred embodiments of “carbocyclyl lower alkylthio” include benzylthio.
  • Examples of preferred embodiments of “carbocyclyl lower alkylamino” include benzylamino.
  • Examples of preferred embodiments of “carbocyclyloxy” include phenyloxy.
  • Examples of preferred embodiments of “carbocyclylcarbonyl” include phenylcarbonyl.
  • Examples of preferred embodiments of “carbocyclylaminocarbonyl” include phenylaminocarbonyl.
  • heterocyclyl encompasses heterocyclyl having, in the ring, one or more identical or different heteroatoms arbitrarily selected from O, S, and N, such as heteroaryl, none-aromatic heterocyclyl, bicyclic condensed heterocyclyl, and tricyclic condensed heterocyclyl.
  • heteroaryl examples include 5- to 6-membered aromatic cyclyl such as pyrrolyl, imidazolyl, pyrazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazolyl, triazinyl, tetrazolyl, furyl, thienyl, isoxazolyl, oxazolyl, oxadiazolyl, isothiazolyl, thiazolyl, and thiadiazolyl.
  • aromatic cyclyl such as pyrrolyl, imidazolyl, pyrazolyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazolyl, triazinyl, tetrazolyl, furyl, thienyl, isoxazolyl, oxazolyl, oxadiazolyl, isothiazolyl, thiazo
  • Examples of the “none-aromatic heterocyclyl” include dioxanyl, thiiranyl, oxiranyl, oxetanyl, oxathiolanyl, azetidinyl, thianyl, thiazolidinyl, pyrrolidinyl, pyrrolinyl, imidazolidinyl, imidazolinyl, pyrazolidinyl, pyrazolinyl, piperidyl, piperazinyl, morpholinyl, morpholino, thiomorpholinyl, thiomorpholino, dihydropyridyl, tetrahydropyridyl, tetrahydrofuryl, tetrahydropyranyl, dihydrothiazolyl, tetrahydrothiazolyl, tetrahydroisothiazolyl, dihydrooxazinyl, hexahydroazepinyl,
  • bicyclic condensed heterocyclyl examples include indolyl, isoindolyl, indazolyl, indolizinyl, indolinyl, isoindolinyl, quinolyl, isoquinolyl, cinnolinyl, phthalazinyl, quinazolinyl, naphthyridinyl, quinoxalinyl, purinyl, pteridinyl, benzopyranyl, benzimidazolyl, benzotriazolyl, benzisoxazolyl, benzoxazolyl, benzoxadiazolyl, benzisothiazolyl, benzothiazolyl, benzothiadiazolyl, benzofuryl, isobenzofuryl, benzothienyl, benzotriazolyl, thienopyridyl, thienopyrrolyl, thienopyrazolyl, thienopyrazinyl,
  • tricyclic condensed heterocyclyl examples include carbazolyl, acridinyl, xanthenyl, phenothiazinyl, phenoxathiinyl, phenoxazinyl, dibenzofuryl, imidazoquinolyl, and tetrahydrocarbazolyl.
  • heterocyclyl examples include 5- to 6-membered heteroaryl or none-aromatic heterocyclyl, and tricyclic condensed heterocyclyl.
  • heterocyclyl moieties of “heterocyclyl lower alkyl”, “heterocyclyl lower alkyloxy”, “heterocyclyl lower alkylthio”, “heterocyclyl lower alkylamino”, “heterocyclyloxy”, “heterocyclylcarbonyl”, and “heterocyclylaminocarbonyl” are also the same as the “heterocyclyl” described above.
  • the “heterocyclyl lower alkyl” in particularly preferred embodiments is pyridylmethyl.
  • heterocyclyl lower alkyloxy examples include pyridylmethyloxy.
  • heterocyclyl lower alkylthio examples include pyridylmethylthio.
  • heterocyclyl lower alkylamino examples include pyridylmethylamino.
  • heterocyclyloxy examples include pyridyloxy.
  • heterocyclylcarbonyl examples include pyridylcarbonyl.
  • heterocyclylaminocarbonyl examples include pyridylaminocarbonyl.
  • Step B and Step C are continuously performed.
  • Step C is carried out without performing the isolation operation (e.g., crystallization and collection by filtration, and distillation), extraction operation, and column chromatography purification of the product of Step B.
  • Step B and Step C may be performed in the same or different reactors.
  • lower alkyl optionally substituted by substituent E means that “lower alkyl” is unsubstituted or is bonded to one or more chemically acceptable substituents selected from substituent E. When the lower alkyl is bonded to a plurality of substituents, these substituents may be the same as or different from each other. Examples thereof include methyl, fluoromethyl, trifluoromethyl, chlorodifluoromethyl, and
  • carbocyclyl optionally substituted by substituent E means that “carbocyclyl” is unsubstituted or is bonded to one or more chemically acceptable substituents selected from substituent E. When the carbocyclyl is bonded to a plurality of substituents, these substituents may be the same as or different from each other.
  • the “carbocyclyl optionally substituted by substituent E” encompasses, for example, fluorophenyl, difluorophenyl, and methoxyfluorophenyl.
  • carbocyclyl lower alkyl optionally substituted by substituent E means that “carbocyclyl” and/or “lower alkyl” is unsubstituted or is bonded to one or more chemically acceptable substituents selected from substituent E. When the carbocyclyl and/or the lower alkyl is bonded to a plurality of substituents, these substituents may be the same as or different from each other.
  • the “carbocyclyl lower alkyl optionally substituted by substituent E” encompasses, for example, 4-fluorobenzyl, 2,4-difluorobenzyl, 4-methoxy-2-fluorobenzyl, and 4-methoxyphenyldifluoromethyl.
  • lower alkyloxy optionally substituted by substituent E “carbocyclyl lower alkyloxy optionally substituted by substituent E”, “heterocyclyl lower alkyloxy optionally substituted by substituent E”, and “lower alkenyl optionally substituted by substituent E” are also defined similarly.
  • carbocyclyl optionally substituted by substituent F means that ‘carbocyclyl’ is unsubstituted or is bonded to one or more chemically acceptable substituents selected from substituent F. When the carbocyclyl is bonded to a plurality of substituents, these substituents may be the same as or different from each other.
  • the “carbocyclyl optionally substituted by substituent F” encompasses, for example, fluorophenyl, difluorophenyl, and methoxyfluorophenyl.
  • carbocyclyl lower alkyloxy optionally substituted by substituent F means that the ‘carbocyclyl’ moiety is unsubstituted or is bonded to one or more chemically acceptable substituents selected from substituent F. When the carbocyclyl moiety is bonded to a plurality of substituents, these substituents may be the same as or different from each other.
  • the “carbocyclyl lower alkyloxy optionally substituted by substituent F” encompasses, for example, fluorobenzyloxy, difluorobenzyloxy, and methoxyfluorobenzyloxy.
  • amino protective group can be any general protective group for the amino group and exemplified by amino protective groups described in, for example, Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons).
  • the “amino protective group” is preferably a tert-butyloxycarbonyl or benzyloxycarbonyl group.
  • the “carboxyl protective group” can be any general protective group for the carboxyl group and exemplified by carboxyl protective groups described in, for example, Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons). Preferred examples thereof include methyl, ethyl, tert-butyl, methoxymethyl, allyl, benzyl, and p-methoxybenzyl groups.
  • Examples of the “counter anion of ammonium cation” represented by X d include halogen ⁇ , CH 3 COO ⁇ , HCOO ⁇ , NO 3 ⁇ , BF 4 ⁇ , PF 6 ⁇ , HO ⁇ , Ph-SO 3 ⁇ , CH 3 -Ph-SO 3 ⁇ , CH 3 —SO 3 ⁇ , PO 4 3 ⁇ , SO 4 2 ⁇ and HSO 4 ⁇ .
  • the “counter anion of ammonium cation” is preferably halogen ⁇ , CH 3 COO ⁇ , NO 3 ⁇ , or SO 4 2 ⁇ .
  • the counter anion represents that each NH 4 + cation is in an uncharged state by the binding of two or three molecules thereof.
  • NH 4 + X d ⁇ include NH 4 + Cl ⁇ , NH 4 + CH 3 COO ⁇ , (NH 4 + ) 2 SO 4 2 ⁇ , and (NH 4 + ) 3 PO 4 3 ⁇ .
  • the “leaving group” refers to a substituent that is eliminated through nucleophilic reaction. Examples thereof include halogen, —O—SO 2 —CH 3 , —O—SO 2 —CF 3 , —O—SO 2 -Ph, and —O—SO 2 -Ph-CH 3 .
  • the “leaving group” is preferably halogen.
  • Ph represents a phenyl group.
  • Examples of the salt include basic salts or acidic salts.
  • Examples of the basic salts include: alkali metal salts such as sodium salt, potassium salt, and lithium salt; alkaline earth metal salts such as calcium salt and magnesium salt; ammonium salt; aliphatic amine salts such as trimethylamine salt, triethylamine salt, dicyclohexylamine salt, ethanolamine salt, diethanolamine salt, triethanolamine salt, procaine salt, meglumine salt, diethanolamine salt, and ethylenediamine salt; aralkylamine salts such as N,N-dibenzylethylenediamine and benethamine salt;
  • heterocyclic aromatic amine salts such as pyridine salt, picoline salt, quinoline salt, and isoquinoline salt; quaternary ammonium salts such as tetramethylammonium salt, tetraethylammonium salt, benzyltrimethylammonium salt, benzyltriethylammonium salt, benzyltributylammonium salt, methyltrioctylammonium salt, and tetrabutylammonium salt; and basic amino acid salts such as arginine salt and lysine salt.
  • the acidic salts include: inorganic acid salts such as hydrochloride, sulfate, nitrate, phosphate, carbonate, bicarbonate, and perchlorate; organic acid salts such as acetate, propionate, lactate, maleate, fumarate, tartrate, malate, citrate, and ascorbate; sulfonates such as methanesulfonate, isethionate, benzenesulfonate, and p-toluenesulfonate; and acidic amino acids such as aspartate and glutamate.
  • inorganic acid salts such as hydrochloride, sulfate, nitrate, phosphate, carbonate, bicarbonate, and perchlorate
  • organic acid salts such as acetate, propionate, lactate, maleate, fumarate, tartrate, malate, citrate, and ascorbate
  • sulfonates such as methanesulfonate, iseth
  • the salt derived from the carboxyl or hydroxyl group is preferably a basic salt, more preferably an alkali metal salt.
  • Particularly preferred examples of the salt include sodium salt, lithium salt, and potassium salt.
  • the most preferred example of the salt includes sodium salt.
  • the salt derived from the amine site is preferably an acidic salt, more preferably an inorganic acid salt.
  • preferable salts include hydrochloride and sulfate.
  • This step is the step of reacting compound (X1) with compound (V1) to obtain a solution containing compound (X2), as shown below in the reaction formula.
  • solution means compound (X2) in a dissolved state and also encompasses compound (X2) in a suspension or slurry form in which the compound is dispersed without being completely dissolved. This holds true for the description below, and the “solution” according to the present specification encompasses suspension and slurry forms.
  • the compound (X1) may be a commercially available reagent or can be obtained by a method known in the art.
  • nucleophilic substitution reaction may be performed, if desired in the presence of a base, in a solvent supplemented with an alcohol reagent such as a lower alcohol optionally substituted by substituent E, a carbocyclyl lower alkyl alcohol optionally substituted by substituent E, a heterocyclyl lower alkyl alcohol optionally substituted by substituent E, or (R 1e ) 3 Si—OH to obtain compound (X1) wherein R 1d is lower alkyloxy optionally substituted by substituent E, carbocyclyl lower alkyloxy optionally substituted by substituent E, heterocyclyl lower alkyloxy optionally substituted by substituent E, or —OSi(R 1e ) 3 .
  • an alcohol reagent such as a lower alcohol optionally substituted by substituent E, a carbocyclyl lower alkyl alcohol optionally substituted by substituent E, a heterocyclyl lower alkyl alcohol optionally substituted by substituent E, or (R 1e ) 3 Si—OH to obtain
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by R 1d include methoxy, ethoxy, isopropoxy, trichloromethoxy, and trifluoromethoxy. Methoxy is preferred.
  • Examples of the “carbocyclyl lower alkyloxy optionally substituted by substituent E” represented by R 1d include benzyloxy, phenethyloxy, 2,4-difluorobenzyloxy, and 4-methoxybenzyloxy. Benzyloxy is preferred.
  • heterocyclyl lower alkyloxy optionally substituted by substituent E examples include pyridylmethyloxy.
  • R 1d in preferred embodiments is hydrogen, chloro, bromo, methoxy, or benzyloxy.
  • R 1d is —OSi(R 1e ) 3
  • R 1e in preferred embodiments is methyl, ethyl, n-propyl, isopropyl, tert-butyl, or the like.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 2d include methyl, ethyl, n-propyl, isopropyl, and tert-butyl.
  • Examples of the “carbocyclyl lower alkyl optionally substituted by substituent E” represented by R 2d include benzyl and 4-methoxybenzyl.
  • heterocyclyl lower alkyl optionally substituted by substituent E examples include pyridylmethyl.
  • R 2d in preferred embodiments is methyl, ethyl, n-propyl, isopropyl, tert-butyl, benzyl, 4-methoxybenzyl, or the like.
  • the reaction solvent used in the nucleophilic substitution reaction for obtaining the compound (X1) is preferably an aprotic solvent.
  • examples thereof include acetonitrile, tetrahydrofuran, dioxane, diethyl ether, dichloromethane, chloroform, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, and mixed solvents thereof.
  • the base can be any base capable of deprotonating the alcohol reagent.
  • Examples thereof include n-butyllithium, tert-butyllithium, sodium tert-butoxide, potassium-tert-butoxide, sodium tert-pentoxide, sodium methoxide, sodium ethoxide, sodium hydride, lithium diisopropylamide, and lithium bis(trimethylsilyl)amide.
  • the amount of the base is approximately 1.0 to 3.0 molar equivalents with respect to compound (X1) wherein R 1d is halogen.
  • the amount of the alcohol reagent is approximately 0.5 to 1.5 molar equivalents with respect to compound (X1) wherein R 1d is halogen.
  • the reaction temperature is usually 0° C. to reflux temperature, preferably room temperature to 50° C.
  • the reaction time is usually 10 minutes to 50 hours, preferably 1 to 4 hours.
  • the compound (V1) can be obtained as a commercially available reagent or by a method known in the art.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by P d include methyl, ethyl, and trifluoromethyl. P d in preferred embodiments is methyl.
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by R 3d include methoxy and ethoxy.
  • R 3d is —N(R 3e ) 2
  • examples of the “lower alkyl optionally substituted by substituent E” represented by R 3 ′ include methyl, ethyl, and trifluoromethyl.
  • R 3d in preferred embodiments is —N(CH 3 ) 2 , —OCH 3 , or pyrrolidinyl.
  • solvent of the reaction examples include acetonitrile, tetrahydrofuran, dioxane, diethyl ether, dichloromethane, chloroform, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, and mixed solvents thereof.
  • the amount of the compound (V1) used is approximately 1.0 to 3.0 molar equivalents with respect to compound (X1), or the compound (V1) may be used as a solvent.
  • the reaction temperature is usually 0° C. to reflux temperature, preferably room temperature.
  • the reaction time is usually 30 minutes to 50 hours, preferably 2 to 8 hours.
  • the compound (X2) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • Compound (X2) may be obtained through the following reaction:
  • R 5d is halogen, lower alkyloxy optionally substituted by substituent E, or —O—SO 2 —R 5e ′; and each of the other symbols is as defined above).
  • the compound (Z1) may be a commercially available reagent or can be obtained by a method known in the art.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 2d include methyl, ethyl, n-propyl, isopropyl, and tert-butyl.
  • Examples of the “carbocyclyl lower alkyl optionally substituted by substituent E” represented by R 2d include benzyl and 4-methoxybenzyl.
  • heterocyclyl lower alkyl optionally substituted by substituent E examples include pyridylmethyl.
  • R 2d in preferred embodiments is methyl, ethyl, n-propyl, isopropyl, tert-butyl, benzyl, 4-methoxybenzyl, or the like.
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by le d include methoxy and ethoxy.
  • R 3d is —N(R 3e ) 2
  • examples of the “lower alkyl optionally substituted by substituent E” represented by R 3e include methyl, ethyl, and trifluoromethyl.
  • R 3d in preferred embodiments is —N(CH 3 ) 2 , —OCH 3 , or pyrrolidinyl.
  • the compound (Z2) may be a commercially available reagent or can be obtained by a method known in the art.
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by R 1d include methoxy, ethoxy, isopropoxy, trichloromethoxy, and trifluoromethoxy. Methoxy is preferred.
  • Examples of the “carbocyclyl lower alkyloxy optionally substituted by substituent E” represented by R 1d include benzyloxy, phenethyloxy, 2,4-trifluorobenzyloxy, and 4-methoxybenzyloxy. Benzyloxy is preferred.
  • heterocyclyl lower alkyloxy optionally substituted by substituent E examples include pyridylmethyloxy.
  • R 1d in preferred embodiments is hydrogen, chloro, bromo, methoxy, or benzyloxy.
  • R 5d examples include chloro, bromo, methoxy, ethoxy, methanesulfonyloxy, trifluoromethanesulfonyloxy, and p-toluenesulfonyloxy.
  • solvent of the reaction examples include acetonitrile, tetrahydrofuran, dioxane, diethyl ether, dichloromethane, chloroform, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, and mixed solvents thereof.
  • the amount of the compound (Z2) used is approximately 1.0 to 3.0 molar equivalents with respect to compound (Z1).
  • the reaction temperature is usually ⁇ 10° C. to reflux temperature, preferably room temperature.
  • the reaction time is usually 10 minutes to 10 hours, preferably 1 to 4 hours.
  • Tertiary amine is added, if necessary.
  • examples of the tertiary amine include pyridine, triethylamine, dimethylaminopyridine, and N-methylmorpholine.
  • the compound (X2) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • This step is the step of reacting compound (X2) with compound (V2), if desired in the presence of a base, to obtain a solution containing compound (X3) or a salt thereof, as shown below in the reaction formula:
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by R 1d include methoxy, ethoxy, isopropoxy, trichloromethoxy, and trifluoromethoxy. Methoxy is preferred.
  • Examples of the “carbocyclyl lower alkyloxy optionally substituted by substituent E” represented by R 1d include benzyloxy, phenethyloxy, 2,4-trifluorobenzyloxy, and 4-methoxybenzyloxy. Benzyloxy is preferred.
  • heterocyclyl lower alkyloxy optionally substituted by substituent E examples include pyridylmethyloxy.
  • R 1d in Preferred embodiments is hydrogen, chloro, bromo, methoxy, or benzyloxy.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 2d include methyl, ethyl, n-propyl, isopropyl, and tert-butyl.
  • Examples of the “carbocyclyl lower alkyl optionally substituted by substituent E” represented by R 2d include benzyl and 4-methoxybenzyl.
  • heterocyclyl lower alkyl optionally substituted by substituent E examples include pyridylmethyl.
  • R 2d in preferred embodiments is methyl, ethyl, n-propyl, isopropyl, tert-butyl, benzyl, 4-methoxybenzyl, or the like.
  • Examples of the “lower alkyloxy optionally substituted by substituent E” represented by R 3d include methoxy and ethoxy.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 3e include methyl, ethyl, and trifluoromethyl.
  • R 3d in preferred embodiments is —N(CH 3 ) 2 , —OCH 3 , or pyrrolidinyl.
  • the compound (V2) can be obtained as a commercially available reagent or by a method known in the art.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 4d include methyl, ethyl, n-propyl, isopropyl, and tert-butyl.
  • Examples of the “carbocyclyl lower alkyl optionally substituted by substituent E” represented by R 4d include benzyl and 4-methoxybenzyl.
  • heterocyclyl lower alkyl optionally substituted by substituent E examples include pyridylmethyl.
  • R 4d examples include methyl, ethyl, n-propyl, isopropyl, tert-butyl, benzyl, and 4-methoxybenzyl. Particularly, methyl or ethyl is preferred.
  • R 5d examples include chloro, bromo, methoxy, ethoxy, acetoxy, methanesulfonyloxy, trifluoromethanesulfonyloxy, and p-toluenesulfonyloxy. Particularly, chloro, methoxy, or ethoxy is preferred.
  • reaction solvent examples include acetonitrile, tetrahydrofuran, dioxane, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, N-methylmorpholine, N-methylpyrrolidinone, and mixed solvents thereof.
  • Examples of the base include n-butyllithium, tert-butyllithium, sodium tert-butoxide, potassium-tert-butoxide, sodium tert-pentoxide, sodium methoxide, sodium ethoxide, sodium hydride, lithium diisopropylamide, and lithium bis(trimethylsilyl)amide.
  • the amount of the base used is approximately 1.0 to 5.0 molar equivalents with respect to compound (X2).
  • the amount of the compound (V2) used is approximately 1.5 to 5.0 molar equivalents with respect to compound (X2), or the compound (V2) may be used as a solvent.
  • the reaction temperature is usually ⁇ 80° C. to reflux temperature, preferably ⁇ 20° C. to 50° C.
  • the reaction time is usually 30 minutes to 50 hours, preferably 2 to 12 hours.
  • the compound (X3) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X3) is isolated as crystals free from impurities by crystallization.
  • This step is the step of reacting compound (X2) with compound (V2) and compound (V2′), if desired in the presence of a base, to obtain compound (X4′) or a salt thereof as shown below in the reaction formula:
  • R 1d , R 2d , R 3d , R 4d and R 5d in the formulae (X2) and (V2) are the same as above.
  • reaction solvent examples include acetonitrile, tetrahydrofuran, dioxane, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, N-methylmorpholine, N-methylpyrrolidinone, and mixed solvents thereof.
  • Examples of the base include n-butyllithium, tert-butyllithium, sodium tert-butoxide, potassium-tert-butoxide, sodium tert-pentoxide, sodium methoxide, sodium ethoxide, sodium hydride, lithium diisopropylamide, and lithium bis(trimethylsilyl)amide.
  • the amount of the base used is approximately 1.0 to 5.0 molar equivalents with respect to compound (X2).
  • the amount of the compound (V2) used is approximately 1.0 to 3.0 molar equivalents with respect to compound (X2), or the compound (V2) may be used as a solvent.
  • the reaction temperature is usually ⁇ 80° C. to reflux temperature, preferably ⁇ 20° C. to 30° C.
  • the reaction time is usually 10 minutes to 10 hours, preferably 30 minutes to 4 hours.
  • Examples of the compound (V2′) include ammonium acetate, ammonium chloride, ammonium bromide, ammonium sulfate, ammonium bisulfate, ammonium formate, ammonium nitrate, ammonium hydroxide, ammonium phosphate, NH 4 + BF 4 ⁇ , NH 4 PF 6 ⁇ , NH 4 +Ph-SO 3 ⁇ , NH 4 + CH 3 -Ph-SO 3 ⁇ , and NH 4 + CH 3 —SO 3 ⁇ .
  • the compound (V2′) is preferably ammonium acetate, ammonium chloride, ammonium sulfate, ammonium bisulfate, or ammonium formate. (In this context, Ph represents a phenyl group.)
  • the amount of the compound (V2′) used is approximately 1.0 to 3.0 molar equivalents with respect to compound (X2).
  • the reaction temperature is usually 0° C. to reflux temperature, preferably 20° C. to 80° C.
  • the reaction time is usually 10 minutes to 10 hours, preferably 30 minutes to 4 hours.
  • the compound (X4′) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X4′) is isolated as crystals free from impurities by crystallization.
  • This step is the step of reacting compound (X3) or a salt thereof with compound (V3) or a salt thereof to obtain cot/mound (X41 or a salt thereof as shown below in the reaction formula:
  • the compound (V3) can be obtained as a commercially available reagent or by a method known in the art.
  • Examples of the “lower alkyl optionally substituted by substituent E” represented by R 6d include HC( ⁇ O)—CH 2 —, CH(—OH) 2 —CH 2 —, CH 3 O—CH(—OH)—CH 2 —, dimethoxyethyl, diethoxyethyl, HO—CH 2 —CH(—OH)—CH 2 —,
  • Examples of the “lower alkenyl optionally substituted by substituent E” represented by R 6d include CH 2 ⁇ CH—CH 2 —.
  • reaction solvent examples include acetonitrile, tetrahydrofuran, dioxane, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, N-methylmorpholine, N-methylpyrrolidinone, methanol, ethanol, isopropanol, and mixed solvents thereof.
  • the amount of the compound (V3) used is approximately 1.0 to 2.0 molar equivalents with respect to compound (X3).
  • the reaction temperature is usually 0° C. to reflux temperature, preferably 20° C. to 70° C.
  • the reaction time is usually 30 minutes to 50 hours, preferably 2 to 12 hours.
  • R 6d in the formed compound (X4) is not an aldehyde group or a group having an equivalent thereof, such as HC( ⁇ O)—CH 2 —, CH 3 O—CH(—OH)—CH 2 —, or CH(—OH) 2 —CH 2 —
  • this moiety can be converted to HC( ⁇ O)—CH 2 —, CH 3 O—CH(—OH)—CH 2 —, or CH(—OH) 2 —CH 2 —, which is an aldehyde group or a group having an equivalent thereof, by deprotection methods for protective groups in aldehyde groups described in Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons) or a method known in the art as described in International Publication No. WO 2006/116764 or 2006/088173.
  • R 6d in compound (X4) is, for example, dimethoxyethyl
  • this moiety can be converted to HC( ⁇ O)—CH 2 — by the addition of an acid to the solution containing compound (X4).
  • the acid is not particularly limited and is exemplified by hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, p-toluenesulfonic acid, methanesulfonic acid, formic acid, acetic acid, trifluoroacetic acid, maleic acid, and oxalic acid.
  • the amount of the acid used is 2.0 to 10.0 molar equivalents with respect to compound (X4).
  • Acetic acid or formic acid may be used as a solvent and may be used as a mixture with any of the acids described above.
  • the reaction temperature is usually approximately 0° C. to 80° C., preferably 10° C. to 40° C.
  • the reaction time is usually 30 minutes to 50 hours, preferably 2 to 12 hours.
  • a compound with a deprotected amino group can also be obtained by deprotection methods for protective groups in amino groups described in Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons) or a method known in the art. The order of deprotection reactions can be changed appropriately.
  • R 6d is an amino protective group
  • the amino protective group in compound (X4) can be subjected to deprotection reaction, followed by reaction with compound (V3′) in the subsequent step, as in Step C′ shown below, to obtain the compound (X4) of interest.
  • the compound (X4) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X4) is isolated as crystals free from impurities by crystallization.
  • This step is the step of reacting compound (X4′) or a salt thereof with compound (V3′), if desired in the presence of a base, to obtain compound (X4) or a salt thereof, as shown below in the reaction formula:
  • R 1d , R 2d , R 4d , and R 6d in the formulae (X4′) and (V3′) are the same as those described above in Step B′ and Step C.
  • Examples of the “leaving group” represented by L d include halogen, —O—SO 2 —CH 3 , —O—SO 2 —CF 3 , —O—SO 2 -Ph, and —O—SO 2 -Ph-CH 3 .
  • Halogen is preferred. (In this context, Ph represents a phenyl group.)
  • R 6d in the formed compound (X4) does not have an aldehyde group or an equivalent thereof, such as HC( ⁇ O)—CH 2 —, CH 3 O—CH(—OH)—CH 2 —, or CH(—OH) 2 —CH 2 —
  • the method of converting this moiety to the aldehyde group or the equivalent thereof is also the same as above.
  • reaction solvent examples include acetonitrile, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, N-methylmorpholine, N-methylpyrrolidinone, and mixed solvents thereof.
  • Examples of the base include potassium carbonate, cesium carbonate, sodium hydride, n-butyllithium, tert-butyllithium, sodium tert-butoxide, potassium-tert-butoxide, sodium tert-pentoxide, sodium methoxide, triethylamine, 4-dimethylaminopyridine, diisopropylethylamine, and DBU (1,8-diazabicyclo[5.4.0]undec-7-ene).
  • the amount of the base used is approximately 1.0 to 5.0 molar equivalents with respect to compound (X4′).
  • the amount of the compound (V3′) used is approximately 1.0 to 4.0 molar equivalents with respect to compound (X4′), or the compound (V3′) may be used as a solvent.
  • the reaction temperature is usually 0° C. to reflux temperature, preferably 20° C. to 80° C.
  • the reaction time is usually 30 minutes to 24 hours, preferably 1 to 8 hours.
  • the compound (X4) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X4) is isolated as crystals free from impurities by crystallization.
  • This step is the step of reacting compound (X4) or a salt thereof with compound (V5) or compound (V5′), if desired in the presence of an acid, to obtain compound (X5) or compound (X5′), or a salt thereof, as shown below in the reaction formula:
  • R 1d , R 2d and R 4d are as defined above; R 6d is an aldehyde group or an equivalent thereof, such as HC( ⁇ O)—CH 2 —, CH 3 O—CH(—OH)—CH 2 —, or CH(—OH) 2 —CH 2 —; and when R 6d is not the aldehyde or the equivalent thereof, the method described above in Step C is performed).
  • R 1d , R 2d , and R 4d in the formulae (X4), (X5), and (X5′) are the same as above.
  • the compound (V5) and the compound (V5′) are commercially available reagents.
  • reaction solvent examples include acetonitrile, tetrahydrofuran, dioxane, toluene, xylene, ethyl acetate, N,N-dimethylformamide, N,N-dimethylacetamide, dimethylimidazolidinone, N-methylmorpholine, N-methylpyrrolidinone, and mixed solvents thereof.
  • Examples of the acid include acetic acid, trifluoroacetic acid, formic acid, and methanesulfonic acid.
  • the amount of the acid used is 0.5 to 3.0 molar equivalents with respect to compound (X4).
  • the amount of the compound (V5) or the compound (V5′) used is approximately 1.0 to 2.0 molar equivalents with respect to compound (X4), or the compound (V5) or the compound (V5′) may be used as a solvent.
  • an alcohol reagent may be added, if desired, to thereby improve the reaction rate.
  • the alcohol reagent is preferably methanol, ethanol, or isopropanol, particularly preferably methanol.
  • the reaction temperature is usually 20° C. to reflux temperature, preferably 60° C. to 80° C.
  • the reaction time is usually 30 minutes to 24 hours, preferably 1 to 8 hours.
  • the compound (X5) or the compound (X5′) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X5) or the compound (X5′) is isolated as crystals free from impurities by crystallization.
  • This step is the step of reacting compound (X5) or compound (X5′), or a salt thereof with compound (V6) or a salt thereof to obtain compound (X6) or compound (X6′), as shown below in the reaction formula:
  • R 1d and R 2d are as defined above;
  • R X is carbocyclyl optionally substituted by substituent E, heterocyclyl optionally substituted by substituent E, carbocyclyl lower alkyl optionally substituted by substituent E, or heterocyclyl lower alkyl optionally substituted by substituent E).
  • Examples of the “carbocyclyl optionally substituted by substituent E” represented by R X include phenyl, 2,4-difluorophenyl, and cyclohexyl.
  • heterocyclyl optionally substituted by substituent E represented by R X
  • examples of the “heterocyclyl optionally substituted by substituent E” represented by R X include pyridyl, morpholinyl, and isoxazolyl.
  • Examples of the “carbocyclyl lower alkyl optionally substituted by substituent E” represented by R X include benzyl, 4-methoxybenzyl, and 2,4-difluorobenzyl.
  • heterocyclyl lower alkyl optionally substituted by substituent E examples include pyridylmethyl and isoxazolylmethyl.
  • substituent E for the “carbocyclyl optionally substituted by substituent E”, “heterocyclyl optionally substituted by substituent E”, “carbocyclyl lower alkyl optionally substituted by substituent E”, and “heterocyclyl lower alkyl optionally substituted by substituent E” represented by R X include halogen, cyano, hydroxy, carboxy, formyl, amino, oxo, nitro, lower alkyl, halogeno lower alkyl, lower alkyloxy, halogeno lower alkyloxy, lower alkyloxy lower alkyl, lower alkyloxy lower alkyloxy, lower alkylcarbonyl, lower alkyloxycarbonyl, lower alkyloxycarbonyl, lower alkyloxycarbonylamino, lower alkylamino, lower alkylcarbonylamino, lower alkylaminocarbonyl, lower alkylsulfonyl, and lower alkylsulfonylamino.
  • More preferred examples thereof include halogen, cyano, hydroxy, carboxy, formyl, amino, lower alkyl, halogeno lower alkyl, and lower alkyloxy. Further preferred examples thereof include halogen, lower alkyl, and lower alkyloxy. Halogen is most preferred.
  • R X in preferred embodiments is “carbocyclyl lower alkyl optionally substituted by substituent E” or “heterocyclyl lower alkyl optionally substituted by substituent E”.
  • R X in more preferred embodiments is “carbocyclyl lower alkyl optionally substituted by substituent E”.
  • R X in further preferred embodiments is “carbocyclyl lower alkyl optionally substituted by halogen”.
  • R X in the most preferred embodiment is 2,4-difluorobenzyl.
  • R 1d is hydrogen
  • this moiety can be converted appropriately to halogen using a halogenating agent such as N-bromosuccinimide, N-chlorosuccinimide, or sulfuryl chloride.
  • R 1d can be selected appropriately according to the reactivity of the reaction substrate. The order of these reactions can be changed appropriately.
  • compound (X6) or compound (X6′) can be induced through general dehydration-condensation reaction (e.g., a method using a condensation agent, an acid chloride formation method, or an acid anhydride formation method) of the carboxyl group and compound (V6).
  • general dehydration-condensation reaction e.g., a method using a condensation agent, an acid chloride formation method, or an acid anhydride formation method
  • amide compound (X6) or compound (X6′) can be obtained through reaction at 0° C. to 60° C., preferably 10° C.
  • a dehydration-condensation agent such as dicyclohexylcarbodiimide, carbonyldiimidazole, dicyclohexylcarbodiimide-N-hydroxybenzotriazole, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, 2-(7-aza-1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate, or WSC.
  • a dehydration-condensation agent such as dicyclohexylcarbodiimide, carbonyldiimidazole, dicyclohexylcarbodiimide-N-hydroxybenzotriazole, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, 2-(7-aza-1H-benzotriazol-1-yl)-1,1,3,3-tetramethylur
  • R 2d is not hydrogen
  • this moiety is converted to a carboxyl group through general deprotection reaction of the carboxyl protective group.
  • Compound (X6) or compound (X6′) can be induced through the same dehydration-condensation reaction as above of the formed carboxyl group and compound (V6).
  • the carboxyl protective group is exemplified by carboxyl protective groups described in, for example, Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons). Preferred examples thereof include methyl, ethyl, tert-butyl, methoxymethyl, allyl, benzyl, and p-methoxybenzyl groups.
  • compound (X6) or compound (X6′) can also be induced through aminolysis reaction using compound (V6).
  • the compound (X6) or the compound (X6′) may be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.) or can also be used in the next reaction without being isolated.
  • the compound (X6) or the compound (X6′) is isolated as crystals free from impurities by crystallization.
  • R 6d is an aldehyde group or an equivalent thereof such as HC( ⁇ O)—CH 2 —, CH 3 O—CH(—OH)—CH 2 —, or CH(—OH) 2 —CH 2 —; and when R 6d is not the aldehyde or the equivalent thereof, the method described above in Step C is performed).
  • This step is the step of reacting compound (X5) or compound (X4), or a salt thereof with compound (V6) or a salt thereof to obtain compound (X4′′).
  • R 1d , R 2d , R 4d , and R X are the same as above.
  • compound (X4′′) can be induced through general dehydration-condensation reaction (e.g., a method using a condensation agent, an acid chloride formation method, or an acid anhydride formation method) of the carboxyl group and compound (V6).
  • general dehydration-condensation reaction e.g., a method using a condensation agent, an acid chloride formation method, or an acid anhydride formation method
  • amide compound (X6) can be obtained through reaction at 0° C. to 60° C., preferably 10° C.
  • a dehydration-condensation agent such as dicyclohexylcarbodiimide, carbonyldiimidazole, dicyclohexylcarbodiimide-N-hydroxybenzotriazole, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, 2-(7-aza-1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate, or WSC.
  • a dehydration-condensation agent such as dicyclohexylcarbodiimide, carbonyldiimidazole, dicyclohexylcarbodiimide-N-hydroxybenzotriazole, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, 2-(7-aza-1H-benzotriazol-1-yl)-1,1,3,3-tetramethylur
  • R 2d is not hydrogen
  • this moiety is converted to a carboxyl group through general deprotection reaction of the carboxyl protective group.
  • Compound (X4′′) can be induced through the same dehydration-condensation reaction as above of the formed carboxyl group and compound (V6).
  • the carboxyl protective group is exemplified by carboxyl protective groups described in, for example, Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons). Preferred examples thereof include methyl, ethyl, tert-butyl, methoxymethyl, allyl, benzyl, and p-methoxybenzyl groups. A methyl group is particularly preferred.
  • compound (X4′′) can also be induced through aminolysis reaction of compound (V6).
  • This step is the step of reacting the compound (X4′) obtained in Step E′ with compound (V5) or compound (V5′), if desired in the presence of an acid, to obtain compound (X6) or compound (X6′), or a salt thereof.
  • This step is the step of obtaining compound (Y1) or compound (Y2), or a salt thereof from compound (X6) or compound (X6′), as shown below in the reaction formula:
  • R S examples and preferred embodiments of R S are as defined above.
  • R 1d is lower alkyloxy optionally substituted by substituent E, carbocyclyl lower alkyloxy optionally substituted by substituent E, heterocyclyl lower alkyloxy optionally substituted by substituent E, or —OSi(R 1e ) 3
  • this moiety can be converted to a hydroxy group through hydroxy deprotection reaction known in the art described in, for example, Protective Groups in Organic Synthesis, Theodora W Greene (John Wiley & Sons).
  • R 1d when R 1d is methyloxy, this moiety can be converted to a hydroxy group using a reagent such as (CH 3 ) 3 —Si—I, BBr 3 , or BF 3 .Et 2 O.
  • a reagent such as (CH 3 ) 3 —Si—I, BBr 3 , or BF 3 .Et 2 O.
  • R 1d is benzyloxy
  • this moiety can be converted to a hydroxy group using Pd—C/H 2 gas, a Raney-Ni reagent, or the like.
  • R 1d is —OSi(CH 3 ) 3
  • this moiety can be converted to a hydroxy group using a tetramethylammonium fluoride reagent.
  • R 1d is halogen
  • this moiety can be converted to a hydroxy group by reaction with potassium trimethylsilanolate or lithium trimethylsilanolate and the subsequent addition of an aqueous solution of an inorganic acid.
  • Examples of other conditions for the conversion reaction of halogen to a hydroxy group also include use of sodium hydride/water (Bioorganic Medicinal Chemistry Letters, 17, 1713, 2007), potassium hydroxide/tris(dibenzylideneacetone)dipalladium (Pd 2 dba 3 )/di-tert-butylarylphosphine (Journal of the American Chemical Society, 128, 10694, 2006), potassium phosphate hydrate (K 3 PO 4 .H 2 O)/tris(dibenzylideneacetone)dipalladium (Pd 2 dba 3 )/tri-tert-butylphosphine (Tetrahedron Letters, 48, 473, 2007).
  • the halogen represented by R 1d in the starting material may be derivatized directly.
  • this approach requires a smaller number of reaction steps and may construct a more advantageous industrial production method, compared with the method involving alcohol protection and/or deprotection reactions.
  • R 1d When R 1d is hydrogen, this R 1d may be converted to halogen through reaction with a halogenating agent such as N-bromosuccinimide, N-chlorosuccinimide, or sulfuryl chloride, followed by reaction with potassium trimethylsilanolate or lithium trimethylsilanolate and the subsequent addition of an aqueous solution of an inorganic acid in the same way as above to induce a hydroxy group. Accordingly, R 1d can be selected appropriately from among these substituents according to the reactivity of the reaction substrate.
  • a halogenating agent such as N-bromosuccinimide, N-chlorosuccinimide, or sulfuryl chloride
  • the compound (Y1) or the compound (Y2) can be isolated by a general purification method (extraction, distillation, column chromatography, crystallization, etc.).
  • the compound (Y1) or the compound (Y2) can be converted to a salt by the desired method.
  • the salt is preferably a basic salt, more preferably an alkali metal salt such as sodium salt, potassium salt, or lithium. The most preferred example thereof includes sodium salt.
  • the salt of compound (Y1) or compound (Y2) can be deposited by dissolving the compound (Y1) or the compound (Y2) in an organic solvent or a mixed solution of an organic solvent and water and adding an aqueous alkali solution or an organic base to the solution, followed by stirring. This dissolution is performed by heating, if necessary. Also, the salt deposition is performed by cooling, if necessary.
  • ethanol methanol, isopropyl alcohol, acetone, acetonitrile, tetrahydrofuran, or dichloromethane may be used as the organic solvent.
  • the steps described above can be combined arbitrarily to obtain compound (Y1) or compound (Y2), or a salt thereof. Also, one or two or more chemical reactions well known by those skilled in the art may be combined appropriately before and/or after each step.
  • WSC N-ethyl-N′-(3-dimethylaminopropyl)carbodiimide
  • HATU O-(7-azabenzotriazol-1-yl)-N,N,N,N-tetramethyluronium hexafluorophosphate
  • DBU 1,8-diazabicyclo[5.4.0]-7-undecene
  • NBS N-bromosuccinimide
  • a THF (3 ml) solution of benzyl alcohol (1.00 g, 9.25 mmol) was added to a THF (4 ml) suspension of sodium tert-pentoxide (2.55 g, 23.2 mmol) at room temperature in a nitrogen atmosphere, and the mixture was stirred at 40° C. for 2 hours.
  • This reaction solution was cooled in an ice bath, and a THF (3 ml) solution of compound 1A (1.53 g, 10.2 mmol) was added dropwise thereto at 0-10° C.
  • the reaction solution was stirred at room temperature for 2 hours, and 2 N hydrochloric acid (15 ml) was then added thereto, followed by extraction two times with ethyl acetate.
  • a DMI (3 ml) solution of benzyl alcohol (0.66 g, 6.1 mmol) was added to a DMI (4 ml) suspension of sodium tert-pentoxide (1.67 g, 15.2 mmol) at room temperature in a nitrogen atmosphere, and the mixture was stirred at 40° C. for 2 hours.
  • This reaction solution was cooled in an ice bath, and a DMI (3 ml) solution of compound 2A (1.10 g, 6.68 mmol) was added dropwise thereto at 0-10° C. The reaction solution was stirred at 0-5° C.
  • N,N-dimethylformamide dimethyl acetal (4.9 ml, 36.5 mmol) was added dropwise to compound 3A (5.0 g, 30.4 mmol) under cooling at 0° C.
  • 100 ml of ethyl acetate was added to the reaction solution, and the organic layer was washed with a 0.5 N aqueous hydrochloric acid solution (50 ml).
  • the aqueous layer was separated, followed by extraction with ethyl acetate (50 ml).
  • the organic layers were combined, washed with a saturated aqueous solution of sodium bicarbonate and saturated saline in this order, and then dried over anhydrous sodium sulfate.
  • Lithium hexamethyldisilazide (1.0 M solution in toluene, 49 ml, 49.0 mmol) was diluted with tetrahydrofuran (44 ml).
  • the mixture was stirred at ⁇ 78° C. for 2 hours and then heated to 0° C.
  • N,N-dimethylformamide dimethyl acetal (12.2 ml, 92.2 mmol) was added dropwise to compound 4A (10.0 g, 76.8 mmol) under cooling at 0° C. After stirring at 0° C. for 1.5 hours and then at room temperature for 2.5 hours, 100 ml of ethyl acetate was added to the reaction solution, and the solvent was distilled off. The obtained residue was purified by silica gel column chromatography (n-hexane-ethyl acetate: 5:5 ⁇ 0:10 (v/v)) to obtain 12.45 g (yield: 88%) of compound 4B as an oil.
  • Lithium hexamethyldisilazide (1.0 M solution in toluene, 24 ml, 24.0 mmol) was diluted with tetrahydrofuran (20 ml).
  • a tetrahydrofuran (5 ml) solution of compound 4B (1.85 g, 10.0 mmol) was added dropwise thereto under cooling at ⁇ 78° C., and a tetrahydrofuran (5 ml) solution of ethyl oxalyl chloride (1.34 ml, 12.0 mmol) was then added dropwise thereto.
  • 2 N hydrochloric acid was added to the reaction solution, and the mixture was stirred at room temperature for 20 minutes.
  • N-bromosuccinimide (1.46 g, 8.18 mmol) was added to a N,N-dimethylformamide (10 ml) solution of compound 4D (2.68 g, 8.18 mmol), and the mixture was stirred at room temperature for 48 hours.
  • a saturated aqueous solution of sodium bicarbonate was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with water and saturated saline in this order and then dried over anhydrous sodium sulfate.
  • Potassium trimethylsilanolate (249 mg, 1.95 mmol) was added to a 1,2-dimethoxyethane (3 ml) solution of compound 4G (300 mg, 0.78 mmol), and the mixture was stirred at room temperature for 1 hour. Potassium trimethylsilanolate (249 mg, 1.95 mmol) was further added thereto, and the mixture was stirred at 60° C. for additional 1 hour. 1 N hydrochloric acid and saturated saline were added to the reaction solution, followed by extraction with chloroform. The chloroform layers were combined and dried over anhydrous sodium sulfate. The solvent was distilled off to obtain 100.3 mg (yield: 43%) of compound 3G as a yellow powder.
  • Lithium hexamethyldisilazide (1.0 M solution in toluene, 12 ml, 12.0 mmol) was diluted with tetrahydrofuran (11 ml).
  • a tetrahydrofuran (2 ml) solution of compound 6A (1.46 g, 5.0 mmol) was added dropwise thereto under cooling at ⁇ 78° C., and a tetrahydrofuran (2 ml) solution of ethyl oxalyl chloride (0.67 ml, 6.0 mmol) was then added dropwise thereto. After stirring at ⁇ 78° C.
  • Cesium carbonate (73.3 mg, 0.23 mmol) and bromoacetaldehyde dimethyl acetal (38.0 mg, 0.23 mmol) were added to a N,N-dimethylformamide (1 ml) solution of compound 6B (51.8 mg, 0.15 mmol), and the mixture was stirred overnight at room temperature.
  • Cesium carbonate (73.3 mg, 0.23 mmol) and bromoacetaldehyde dimethyl acetal (38.0 mg, 0.23 mmol) were further added thereto, and the mixture was stirred at 100° C. for additional 20 minutes. Water was added to the reaction solution, followed by extraction with ethyl acetate.
  • the acetal moiety of the compound 10B obtained in Example 10 is converted to an aldehyde group in the same way as in Step 4 of Example 3.
  • the resulting compound is reacted with (R)-3-amino-butan-1-ol or (S)-2-amino-propan-1-ol.
  • the benzyl group which is an alcohol protective group, can be subjected to deprotection reaction (using, for example, Pd—C/H 2 gas) to induce the compound (Y1) or (Y2) of interest.
  • Example 11 The compound 11B obtained in Example 11 can be used in the next reaction in the same way as in Example 6.
  • the compound 12B was dried under conditions of concentration under reduced pressure and left standing at 5° C. for approximately 2 months. In this case, this compound was still in an oil form and was not crystallized. As a result of various studies, however, the compound was successfully crystallized by repeating the addition of ethyl acetate and concentration and isolated as white crystals.
  • the powder X-ray diffractometry of the crystals obtained in each Example was performed under the following measurement conditions according to the powder X-ray diffractometry described in the general test methods of the Japanese Pharmacopoeia.
  • the crude product A-2 obtained in the preceding step was dissolved in ethanol (40 ml). To the solution, a 2 N aqueous sodium hydroxide solution (20 ml) was added at room temperature, and the mixture was stirred at the same temperature for 2 hours. The reaction solution was neutralized to pH 7 using a 2 N aqueous hydrochloric acid solution. The solvent was directly distilled off. The obtained crude product A-3 was subjected to azeotropy with toluene (100 ml) and used in the next step without being purified.
  • the production method according to the present invention can reduce the number of steps for producing compounds having HIV integrase inhibitory activity from, for example, conventionally required 16 to 11 steps to preferably 8 to 6 steps.
  • the production method of the present invention is applicable as an efficient industrial production method and as such, has industrial applicability.

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US15/709,716 US10125146B2 (en) 2010-08-05 2017-09-20 Crystalline methyl (4R,12aS)-7-(benzyloxy)-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylate

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US15/072,388 Active US9650394B2 (en) 2010-08-05 2016-03-17 Methods of producing substituted (3S,11aR)-6-hydroxy-3-methyl-5,7-dioxo-2,3,5,7,11,11a-Hexahydrooxazolo[3,2-a]pyrido[1,2-d]pyrazine-8-carboxamides
US15/471,133 Active US9802959B2 (en) 2010-08-05 2017-03-28 Method of producing (4R,12aS)-7,9-dihalo-4-methyl-3,4,12,12a-tetrahydro-2H-pyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazine-6,8-diones
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US15/072,388 Active US9650394B2 (en) 2010-08-05 2016-03-17 Methods of producing substituted (3S,11aR)-6-hydroxy-3-methyl-5,7-dioxo-2,3,5,7,11,11a-Hexahydrooxazolo[3,2-a]pyrido[1,2-d]pyrazine-8-carboxamides
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US15/709,728 Active US10125147B2 (en) 2010-08-05 2017-09-20 Crystalline methyl (4R,12aS)-7-(benzyloxy)-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxylate
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