Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
  • C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
  • C07D513/04—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
  • A61K31/54—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 sulfur as the ring hetero atoms, e.g. sulthiame
  • A61K31/542—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 sulfur as the ring hetero atoms, e.g. sulthiame 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
  • A61P25/00—Drugs for disorders of the nervous system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P25/00—Drugs for disorders of the nervous system
  • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
• • 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

Definitions

• the present invention relates to a fused aminodihydrothiazine derivative and pharmaceutical use thereof. More particularly, the present invention relates to a fused aminodihydrothiazine derivative which has an amyloid- ⁇ (hereinafter referred to as A ⁇ ) protein production inhibitory effect or a beta-site amyloid- ⁇ precursor protein cleavage enzyme 1 (hereinafter referred to as BACE1 or beta-secretase) inhibitory effect and is effective for treating a neurodegenerative disease caused by A ⁇ protein, in particular, Alzheimer-type dementia, Down's syndrome or the like, and to a pharmaceutical composition comprising the fused aminodihydrothiazine derivative as an active ingredient.
• a ⁇ amyloid- ⁇
• BACE1 or beta-secretase beta-site amyloid- ⁇ precursor protein cleavage enzyme 1
• Alzheimer's disease is a disease characterized by degeneration and loss of neurons as well as formation of senile plaques and neurofibrillary tangles.
• a symptom improving agent typified by an acetylcholinesterase inhibitor
• a fundamental remedy to inhibit progression of the disease has not yet been developed. It is necessary to develop a method for controlling the cause of the onset of pathology in order to create a fundamental remedy for Alzheimer-type dementia.
• a ⁇ -proteins as metabolites of amyloid precursor proteins (hereinafter referred to as APP) are highly involved in degeneration and loss of neurons and onset of symptoms of dementia (see Non-Patent Documents 3 and 4, for example).
• a ⁇ -proteins have, as main components, A ⁇ 40 consisting of 40 amino acids and A ⁇ 42 with two amino acids added at the C-terminal.
• the A ⁇ 40 and A ⁇ 42 are known to have high aggregability (see Non-Patent Document 5, for example) and to be main components of senile plaques (see Non-Patent Documents 5, 6 and 7, for example).
• a ⁇ 40 and A ⁇ 42 are increased by mutation in APP and presenilin genes which is observed in familial Alzheimer's disease (see Non-Patent Documents 8, 9 and 10, for example). Accordingly, a compound that reduces production of A ⁇ 40 and A ⁇ 42 is expected as a progression inhibitor or prophylactic agent for Alzheimer-type dementia.
• Patent Documents 1 to 15 describe an aminodihydrothiazine derivative and a compound having BACE1 inhibitory activity.
• An object of the present invention is to provide a fused aminodihydrothiazine compound which differs from an aminodihydrothiazine derivative and a compound having BACE1 inhibitory activity described in Patent Document 1 and which has an A ⁇ production inhibitory effect or a BACE1 inhibitory effect and is useful as a therapeutic agent for a neurodegenerative disease caused by A ⁇ and typified by Alzheimer-type dementia, and pharmaceutical use thereof.
• the present invention relates to:
• Ring A is a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 5- to 6-membered heteroaryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 9- to 10-membered benzo-fused heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• R L is a single bond, an oxygen atom, —NR L CO— (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), an —NR L CO-C 1-6 alkyl group (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), —NR L SO 2 — (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), a C 1-6 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 2-6 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-6 alkynylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Ring B is a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• X is a single bond or a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Y is a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-3 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Z is an oxygen atom, a sulfur atom, a sulfoxide, a sulfone or —NR M — (wherein R M is a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfon
• R 1 and R 2 are each independently a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , and
• R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, a halogen atom, a hydroxy group, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkoxy group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 3- to 10-membered carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , or
• R 4 and R 6 together may form a ring represented by the formula (II):
• Y, Z, R 5 and R 3 are the same as defined above and Q is an oxygen atom, a methylene group or an ethylene group
• Substituent Group ⁇ a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, a C 1-6 alkylthio group, a C 6-14 aryl group, a C 6-14 aryloxycarbonyl group, a C 6-14 arylcarbonyl group, a cyano group, a C 3-8 cycloalkoxy group, a C 3-8 cycloalkyl group, a C 3-8 cycloalkylthio group, a sulfonylamino group (wherein the sulfonylamino group may be substituted with 1 to 2 C 1-6 alkyl groups), a C 2-6 alkenyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a C 2-6 alkynyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a carbamoyl group which may be substituted with 1 to 2 C —
• Substituent Group ⁇ a halogen atom, a cyano group, a hydroxy group and a C 1-6 alkoxy group (wherein the alkoxy group may be substituted with a phenyl group which may be substituted with 1 to 3 substituents selected from a hydrogen atom, a halogen atom, a hydroxy group and a nitro group)];
• Ring A is a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 5- to 6-membered heteroaryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 9- to 10-membered benzo-fused heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• L is a single bond, an oxygen atom, —NR L CO— (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), —NR L SO 2 — (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), a C 1-6 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 2-6 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-6 alkynylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Ring B is a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• X is a single bond or a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Y is a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-3 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Z is an oxygen atom, a sulfur atom, a sulfoxide, a sulfone or —NR M — (wherein R M is a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfon
• R 1 and R 2 are each independently a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , and
• R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, a halogen atom, a hydroxy group, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkoxy group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 3- to 10-membered carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , or
• R 4 and R 6 together may form a ring represented by the formula (II):
• Y, Z, R 5 and R 3 are the same as defined above and Q is an oxygen atom, a methylene group or an ethylene group
• Substituent Group ⁇ a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, a C 1-6 alkylthio group, a C 6-14 aryl group, a C 6-14 aryloxycarbonyl group, a C 6-14 arylcarbonyl group, a cyano group, a C 3-8 cycloalkoxy group, a C 3-8 cycloalkyl group, a C 3-8 cycloalkylthio group, a sulfonylamino group (wherein the sulfonylamino group may be substituted with 1 to 2 C 1-6 alkyl groups), a C 2-6 alkenyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a C 2-6 alkynyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a carbamoyl group which may be substituted with 1 to 2 C —
• Substituent Group ⁇ a halogen atom, a cyano group, a hydroxy group and a C 1-6 alkoxy group];
• Ring A is a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 5- to 6-membered heteroaryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 9- to 10-membered benzo-fused heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• L is a single bond, an oxygen atom, —NR L CO— (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), —NR L SO 2 — (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), a C 1-6 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 2-6 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-6 alkynylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Ring B is a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• X is a single bond or a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Y is a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a C 2-3 alkenylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ,
• Z is an oxygen atom, a sulfur atom, a sulfoxide, a sulfone or —NR M — (wherein R M is a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfon
• R 1 and R 2 are each independently a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , and
• R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, a halogen atom, a hydroxy group, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkoxy group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 3- to 10-membered carbocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇
• Substituent Group ⁇ a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, a C 1-6 alkylthio group, a C 6-14 aryl group, a C 6-14 aryloxycarbonyl group, a C 6-14 arylcarbonyl group, a cyano group, a C 3-8 cycloalkoxy group, a C 3-8 cycloalkyl group, a C 3-8 cycloalkylthio group, a sulfonylamino group (wherein the sulfonylamino group may be substituted with 1 to 2 C 1-4 alkyl groups), a C 2-6 alkenyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a C 2-6 alkynyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a carbamoyl group which may be substituted with 1 to 2 C —
• Substituent Group ⁇ a halogen atom, a cyano group, a hydroxy group and a C 1-6 alkoxy group];
• the present invention can provide a compound represented by the general formula:
• Ring A is a C 6-14 aryl group or the like
• L is —NR L CO— or the like (wherein is a hydrogen atom or the like)
• Ring B is a C 6-14 aryl group or the like
• X is a C 1-3 alkylene group or the like
• Y is a C 1-3 alkylene group or the like
• Z is an oxygen atom or the like
• R 1 and R 2 are each independently a hydrogen atom or the like
• R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, a halogen atom or the like, or a pharmaceutically acceptable salt thereof, or a solvate thereof.
• the compound of the present invention has an A ⁇ production inhibitory effect or a BACE1 inhibitory effect and is useful as a therapeutic agent for a neurodegenerative disease caused by A ⁇ and typified by Alzheimer-type dementia.
• a structural formula of a compound may represent a certain isomer for convenience.
• the present invention includes all isomers and isomer mixtures such as geometric isomers which can be generated from the structure of a compound, optical isomers based on asymmetric carbon, stereoisomers and tautomers.
• the present invention is not limited to the description of a chemical formula for convenience and may include any one of the isomers or mixtures thereof.
• the compound of the present invention may have an asymmetric carbon atom in the molecule and exist as an optically active compound or racemate, and the present invention includes each of the optically active compound and the racemate without limitations.
• crystal polymorphs of the compound may be present, the compound is similarly not limited thereto and may be present as a single crystal form or a mixture of single crystal forms.
• the compound may be an anhydride or a hydrate. Any of these forms is included in the claims of the present specification.
• halogen atom herein refers to a fluorine atom, a chlorine atom, a bromine atom, an iodine atom or the like and is preferably a fluorine atom or a chlorine atom.
• C 1-6 alkyl group refers to an alkyl group having 1 to 6 carbon atoms.
• the group include linear or branched alkyl groups such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a t-butyl group, an n-pentyl group, an isopentyl group, a neopentyl group, an n-hexyl group, a 1-methylpropyl group, an 1,2-dimethylpropyl group, a 1-ethylpropyl group, a 1-methyl-2-ethylpropyl group, a 1-ethyl-2-methylpropyl group, a 1,1,2-trimethylpropyl group, a 1-methylbutyl group, a 2-methylbutyl group, a 1,1-dimethylbutyl group, a 2,2-dimethyl
• the “C 2-6 alkenyl group” refers to an alkenyl group having 2 to 6 carbon atoms.
• Preferable examples of the group include linear or branched alkenyl groups such as a vinyl group, an allyl group, a 1-propenyl group, an isopropenyl group, a 1-buten-1-yl group, a 1-buten-2-yl group, a 1-buten-3-yl group, a 2-buten-1-yl group and a 2-buten-2-yl group.
• C 2-6 alkynyl group refers to an alkynyl group having 2 to 6 carbon atoms.
• Preferable examples of the group include linear or branched alkynyl groups such as an ethynyl group, a 1-propynyl group, a 2-propynyl group, a butynyl group, a pentynyl group and a hexynyl group.
• the “C 1-6 alkoxy group” refers to an alkyl group having 1 to 6 carbon atoms in which one hydrogen atom is replaced by an oxygen atom.
• Examples of the group include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an isobutoxy group, a sec-butoxy group, a t-butoxy group, an n-pentoxy group, an isopentoxy group, a sec-pentoxy group, a t-pentoxy group, an n-hexoxy group, an isohexoxy group, a 1,2-dimethylpropoxy group, a 2-ethylpropoxy group, a 1-methyl-2-ethylpropoxy group, a 1-ethyl-2-methylpropoxy group, a 1,1,2-trimethylpropoxy group, a 1,1-dimethylbutoxy group, a 2,2-dimethylbutoxy group, a 2-ethylbutoxy group
• C 1-6 alkylthio group refers to an alkyl group having 1 to 6 carbon atoms in which one hydrogen atom is replaced by a sulfur atom.
• Examples of the group include a methylthio group, an ethylthio group, an n-propylthio group, an isopropylthio group, an n-butylthio group, an isobutylthio group, a t-butylthio group, an n-pentylthio group, an isopentylthio group, a neopentylthio group, an n-hexylthio group and a 1-methylpropylthio group.
• C 1-6 alkylsulfonyl group refers to an alkyl group having 1 to 6 carbon atoms in which one hydrogen atom is replaced by a sulfonyl group.
• the group include a methylsulfonyl group, an ethylsulfonyl group, an n-propylsulfonyl group, an isopropylsulfonyl group, an n-butylsulfonyl group, an isobutylsulfonyl group, a t-butylsulfonyl group, an n-pentylsulfonyl group, an isopentylsulfonyl group, a neopentylsulfonyl group, an n-hexylsulfonyl group and a 1-methylpropylsulfonyl group.
• C 1-6 alkylcarbonyl group refers to an alkyl group having 1 to 6 carbon atoms in which one hydrogen atom is replaced by a carbonyl group.
• Preferable examples of the group include an acetyl group, a propionyl group and a butyryl group.
• the “C 6-14 aryl group” refers to an aromatic hydrocarbon ring group having 6 to 14 carbon atoms. Examples of the group include a phenyl group, a naphthyl group and an anthryl group. A phenyl group is particularly preferable.
• C 7-12 aralkyl group refers to a group having 7 to 12 carbon atoms in which an aromatic ring such as a phenyl group or a naphthyl group is substituted with a C 1-6 alkyl group.
• the group include a benzyl group, a phenethyl group, a phenylpropyl group and a naphthylmethyl group.
• a benzyl group is particularly preferable.
• C 6-14 aryloxycarbonyl group refers to a group in which carbonyl is bonded to an aromatic ring phenol having 6 to 14 carbon atoms.
• Preferable examples of the group include a phenyloxycarbonyl group, a naphthyloxycarbonyl group and an anthryloxycarbonyl group.
• a phenyloxycarbonyl group is more preferable.
• C 6-14 arylcarbonyl group refers to a group in which a carbonyl group is bonded to an aromatic ring having 6 to 14 carbon atoms.
• Preferable examples of the group include a benzoyl group and a naphthoyl group. A benzoyl group is more preferable.
• C 6-14 arylsulfonyl group refers to a group in which a sulfonyl group is bonded to an aromatic ring having 6 to 14 carbon atoms.
• Preferable examples of the group include a benzenesulfonyl group and a naphthylsulfonyl group. A benzenesulfonyl group is more preferable.
• the “C 3-8 cycloalkyl group” refers to a cyclic alkyl group having 3 to 8 carbon atoms.
• Preferable examples of the group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and a cyclooctyl group.
• the “C 3-8 cycloalkoxy group” refers to a cyclic alkyl group having 3 to 8 carbon atoms in which one hydrogen atom is replaced by an oxygen atom.
• Examples of the group include a cyclopropoxy group, a cyclobutoxy group, a cyclopentoxy group, a cyclohexoxy group, a cycloheptyloxy group and a cyclooctyloxy group.
• C 3-8 cycloalkylthio group refers to a cyclic alkyl group having 3 to 8 carbon atoms in which one hydrogen atom is replaced by a sulfur atom.
• Examples of the group include a cyclopropylthio group, a cyclobutylthio group, a cyclopentylthio group, a cyclohexylthio group, a cycloheptylthio group and a cyclooctylthio group.
• the “5- to 10-membered heterocyclic group” refers to a heteroatom-containing cyclic group having 5 to 10 members in total.
• the group include a piperidinyl group, a pyrrolidinyl group, an azepinyl group, an azocanyl group, a piperazinyl group, a 1,4-diazepanyl group, a morpholinyl group, a thiomorpholinyl group, a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a pyridinyl group, a pyridazinyl group, a pyrimidinyl group, a pyrazinyl group, a triazolyl group, a triazinyl group, a tetrazolyl group, an isoxazolyl group, an oxazolyl group, an oxadiazolyl group, an isothiazolyl group
• the “5- to 6-membered heteroaryl group” refers to the “5- to 10-membered heterocyclic group” which is a heteroatom-containing aromatic cyclic group having 5 to 6 members in total.
• the group include a pyrrolyl group, an imidazolyl group, a pyrazolyl group, a pyridinyl group, a pyridazinyl group, a pyrimidinyl group, a pyrazinyl group, a triazolyl group, a triazinyl group, a tetrazolyl group, an isoxazolyl group, an oxazolyl group, an oxadiazolyl group, an isothiazolyl group, a thiazolyl group, a thiadiazolyl group, a furyl group and a thienyl group.
• the “9- to 10-membered benzo-fused heterocyclic group” refers to the “5- to 10-membered heterocyclic group” which is a heteroatom-containing cyclic group having 9 to 10 members in total fused with a benzene ring.
• the group include an indolinyl group, an isoindolinyl group, a chromanyl group, an isochromanyl group, a 1,3-dioxaindanyl group and a 1,4-dioxatetralinyl group.
• the “3- to 10-membered carbocyclic group” refers to a carbocyclic group having 3 to 10 members in total.
• the group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a spiro[3.4]octanyl group, a decanyl group, an indanyl group, a 1-acenaphthenyl group, a cyclopentacyclooctenyl group, a benzocyclooctenyl group, an indenyl group, a tetrahydronaphthyl group, a 6,7,8,9-tetrahydro-5H-benzocycloheptenyl group and a 1,4-dihydronaphthalenyl group.
• the “C 1-6 alkylene group” refers to a divalent group derived by excluding any one hydrogen atom from the “C 1-6 alkyl group” as defined above. Examples of the group include a methylene group, a 1,2-ethylene group, a 1,1-ethylene group, a 1,3-propylene group, a tetramethylene group, a pentamethylene group and a hexamethylene group.
• the “C 2-6 alkenylene group” refers to a divalent group derived by excluding any one hydrogen atom from the “C 2-6 alkenyl group” as defined above.
• Examples of the group include a 1,2-vinylene group (ethenylene group), a propenylene group, a butenylene group, a pentenylene group and a hexenylene group.
• the “C 2-6 alkynylene group” refers to a divalent group derived by excluding any one hydrogen atom from the “C 2-6 alkynyl group” as defined above.
• Examples of the group include an ethynylene group, a propynylene group, a butynylene group, a pentynylene group and a hexynylene group.
• C 1-3 alkylene group examples include a methylene group, an ethylene group and a propylene group.
• Examples of the “C 2-3 alkynylene group” include an ethynylene group and a propynylene group.
• Examples of the sulfonylamino group which may be substituted with a C 1-6 alkyl group in the “sulfonylamino group (wherein the sulfonylamino group may be substituted with a C 1-6 alkyl group)” include a methylsulfonylmethylamino group, an ethylsulfonylmethylamino group and an ethylsulfonylethylamino group.
• “Substituent Group ⁇ ” refers to a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, a C 1-6 alkylthio group, a C 6-14 aryl group, a C 6-14 aryloxycarbonyl group, a C 6-14 arylcarbonyl group, a cyano group, a C 3-8 cycloalkoxy group, a C 3-8 cycloalkyl group, a C 3-8 cycloalkylthio group, a sulfonylamino group (wherein the sulfonylamino group may be substituted with 1 to 2 C 1-6 alkyl groups), a C 2-6 alkenyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a C 2-6 alkynyl group which may have 1 to 2 substituents selected from Substituent Group ⁇ , a carbamoyl group which may be substituted with 1
• Substituent Group ⁇ refers to a halogen atom, a cyano group, a hydroxy group and a C 1-6 alkoxy group (wherein the alkoxy group may be substituted with a phenyl group which may be substituted with 1 to 3 substituents selected from a hydrogen atom, a halogen atom, a hydroxy group and a nitro group).
• the fused aminodihydrothiazine derivative of the formula (I) according to the present invention may be a pharmaceutically acceptable salt.
• the pharmaceutically acceptable salt include inorganic acid salts (such as sulfates, nitrates, perchlorates, phosphates, carbonates, bicarbonates, hydrofluorides, hydrochlorides, hydrobromides and hydroiodides), organic carboxylates (such as acetates, oxalates, maleates, tartrates, fumarates and citrates), organic sulfonates (such as methanesulfonates, trifluoromethanesulfonates, ethanesulfonates, benzenesulfonates, toluenesulfonates and camphorsulfonates), amino acid salts (such as aspartates and glutamates), quaternary amine salts, alkali metal salts (such as sodium salts and potassium salts) and alkali earth metal salts
• the fused aminodihydrothiazine derivative of the formula (I) or pharmaceutically acceptable salt thereof according to the present invention may be a solvate thereof.
• the solvate include a hydrate.
• the compound (I) is not limited to a specific isomer and includes all possible isomers (such as a keto-enol isomer, an imine-enamine isomer, a diastereoisomer, an optical isomer and a rotamer) and racemates.
• the compound (I) wherein R 1 is hydrogen includes the following tautomers.
• the fused aminodihydrothiazine derivative of the formula (I) according to the present invention is preferably a compound of the formula (I), wherein X is a methylene group which may have 1 to 2 substituents selected from Substituent Group ⁇ .
• the fused aminodihydrothiazine derivative of the formula (I) according to the present invention is also preferably a compound of the formula (I), wherein Z is an oxygen atom and Y is a C 1-3 alkylene group which may have 1 to 3 substituents selected from Substituent Group ⁇ ; or Z is a sulfur atom or a sulfone and Y is a C 1-3 alkylene group which may have a substituent selected from Substituent Group ⁇ .
• the fused aminodihydrothiazine derivative of the formula (I) according to the present invention is further preferably a compound of the formula (I), wherein L is —NR L CO— (wherein R L is a hydrogen atom or a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ).
• Preferable compounds in the present invention include the following compounds:
• the “leaving group” in the raw material compound used in preparation of the compound of the formula (I) according to the present invention may be any leaving group used for nucleophilic substitution reaction.
• the leaving group include a halogen atom, a C 1-6 alkylsulfonyloxy group which may be substituted with the above Substituent Group ⁇ and an arylsulfonyloxy group which may be substituted with the above Substituent Group ⁇ .
• the leaving group include a chlorine atom, a bromine atom, an iodine atom, a methanesulfonyloxy group, a trifluoromethanesulfonyloxy group and a p-toluenesulfonyloxy group.
• R 7 represents a C 1-6 alkyl group such as a methyl group or an ethyl group, a C 7-12 aralkyl group such as a benzyl group, or the like
• LV is a leaving group and represents a halogen atom (such as a chlorine atom, a bromine atom or an iodine atom), for example, or a sulfonyloxy group such as a methanesulfonyloxy group, a p-toluenesulfonyloxy group or a trifluoromethanesulfonyloxy group, for example
• Ring A, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , Y and Z are as defined above.
• General Preparation Method 1 is a method for preparing a compound (1-7) which is a synthetic intermediate of the compound (I) according to the present invention from a compound (1-1) as a raw material through multiple steps of Step 1-1 to Step 1-6.
• the compound (1-1) can be a commercially available product used as is, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 1-1 Step 1-1:
• This step is a step of obtaining a compound (1-2) by trifluoromethanesulfonylation of the compound (1-1).
• the reaction in this step can be performed under the same conditions as those usually used in trifluoromethanesulfonylation reaction of a carbonyl compound (such as the conditions described in J. Org. Chem., 57, 6972-6975 (1992), Tetrahedron Letters., 40, 8133-8136 (1999) and Tetrahedron., 61, 4129-4140 (2005)).
• the compound (1-2) can be obtained by causing a base to act on the compound (1-1), and then reacting the compound with N-phenyltrifluoromethanesulfonimide or trifluoromethanesulfonic anhydride, for example.
• This reaction can be performed by causing one or more equivalents of a base to act on the compound (1-1) in an organic solvent such as ether, tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane, dichloromethane, 1,2-dichloroethane, benzene or toluene, for example.
• Examples of the base used include sodium hydride, LDA (lithium diisopropylamide), lithium bis(trimethylsilyl)amide, diisopropylethylamine, pyridine and 2,6-lutidine.
• the reaction time is not particularly limited and is usually 5 minutes to 24 hours, and preferably 5 minutes to 12 hours.
• the reaction temperature is usually ⁇ 100° C. to room temperature, and more preferably ⁇ 78° C. to room temperature.
• Step 1-2
• This step is a step of obtaining a compound (1-3) by coupling reaction of the compound (1-2) using a transition metal.
• This reaction can be performed under the conditions usually used in coupling reaction using a transition metal (such as Suzuki coupling reaction or Stille coupling reaction).
• a transition metal such as Suzuki coupling reaction or Stille coupling reaction.
• Examples of the reaction using an organoboron reagent as an organometallic compound include reactions in documents such as Tetrahedron: Asymmetry 16 (2005) 2, 529-539 and Org. Lett. 6 (2004) 2, 277-279.
• Examples of the reaction using an organotin reagent include reaction in a document such as Tetrahedron 61 (2005) 16, 4129-4140.
• Examples of the reaction using an organozinc reagent as an organometallic compound include reaction in a document such as Tetrahedron 61 (2005) 16, 4129-4140.
• the organometallic catalyst used in this reaction is not particularly limited.
• the organometallic catalyst include tetrakis(triphenylphosphine)palladium (0), dichlorobis(triphenylphosphine)palladium (II), [1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloride, bis(tert-butylphosphine)palladium (0), palladium (II) acetate and [1,3-bis(diphenylphosphino)propane]nickel (II).
• the amount of the organometallic catalyst used is about 0.001 to 0.1 equivalent with respect to the raw material.
• the organometallic compound is not particularly limited.
• the organometallic compound include organotin reagents such as aryltri-n-butyltin, and organoboron reagents such as arylboronic acid.
• the amount of the organometallic compound used is one to five equivalents with respect to the raw material.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include benzene, toluene, xylene, N,N-dimethylformamide, 1-methyl-2-pyrrolidone, tetrahydrofiman, 1,4-dioxane, acetonitrile and propionitrile.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature, and preferably room temperature to solvent reflux temperature, for example.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in the presence of a base.
• a base is not particularly limited.
• the base include bases such as sodium carbonate, potassium carbonate, cesium carbonate, potassium phosphate and solutions thereof, and triethylamine.
• Step 1-3
• This step is a step of obtaining an alcohol compound (1-4) by subjecting the ester compound (1-3) to reduction reaction.
• the alcohol compound (1-4) can be obtained from the ester compound (1-3) by a method known to a person skilled in the art.
• Examples of the reducing agent used in the reaction include lithium aluminum hydride, lithium borohydride and diisobutylaluminum hydride.
• the reaction temperature is not particularly limited and is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 78° C. to room temperature.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Preferable examples of the solvent include tetrahydrofuran, diethyl ether, toluene and dichloromethane.
• Step 1-4
• This step is a step of obtaining a compound (1-5) by converting the hydroxyl group of the compound (1-4) to a leaving group.
• Examples of the leaving group include halogen atoms (such as a chlorine atom, a bromine atom and an iodine atom) and sulfonyloxy groups such as a methanesulfonyloxy group, a p-toluenesulfonyloxy group and a trifluoromethanesulfonyloxy group.
• halogen atoms such as a chlorine atom, a bromine atom and an iodine atom
• sulfonyloxy groups such as a methanesulfonyloxy group, a p-toluenesulfonyloxy group and a trifluoromethanesulfonyloxy group.
• the reaction can be performed under the same conditions as those usually used in reaction of converting a hydroxyl group to such a leaving group.
• the leaving group is a halogen atom
• the compound (1-5) can be prepared by reacting the compound (1-4) with thionyl chloride, thionyl bromide, phosphorus tribromide or tetrahalogenomethane-triphenylphosphine, for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Preferable examples of the solvent include benzene, toluene, xylene, dichloromethane and chloroform.
• the reaction temperature is usually ⁇ 78° C. to solvent reflux temperature, and preferably ice-cold temperature to solvent reflux temperature.
• the reaction time is not particularly limited and is usually 5 minutes to 48 hours, and preferably 5 minutes to 12 hours.
• the compound (1-5) can be prepared by reacting the compound (1-4) with methanesulfonyl chloride, p-toluenesulfonyl chloride or trifluoromethanesulfonic anhydride, for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include tetrahydrofuran, toluene, xylene, dichloromethane, chloroform and N,N-dimethylformamide.
• the reaction temperature is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 78° C. to room temperature.
• a favorable result such as an improved yield may be achieved by addition of a base.
• the base used is not particularly limited insofar as it does not inhibit the reaction.
• the base include sodium carbonate, potassium carbonate, triethylamine, pyridine and diisopropylethylamine.
• Step 1-5 Step 1-5:
• This step is a step of obtaining a compound (1-6) from the compound (1-5).
• the thiourea compound (1-6) can be obtained from the compound (1-5) by a method known to a person skilled in the art.
• the compound (1-6) can be obtained by reacting the compound (1-5) with thiourea in a solvent, for example.
• This reaction can be performed by causing one or more equivalents of thiourea to act on the compound (1-5) in an organic solvent such as ethanol, 1-propanol, 2-propanol, 1-butanol, tetrahydrofuran, 1,4-dioxane or N,N-dimethylformamide, for example.
• the reaction time is not particularly limited and is usually 5 minutes to 24 hours, and preferably 5 minutes to 12 hours.
• the reaction temperature is usually 0° C. to 150° C., and more preferably room temperature to 100° C.
• Step 1-6
• This step is a method of obtaining the compound (1-7) by cyclizing the compound (1-6) with an acid.
• This reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the reaction can be performed by causing one equivalent to a large excess of an appropriate acid to act on the compound in the presence or absence of a solvent such as benzene, toluene or dichloromethane.
• an acid may also be used as a solvent. Examples of the acid used include sulfuric acid, trifluoroacetic acid, methanesulfonic acid, trifluoromethanesulfonic acid and mixtures thereof.
• the reaction time is not particularly limited and is usually 1 to 72 hours, and preferably 1 to 48 hours.
• the reaction temperature is usually ice-cold temperature to solvent reflux temperature.
• the compound (1-7), wherein both R 1 and R 2 are hydrogen atoms, can be converted to the compound (1-7), wherein at least one of R 1 and R 2 is substituted with a substituent, by further reaction with a corresponding halide compound or the like such as a C 1-6 alkyl halide, a C 1-6 alkylcarbonyl halide, a C 6-14 arylcarbonyl halide, a C 1-6 alkylsulfonyl halide, a C 6-14 arylsulfonyl halide, a 3- to 10-membered carbocyclic halide or a 5- to 10-membered heterocyclic halide.
• a corresponding halide compound or the like such as a C 1-6 alkyl halide, a C 1-6 alkylcarbonyl halide, a C 6-14 arylcarbonyl halide, a C 1-6 alkylsulfonyl halide, a C 6-14
• Ring A, R 3 , R 4 , R 5 , R 6 , Y and Z are as defined above.
• General Preparation Method 2 is a method for preparing a compound of the general formula (1-4) which is a synthetic intermediate of the compound (I) according to the present invention from a compound (2-1) as a raw material through multiple steps of Step 2-1 to Step 2-3.
• the compound (2-1) can be a commercially available product used as is, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• This step is a step of obtaining a compound (2-2) from the compound (2-1).
• This reaction can be performed under the same conditions as those usually used in reaction of synthesizing a compound (2-2) from a carbonyl compound (such as the conditions described in J. Org. Chem., 47, 3597-3607 (1982)).
• Step 2-2
• This step is a step of synthesizing a compound (2-3) from the compound (2-2) as a raw material using a method described in the above preparation method (Step 1-2).
• This step is a step of obtaining the alcohol compound (1-4) by subjecting the aldehyde compound (2-3) to reduction reaction.
• the alcohol compound (1-4) can be obtained from the aldehyde compound (2-3) by a method known to a person skilled in the art.
• the reducing agent used in the reaction include sodium borohydride, sodium cyanoborohydride and sodium triacetoxyborohydride.
• the reaction temperature is not particularly limited and is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 20° C. to room temperature.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Preferable examples of the solvent include methanol, ethanol, tetrahydrofuran, ether, toluene and dichloromethane.
• L 1 represents a single bond or a C 1-6 alkyl group and Ring A, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, Y, Z and Ring B are as defined above.
• General Preparation Method 3 is a method for preparing the compound of the general formula (I) according to the present invention, wherein L is a —NHCO—C 1-6 alkyl group and R 1 and R 2 are hydrogen atoms, from a compound (3-1) as a raw material through multiple steps of Step 3-1 to Step 3-4.
• the compound (3-1) can be prepared from a commercially available product by General Preparation Method 1, General Preparation Method 2, General Preparation Method 4 or a combination of these three methods, and can also be prepared by a method described in Preparation Examples among Examples.
• Compounds (3-4) and (3-5) can be commercially available products used directly, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 3-1 Step 3-1:
• This step is a step of obtaining a compound (3-2) by t-butoxycarbonylation of the amino group of the compound (3-1) when R 1 and R 2 are both hydrogen.
• the reaction can be performed under the same conditions as those generally used in t-butoxycarbonylation of an amino compound such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Second Edition”, John Wiley & Sons (1991), p. 327-330.
• the compound (3-2) can be obtained by reacting the compound (3-1) with di-tert-butyl dicarbonate using triethylamine as a base in a solvent such as tetrahydrofuran, for example.
• This step is a step of obtaining a compound (3-3) from the compound (3-2).
• the compound (3-3) is synthesized by reducing the nitro compound (3-2) by a synthesis method known to a person skilled in the art.
• the method include reduction by catalytic hydrogenation using a noble metal catalyst such as Raney nickel, palladium, ruthenium, rhodium or platinum.
• a noble metal catalyst such as Raney nickel, palladium, ruthenium, rhodium or platinum.
• reduction reaction with iron under neutral conditions using ammonium chloride is preferable, for example.
• Step 3-3 Step 3-3:
• This step is a step of obtaining a compound (3-6) by condensing the compound (3-3) with the compound (3-4) using a condensing agent.
• this step is a step of obtaining a compound (3-6) by condensing the compound (3-3) with the compound (3-5) by acylation reaction.
• the condensation reaction of the compound (3-3) with the compound (3-4) using a condensing agent can be performed under the same conditions as those usually used and described in the following documents.
• Examples of the known method include those in Rosowsky, A.; Forsch, R. A.; Moran, R. G; Freisheim, J. H.; J. Med. Chem., 34 (1), 227-234 (1991), Brzostwska, M.; Brossi, A.; Flippen-Anderson, J. L.; Heterocycles, 32 (10), 1969-1972 (1991), and Romero, D. L.; Morge, R. A.; Biles, C.; Berrios-Pena, N.; May, P. D.; Palmer, J.
• the compound (3-3) may be a free form or a salt.
• the solvent in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include tetrahydrofuran, 1,4-dioxane, ethyl acetate, methyl acetate, dichloromethane, chloroform, N,N-dimethylformamide, toluene and xylene.
• condensing agent examples include CDI (N,N-carbonyldiimidazole), Bop (1H-1,2,3-benzotriazol-1-yloxy(tri(dimethylamino))phosphonium hexafluorophosphate), WSC (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride), DCC(N,N-dicyclohexylcarbodiimide), diethylphosphoryl cyanide, PyBOP (benzotriazol-1-yloxytris(pyrrolidino)phosphonium hexafluorophosphate) and EDC-HCl (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride).
• CDI N,N-carbonyldiimidazole
• Bop (1H-1,2,3-benzotriazol-1-yloxy(tri(dimethylamino))phosphon
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• the reaction temperature varies according to the raw material used, the solvent and the like and is not particularly limited. Ice-cold temperature to solvent reflux temperature is preferable.
• This step is a step of obtaining the compound (I-a) by deprotection reaction of the t-butoxycarbonyl group of the compound (3-6).
• the reaction can be performed under the same conditions as those generally used in deprotection reaction of a t-butoxycarbonyl group such as the conditions described in a document such as T. W. Green and P. G M. Wuts, “Protective Groups in Organic Chemistry, Second Edition”, John Wiley & Sons (1991), p. 327-330.
• the compound (I-a) can be obtained by reacting trifluoroacetic acid with the compound (3-6) in a solvent such as dichloromethane, for example.
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , can be obtained by
• the compound of the formula (I) according to the present invention wherein L is —NR L CO— (wherein R L is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), can be obtained by further reacting the compound (I-a) obtained in General Preparation Method 3 with a corresponding halide compound or the like such as a C 1-6 alkyl halide.
• the compound of the formula (I) according to the present invention wherein L is —NR L SO 2 — (wherein R L is a hydrogen atom), can be obtained using a corresponding sulfonyl compound or sulfonyl halide compound in place of the compound (3-4) or (3-5) used in General Preparation Method 3.
• the compound of the formula (I) according to the present invention, wherein L is —NR L SO 2 — (wherein R L is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ) can be obtained by further reacting this compound with a corresponding halide compound or the like such as a C 1-6 alkyl halide.
• the compound (3-6) can also be prepared from the compound (3-3) and the compound (3-4) by a method described in the following alternative method (1) or (2).
• the compound (3-6) can be obtained by converting the compound (3-4) to a mixed acid anhydride and then reacting the mixed acid anhydride with the compound (3-3).
• the mixed acid anhydride can be synthesized by a means known to a person skilled in the art. The synthesis is performed by reacting the compound (3-4) with a chloroformate such as ethyl chloroformate in the presence of a base such as triethylamine, for example. One to two equivalents of the chloroformate and the base are used with respect to the compound (3-4).
• the reaction temperature is ⁇ 30° C. to room temperature, and preferably ⁇ 20° C. to room temperature.
• the step of condensing the mixed acid anhydride with the compound (3-3) is performed by reacting the mixed acid anhydride with the compound (3-3) in a solvent such as dichloromethane, tetrahydrofuran or N,N-dimethylformamide, for example.
• a solvent such as dichloromethane, tetrahydrofuran or N,N-dimethylformamide, for example.
• One equivalent to a large excess of the compound (3-3) is used with respect to the mixed acid anhydride.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 12 hours.
• the reaction temperature is ⁇ 20° C. to 50° C., and preferably ⁇ 20° C. to room temperature.
• the compound (3-6) can be obtained by converting the compound (3-4) to an active ester and then reacting the active ester with the compound (3-3).
• the step of obtaining the active ester is performed by reacting the compound (3-4) with an active ester synthesis reagent in a solvent such as 1,4-dioxane, tetrahydrofuran or N,N-dimethylformamide in the presence of a condensing agent such as DCC, for example.
• a condensing agent such as DCC, for example.
• the active ester synthesis reagent include N-hydroxysuccinimide.
• One to 1.5 equivalents of the active ester synthesis reagent and the condensing agent are used with respect to the compound (3-4).
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is ⁇ 20° C. to 50° C., and preferably ⁇ 20° C. to room temperature.
• the step of condensing the active ester with the compound (3-3) is performed by reacting the active ester with the compound (3-3) in a solvent such as dichloromethane, tetrahydrofuran or N,N-dimethylformamide, for example.
• a solvent such as dichloromethane, tetrahydrofuran or N,N-dimethylformamide, for example.
• One equivalent to a large excess of the compound (3-3) is used with respect to the active ester.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is ⁇ 20° C. to 50° C., and preferably ⁇ 20° C. to room temperature.
• the compound (3-6) can be obtained from the compounds (3-3) and (3-5) by a method known to a person skilled in the art.
• Examples of the base used in the reaction include triethylamine, pyridine, potassium carbonate and diisopropylethylamine.
• the reaction temperature is not particularly limited and is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 20° C. to room temperature.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Preferable examples of the solvent include tetrahydrofuran, ether, toluene and dichloromethane.
• Ring A, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, Y and Z are as defined above.
• General Preparation Method 4 is a method for preparing a compound of the general formula (3-1) which is a synthetic intermediate of the compound according to the present invention from a compound (4-1) as a raw material through Step 4-1.
• the compound (4-1) can be prepared from a commercially available product by General Preparation Method 1, General Preparation Method 2, General Preparation Method 5 or a combination of these methods, and can also be prepared by a method described in Preparation Examples among Examples.
• Step 4-1 Step 4-1:
• This step is a step of obtaining the compound (3-1) by nitration reaction of the compound (4-1).
• the compound (3-1) can be obtained from the compound (4-1) by a method known to a person skilled in the art.
• the nitrating agent used in the reaction include potassium nitrate/concentrated sulfuric acid and fuming nitric acid/acetic anhydride.
• the reaction temperature is not particularly limited and is usually ⁇ 20° C. to room temperature.
• Pit represents a protecting group such as a benzoyl group, an acetyl group or a 9-fluorenemethyloxycarbonyl group (Fmoc group), and Ring A, R 3 , R 4 , R 5 , R 6 , Y and Z are as defined above.
• General Preparation Method 5 is a method for preparing a compound (1-7) which is a synthetic intermediate of the compound (I) according to the present invention from a compound (5-1) as a raw material through multiple steps of Step 5-1 to Step 5-7.
• the compound (5-1) can be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 5-1 Step 5-1:
• This step is a step of obtaining a compound (5-2) by oximation of the compound (5-1).
• the reaction in this step can be performed under the same conditions as those usually used in oximation reaction of a carbonyl compound such as the conditions described in Org. Lett. 9 (2007) 5, 753-756, Tetrahedron: Asymmetry 5 (1994) 6, 1018-1028 and Tetrahedron 54 (1998) 22, 5869-5882.
• the compound (5-2) can be obtained by reacting the compound (5-1) with hydroxylamine or a hydroxylamine salt (such as hydroxylamine hydrochloride or hydroxylamine sulfate) in the presence of a base or in the absence of a base, for example.
• hydroxylamine or a hydroxylamine salt such as hydroxylamine hydrochloride or hydroxylamine sulfate
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include organic solvents such as ethanol, methanol, tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane and dichloromethane, and mixtures of these solvents and water.
• the base used include sodium acetate, pyridine, sodium hydroxide, cesium hydroxide, barium hydroxide and 2,6-lutidine.
• the reaction time is not particularly limited and is usually 5 minutes to 24 hours, and preferably 5 minutes to 12 hours.
• the reaction temperature is usually ⁇ 20° C. to solvent reflux temperature, and more preferably 0° C. to solvent reflux temperature.
• This step is a step of obtaining a compound (5-3) by converting the compound (5-2) to a nitrile oxide derivative and performing 1,3-dipolar cycloaddition reaction with the olefin moiety in the same molecule.
• the reaction in this step can be performed under the same conditions as those usually used in 1,3-dipolar cycloaddition reaction such as the conditions described in a document such as Org. Lett. 9 (2007) 5, 753-756, Tetrahedron: Asymmetry 5 (1994) 6, 1018-1028 and Tetrahedron 54 (1998) 22, 5869-5882.
• Examples of the reagent for converting the oxime compound to the nitrile oxide include N-chlorosuccinimide and sodium hypochlorite.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include dichloromethane, chloroform, benzene, toluene, xylene, N,N-dimethylformamide, tetrahydrofuran and 1,4-dioxane.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in the presence of a base.
• a base is not particularly limited.
• the base include bases such as sodium carbonate, potassium carbonate, cesium carbonate, potassium phosphate and solutions thereof, and triethylamine and pyridine.
• Step 5-3 Step 5-3:
• This step is a step of obtaining a compound (5-4) by addition reaction of an aryllithium reagent (including heterocyclic) or a Grignard reagent (including heterocyclic) with the compound (5-3).
• the reaction in this step can be performed under the same conditions as those described in J. Am. Chem. Soc. 2005, 127, 5376-5383, Bull. Chem. Soc. Jpn., 66, 2730-2737 (1993) and SYNLETT 2004, No. 8, pp 1409-1413, for example.
• the aryllithium reagent (including heterocyclic) or the Grignard reagent (including heterocyclic) can be prepared by a method known to a person skilled in the art.
• a corresponding aryl (including heterocyclic) lithium reagent or aryl (including heterocyclic) magnesium reagent can be prepared by halogen-metal exchange between an aryl halide compound and a commercially available organometallic reagent such as an alkyllithium reagent such as n-, sec- or tert-butyllithium or a Grignard reagent such as isopropylmagnesium bromide, or metallic magnesium, for example.
• the solvent used in this step varies according to the starting material and the reagent used, and is not particularly limited insofar as it does not inhibit the reaction, allows the starting material to be dissolved therein to a certain extent, and is always inert during the reaction.
• the solvent include organic solvents such as diethyl ether, tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane, benzene and toluene, and mixed solvents thereof.
• the reaction time is not particularly limited and is usually 0.1 to 48 hours, and preferably 0.1 to 12 hours.
• the reaction temperature varies according to the starting material, the reagent used and the like, and is preferably maintained to be low, for example, at ⁇ 78° C. to minimize formation of a by-product.
• TMEDA tetramethylethylenediamine
• HMIPA hexamethylphosphoramide
• Lewis acid such as a boron trifluoride-diethyl ether complex (BF3.OEt2) as an additive, for example.
• This step is a step of obtaining a compound (5-5) by subjecting the compound (5-4) to reductive cleavage reaction of the N—O bond.
• the reductive cleavage reaction of the N—O bond can be performed under the conditions using zinc-acetic acid, a metal catalyst such as hydrogen-platinum oxide, or lithium aluminum hydride, for example.
• the reaction using zinc such as zinc-acetic acid can be performed under the same conditions as those described in J. Org. Chem. 2003, 68, 1207-1215 and Org. Lett. 7 (2005) 25, 5741-5742, for example.
• the acid used include acetic acid, formic acid and hydrochloric acid.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent. Examples of the solvent include methanol, ethanol, 1,4-dioxane, THF and water.
• the above acid may also be used as a solvent.
• the reaction temperature is usually ⁇ 20° C. to solvent reflux temperature, and preferably ice-cold temperature to solvent reflux temperature.
• the reaction time is not particularly limited and is usually 5 minutes to 48 hours, and preferably 5 minutes to 24 hours.
• the reaction using a metal catalyst such as hydrogen-platinum oxide can be performed under the same conditions as those described in Tetrahedron: Asymmetry 5 (1994) 6, 1019-1028 and Tetrahedron, Vol. 53, No. 16, pp 5752-5746, 1997, for example.
• the compound (5-5) can be obtained by hydrogenating the compound (5-4) using platinum oxide as a catalyst in a solvent such as methanol, for example.
• the reaction using lithium aluminum hydride can be performed under the same conditions as those described in Bull. Chem. Soc. Jpn., 66, 2730-2737 (1993), for example.
• the compound (5-5) can be obtained by reducing the compound (5-4) using lithium aluminum hydride in a solvent such as ether, for example.
• Step 5-5 Step 5-5:
• This step is a step of obtaining a compound (5-6) from the compound (5-5).
• the thiourea derivative (5-6) can be obtained from the compound (5-5) by a method known to a person skilled in the art.
• the compound (5-6) can be obtained in this step by reacting the compound (5-5) with benzoyl isothiocyanate in a solvent such as dichloromethane or toluene.
• a solvent such as dichloromethane or toluene.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent. Examples of the solvent include dichloromethane, chloroform, toluene, methanol, ethanol, 1,4-dioxane and THF.
• the reaction temperature is usually ⁇ 20° C. to solvent reflux temperature, and preferably ice-cold temperature to solvent reflux temperature.
• the reaction time is not particularly limited and is usually 5 minutes to 48 hours, and preferably 5 minutes to 24 hours.
• the compound (5-6) can be obtained in this step by reacting the compound (5-5) with fluorenemethyloxycarbonyl isothiocyanate in a solvent such as dichloromethane or toluene.
• a solvent such as dichloromethane or toluene.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include dichloromethane, chloroform, toluene, methanol, ethanol, 1,4-dioxane and THF.
• the reaction temperature is usually ⁇ 20° C. to solvent reflux temperature, and preferably ice-cold temperature to solvent reflux temperature.
• the reaction time is not particularly limited and is usually 5 minutes to 48 hours, and preferably 5 minutes to 24 hours.
• Step 5-6 Step 5-6:
• This step is a method of obtaining a compound (5-7) by cyclizing the compound (5-6).
• the compound (5-6) can be cyclized under various conditions to obtain the compound (5-7) by selecting a protecting group of the compound (5-6).
• the compound (5-7) can be obtained in this reaction by heating the compound (5-6) in a solvent such as methanol in the presence of an acid such as concentrated hydrochloric acid, for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include solvents such as methanol, ethanol, 1-propanol and water, mixed solvents thereof, and acids used as a solvent.
• the reaction can be performed by causing one equivalent to a large excess of an appropriate acid to act in the presence or absence of such a solvent.
• the acid used include concentrated hydrochloric acid, hydrobromic acid, sulfuric acid, trifluoroacetic acid, methanesulfonic acid, trifluoromethanesulfonic acid and mixtures thereof.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is usually ice-cold temperature to solvent reflux temperature.
• the compound (5-7) can be obtained by an alternative method 1 of reacting the compound (5-6) with trifluoromethanesulfonic anhydride in a solvent such as dichloromethane in the presence of a base such as pyridine.
• This reaction can be performed under the same conditions as those described in Chem Bio Chem. 2005, 6, 186-191, for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent examples include solvents such as dichloromethane, 1,2-dichloroethane, THF, 1,2-dimethoxyethane and toluene, and mixed solvents thereof.
• the reaction can be performed using 1 to 20 equivalents of an appropriate base in such a solvent.
• the base used include pyridine, 2,6-lutidine, sodium carbonate, potassium carbonate and mixtures thereof.
• the reaction time is not particularly limited and is usually 0.5 to 24 hours, and preferably 0.5 to 12 hours.
• the reaction temperature is usually ⁇ 78° C. to room temperature.
• the compound (5-7) can be obtained by an alternative method 2 of reacting the compound (5-6) with triphenylphosphine and carbon tetrabromide (or bromine) in a solvent such as dichloromethane.
• the reaction conditions are the same as those of bromination of a primary alcohol which are known to a person skilled in the art.
• Step 5-7
• This step is a method of obtaining the compound (1-7) by deprotecting the protecting group of the compound (5-7).
• the compound (1-7) can be obtained under deprotection conditions known to a person skilled in the art.
• the compound (1-7) can be obtained under the same conditions as those generally used in deprotection of a protecting group of an amine compound (such as the conditions described in a document such as T. W Green and P. G M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, p. 506-507 and J. Org. Chem. 1998, 63, 196-200).
• the compound (1-7) can be obtained by reacting the compound (5-7) with an excess of an amine such as pyrrolidine in a solvent such as acetonitrile, for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include dichloromethane, THF and acetonitrile.
• the reaction can be performed by causing one equivalent to a large excess of an appropriate base to act in the presence of such a solvent.
• the base used include piperidine, morpholine, pyrrolidine, TBAF and DBU.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is usually ice-cold temperature to solvent reflux temperature.
• the compound (1-7) can be obtained in this reaction by heating the compound (5-7) in a solvent such as methanol in the presence of a base such as DBU, for example.
• a solvent such as methanol
• DBU a base
• This reaction can be performed under the same conditions as those described in Synth. Commun. 32 (2), 265-272 (2002), for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include solvents such as methanol, ethanol and 1-propanol.
• the reaction can be performed using 1 to 20 equivalents of an appropriate base in such a solvent.
• the base used include DBU.
• the reaction time is not particularly limited and is usually 0.5 to 24 hours, and preferably 0.5 to 12 hours.
• the reaction temperature is usually room temperature to solvent reflux temperature.
• Ring A, R 3 , R 4 , R 6 , R 6 , Y, Z, L, LV and Ring B are as defined above, Alk represents a C1-6 alkyl group, R 8 represents a hydrogen atom or a C1-4 alkyl group, and L 1 represents a single bond or a C1-4 alkyl group, provided that R 8 and L 1 in the compound (6-6) have up to four carbon atoms in total.
• General Preparation Method 6 is a method for preparing the compound (I-b) of the general formula (I) according to the present invention, wherein L is a single bond, a C2-6 alkenylene group or a C2-6 alkynylene group and R 1 and R 2 are hydrogen atoms, from a compound (6-1) as a raw material through multiple steps of Step 6-1 to Step 6-3.
• the compound (6-1) can be prepared from a commercially available product by General Preparation Method 1, General Preparation Method 5 or a combination of General Preparation Method 1 and General Preparation Method 11, and can also be prepared by a method described in Preparation Examples among Examples.
• the compounds (6-3), (6-4), (6-5) and (6-6) can be commercially available products used directly, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 6-1 Step 6-1:
• This step is a step of obtaining a compound (6-2) by di-t-butoxycarbonylating the compound (6-1).
• This reaction can be performed under the same conditions as those generally used in t-butoxycarbonylation of an amide compound such as the conditions described in T. W Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 642-643 and J. Org. Chem. 2005, 70, 2445-2454.
• the compound (6-2) can be obtained by reacting the compound (6-1) with di-tert-butyl dicarbonate using 4-dimethylaminopyridine as a base in a solvent such as THF, for example.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include organic solvents such as tetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane, dichloromethane, DMF and acetonitrile, and mixed solvents thereof.
• the base used include triethylamine, 4-dimethylaminopyridine, DBU and mixtures thereof.
• a catalytic amount to an excess of, and more preferably 0.1 to 5 equivalents of the base is used with respect to the compound (6-1).
• Two equivalents to an excess of, and more preferably 2 to 10 equivalents of di-tert-butyl dicarbonate is used with respect to the compound (6-1).
• the reaction time is not particularly limited and is usually 5 minutes to 24 hours, and preferably 5 minutes to 12 hours.
• the reaction temperature is usually ⁇ 20° C. to solvent reflux temperature, and more preferably 0° C. to solvent reflux temperature.
• This step is a step of obtaining a compound (6-7) by coupling reaction of the compound (6-2) with the compound (6-3), (6-4), (6-5) or (6-6) using a transition metal.
• This reaction can be performed under the conditions usually used in coupling reaction using a transition metal (such as Suzuki coupling reaction, Stille coupling reaction, Sonogashira reaction or Heck reaction).
• Examples of the Suzuki coupling reaction include reactions in documents such as J. Org. Chem. 2007, 72, 7207-7213, J. Am. Chem. Soc. 2000, 122, 4020-4028 and J. Org. Chem. 2007, 72, 5960-5967.
• Examples of the Stille coupling reaction include reaction in a document such as J. Am. Chem. Soc. 1990, 112, 3093-3100.
• Examples of the Sonogashira reaction include reactions in documents such as J. Org. Chem. 2007, 72, 8547-8550 and J. Org. Chem. 2008, 73, 234-240.
• Examples of the Heck reaction include reaction in a document such as J. Am. Chem. Soc. 2005, 127, 16900-16911.
• the organometallic catalyst used in this reaction is not particularly limited.
• the organometallic catalyst include metal catalysts such as tetrakis(triphenylphosphine)palladium (0), dichlorobis(triphenylphosphine)palladium (II), [1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloride, bis(tert-butylphosphine)palladium (0), palladium (II) acetate and [1,3-bis(diphenylphosphino)propane]nickel (II), and mixtures of these metal catalysts.
• metal catalysts such as tetrakis(triphenylphosphine)palladium (0), dichlorobis(triphenylphosphine)palladium (II), [1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloride, bis(tert
• the amount of the organometallic catalyst used is about 0.001 to 0.5 equivalent with respect to the raw material.
• the amount of the compound (6-3), (6-4), (6-5) or (6-6) used is not particularly limited and is usually 1 to 5 equivalents with respect to the compound (6-2).
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• Preferable examples of the solvent include benzene, toluene, xylene, N,N-dimethylformamide, 1-methyl-2-pyrrolidone, tetrahydrofuran, 1,2-dimethoxyethane, 1,4-dioxane, acetonitrile and propionitrile.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature, and preferably room temperature to solvent reflux temperature, for example.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in the presence of a base or a salt.
• a base or salt is not particularly limited.
• the base or salt include bases or salts such as sodium carbonate, potassium carbonate, barium hydroxide, cesium carbonate, potassium phosphate, potassium fluoride and solutions thereof, and triethylamine, N,N-diisopropylethylamine, lithium chloride and copper (I) iodide.
• Step 6-3 Step 6-3:
• This step is a step of synthesizing the compound (I-b) from the compound (6-7) as a raw material using a method described in the above preparation method (Step 3-4).
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group cc, can be obtained
• Ring A, Ring B, R 3 , R 4 , R 5 , R 6 , Z, Y, L and LV are as defined above.
• General Preparation Method 7 is a method for preparing the compound (I-b) of the general formula (I) according to the present invention, wherein L is a single bond and R 1 and R 2 are hydrogen atoms, from a compound (7-1) as a raw material through Step 7-1 to Step 7-2.
• the compound (7-1) can be prepared from a commercially available product by General Preparation Method 1, General Preparation Method 5 or a combination of General Preparation Method 1 and General Preparation Method 11, and can also be prepared by a method described in Preparation Examples among Examples.
• Step 7-1 Step 7-1:
• This step is a step of obtaining a compound (7-2) by benzyloxycarbonylation of the compound (7-1).
• the reaction can be performed under the same conditions as those generally used in benzyloxycarbonylation (modification with Z group) of an amino compound such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 531-537.
• the compound (7-2) can be obtained by reacting the compound (7-1) with benzyl chloroformate in a mixed solvent of 1,4-dioxane and a saturated sodium bicarbonate solution, for example.
• Step 7-2 Step 7-2:
• This step is a step of synthesizing the compound (I-b) from the compound (7-2) as a raw material using a method described in the above preparation method (Step 6-2).
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , can be obtained by
• Ring A, Ring B, R 3 , R 4 , R 5 , R 6 , Y, Z, L and LV are as defined above.
• General Preparation Method 8 is a method for preparing the compound (1-b) of the general formula (I) according to the present invention, wherein L is a single bond and R 1 and R 2 are hydrogen atoms, from a compound (6-2) as a raw material through multiple steps of Step 8-1 to Step 8-3.
• the compound (6-2) can be prepared from a commercially available product by General Preparation Method 6, and can also be prepared by a method described in Preparation Examples among Examples.
• a compound (8-2) can be a commercially available product used as is, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 8-1 Step 8-1:
• This step is a step of obtaining a compound (8-1) by coupling reaction of the compound (6-2) using a transition metal.
• the reaction in this step can be performed under the same conditions as those usually used in coupling reaction using a transition metal such as the conditions described in Org. Lett. 2007, Vol. 9, No. 4, 559-562 and Bioorg. Med. Chem., 14 (2006) 4944-4957.
• the compound (8-1) can be obtained by reacting the compound (6-2) with bis(pinacolato)diborane under heating conditions in a solvent such as DMF in the presence of a catalyst such as potassium acetate or [1,1′-bis(diphenylphosphino)ferrocene]palladium (H) dichloride, for example.
• the organometallic catalyst used in this reaction is not particularly limited.
• the organometallic catalyst include metal catalysts such as dichlorobis(triphenylphosphine)palladium (II), [1,1′-bis(diphenylphosphino)ferrocene]palladium (II) dichloride, bis(tert-butylphosphine)palladium (0), palladium (II) acetate and [1,3-bis(diphenylphosphino)propane]nickel (II).
• the amount of the organometallic catalyst used is about 0.001 to 0.5 equivalent with respect to the raw material.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction.
• the solvent include benzene, toluene, xylene, N,N-dimethylformamide, 1-methyl-2-pyrrolidone, dimethyl sulfoxide, tetrahydrofuran, 1,2-dimethoxyethane, 1,4-dioxane, acetonitrile and propionitrile.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature, and preferably room temperature to solvent reflux temperature, for example.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 24 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in the presence of a base.
• a base is not particularly limited.
• the base include bases such as potassium acetate, sodium acetate, sodium carbonate, potassium carbonate, cesium carbonate, potassium phosphate, potassium fluoride, triethylamine and N,N-diisopropylethylamine.
• Step 8-2 Step 8-2:
• This step is a step of synthesizing a compound (8-3) from the compound (8-1) as a raw material using a method described in the above preparation method (Step 6-2).
• Step 8-3 Step 8-3:
• This step is a step of synthesizing the compound (I-b) from the compound (8-3) as a raw material using a method described in the above preparation method (Step 3-4).
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , can be obtained by
• Ring A, Ring B, R 3 , R 4 , R 5 , R 6 , Y and Z are as defined above.
• General Preparation Method 9 is a method for preparing the compound (I-a) of the general formula (I) according to the present invention, wherein L is —NHCO— and R 1 and R 2 are hydrogen atoms, from a compound (8-1) as a raw material through multiple steps of Step 9-1 to Step 9-4.
• the compound (8-1) can be prepared from a commercially available product by General Preparation Method 8, and can also be prepared by a method described in Preparation Examples among Examples.
• Step 9-1 Step 9-1:
• This step is a step of obtaining a compound (9-1) by reaction of the compound (8-1) with sodium azide in the presence of a copper catalyst.
• the reaction in this step can be performed under the same conditions as those described in Org. Lett. 2007, Vol. 9, No. 5, 761-764 and Tetrahedron Lett. 2007, 48, 3525-3529, for example.
• the compound (9-1) can be obtained by reacting the compound (8-1) with sodium azide at room temperature using a solvent such as methanol in the presence of a catalyst such as copper (II) acetate, for example.
• the catalyst used in this reaction is not particularly limited.
• the catalyst include metal catalysts such as copper (II) acetate, copper (II) sulfate, copper (I) iodide and copper (I) chloride.
• the amount of the catalyst used is not particularly limited and is usually about 0.1 to 0.5 equivalent with respect to the raw material.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include methanol, N,N-dimethylformamide, 1-methyl-2-pyrrolidone, tetrahydrofuran, 1,2-dimethoxyethane, 1,4-dioxane, acetonitrile, propionitrile and dichloromethane.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature, and preferably room temperature to solvent reflux temperature, for example.
• the reaction time is not particularly limited and is usually 0.5 to 100 hours, and preferably 1 to 72 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in an oxygen atmosphere.
• Step 9-2 Step 9-2:
• This step is a step of obtaining a compound (9-2) by reduction reaction of the azide of the compound (9-1).
• the reaction in this step can be performed under the same conditions as those described in J. Org. Chem. 2003, 68, 4693-4699, for example.
• the compound (9-2) can be obtained by dissolving the compound (9-1) in a solvent such as methanol, and reacting the solution with sodium borohydride, for example.
• Step 9-3 Step 9-3:
• This step is a step of synthesizing a compound (9-3) from the compound (9-2) as a raw material using a method described in the above preparation method (Step 3-3).
• Step 9-4 Step 9-4:
• This step is a step of synthesizing the compound (I-a) from the compound (9-3) as a raw material using a method described in the above preparation method (Step 3-4).
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , can be obtained by
• the compound of the formula (I) according to the present invention wherein L is —NR L CO— (wherein R L is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ), can be obtained by further reacting the compound (1-a) obtained in General Preparation Method 9 with a corresponding halide compound or the like such as a C 1-6 alkyl halide.
• the compound of the formula (I) according to the present invention wherein L is —NR L SO 2 — (wherein R L is a hydrogen atom), can be obtained using a corresponding sulfonyl compound or sulfonyl halide compound in place of the compound (3-4) or (3-5) used in General Preparation Method 9.
• the compound of the formula (I) according to the present invention, wherein L is —NR L SO 2 — (wherein R L is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ) can be obtained by further reacting this compound with a corresponding halide compound or the like such as a C 1-6 alkyl halide.
• Ring A, Ring B, R 3 , R 4 , R 5 , R 6 , L and LV are as defined above;
• Ring D represents a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 6-membered heteroaryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ ;
• R 9 represents a C 6-14 aryl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 3- to 10-membered carbocyclic group which may have 1 to 3 substituents selected from Substituent Group
• General Preparation Method 10 is a method for preparing the compounds (I-m) to (I-q) of the general formula (I) according to the present invention, wherein Z is —NR M — (wherein R M is a hydrogen atom, a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 cycloalkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group
• the compound (10-1) can be prepared from a commercially available product by General Preparation Method 5, General Preparation Method 6, General Preparation Method 8, General Preparation Method 9 or a combination of these methods, and can also be prepared by a method described in Preparation Examples among Examples.
• Step 10-1 Step 10-1:
• This step is a step of obtaining a compound (10-2) by deprotecting the amino group of the compound (10-1).
• the reaction can be performed under the same conditions as those generally used in deprotection of a protecting group of an amino compound such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 494-572.
• the amino protecting group used in this step is not particularly limited.
• Prt2 is a 2,4-dimethoxybenzyl group
• the compound (10-2) can be obtained in this step under the same conditions as those generally used (such as the conditions described in a document such as Tetrahedron Vol. 47, No. 26, pp 4591-4602, 1991).
• Prt2 is a 2,4-dimethoxybenzyl group
• one Boc group can be deprotected simultaneously with deprotection of the 2,4-dimethoxybenzyl group.
• the solvent used in this step is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the first-step reaction solvent may be methylene chloride or chloroform
• the second-step reaction solvent may be methanol.
• the reaction temperature in this step is usually 0° C. to room temperature.
• the reaction time in this step is not particularly limited and is usually 0.5 to 24 hours, and preferably 0.5 to 12 hours.
• Prt2 is a benzyloxycarbonyl group
• the compound (10-2) can be obtained by deprotecting the compound (10-1) by hydrogenation using palladium-carbon as a catalyst in a solvent such as an alcohol, for example.
• This step is a step of synthesizing the compound (I-m) from the compound (10-2) as a raw material using a method described in the above preparation method ((Step 3-3) and (Step 3-4)).
• Step 10-3 Step 10-3:
• This step is a step of synthesizing the compound (I-n) from the compound (10-2) as a raw material using a method described in Step 3-4 after reductive amination reaction with a reducing agent such as borane or a boron hydride complex compound, for example.
• a reducing agent such as borane or a boron hydride complex compound
• Examples of the reductive amination reaction using a boron hydride complex compound include a method described in a document such as J. Org. Chem. 1996, 61, 3849.
• Examples of the boron hydride complex compound that can be used include sodium borohydride, sodium cyanoborohydride and sodium triacetoxyborohydride.
• Step 10-4 Step 10-4:
• This step is a step of synthesizing the compound (I-o) from the compound (10-2) as a raw material using a method described in Step 3-4 after sulfonylating the amino group using a sulfonyl chloride derivative known to a person skilled in the art.
• Step 10-5 Step 10-5:
• This step is a step of synthesizing the compound (I-p) from the compound (10-2) as a raw material using a method described in Step 3-4 after coupling reaction with a compound (15-1) or (15-2). Reaction such as coupling using a transition metal complex or the like or nucleophilic aromatic substitution (SNAr reaction) is used in the first step of this step.
• the reaction in the first step of this step can be performed under the same conditions as those described in Org. Lett. 2007, Vol. 9, No. 5, 761-764 and Org. Lett. 2003, Vol. 5, No. 23, 4397-4400, for example.
• the compound (10-2) can be reacted with the compound (15-1) at room temperature to 50° C. using a solvent such as dichloromethane in the presence of molecular sieve 4A and a catalyst such as copper (II) acetate, for example.
• the catalyst used in this reaction is not particularly limited.
• the catalyst include metal catalysts such as copper (II) acetate, copper (II) sulfate, copper (I) iodide and copper (I) chloride.
• the amount of the catalyst used is not particularly limited and is usually about 0.1 to 0.5 equivalent with respect to the raw material.
• the solvent used in this reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include N,N-dimethylformamide, 1-methyl-2-pyrrolidone, tetrahydrofuran, 1,2-dimethoxyethane, 1,4-dioxane, acetonitrile, propionitrile and dichloromethane.
• the reaction temperature is not particularly limited and is usually ice-cold temperature to solvent reflux temperature, and preferably room temperature to solvent reflux temperature, for example.
• the reaction time is not particularly limited and is usually 0.5 to 100 hours, and preferably 1 to 72 hours.
• a more preferable result such as an improved yield may be achieved by carrying out this reaction in an oxygen atmosphere.
• the reaction can be performed using the compound (10-2) and the compound (15-2) which is an aryl halide derivative, a heteroaryl halide derivative, an aryloxy trifluoromethanesulfonate derivative or a heteroaryloxy trifluoromethanesulfonate derivative under the same conditions as those usually used (such as the conditions described in a document such as Org. Lett. 2002, Vol. 4, No. 4, 581).
• the aryl halide derivative, the heteroaryl halide derivative, the aryloxy trifluoromethanesulfonate derivative or the heteroaryloxy trifluoromethanesulfonate derivative used in this step can be a commercially available product used as is, and can also be prepared from a commercially available product by a method known to a person skilled in the art.
• Examples of the transition metal complex used in this step include dichlorobis(triphenylphosphine)palladium (II), tetrakis(triphenylphosphine)palladium (0), tris(dibenzylideneacetone)palladium (0) and a copper-diol ligand complex.
• a phosphorus ligand such as preferably triphenylphosphine, tri-o-tolylphosphine, tri-tert-butylphosphine, 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl or 1,1′-bis(diphenylphosphino)ferrocene
• a phosphorus ligand such as preferably triphenylphosphine, tri-o-tolylphosphine, tri-tert-butylphosphine, 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl or 1,1′-bis(diphenylphosphino)ferrocene
• the transition metal complex used is a palladium complex
• the reaction in this step is preferably performed in a nitrogen or argon atmosphere.
• the solvent used in this step is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the transition metal complex used is a palladium complex
• N,N-dimethylformamide, N-methyl-2-pyrrolidone, 1,4-dioxane, toluene, xylene or the like can be used.
• the transition metal complex used is a copper-diol complex, 2-propanol or the like can be used.
• the reaction temperature in this step is usually room temperature to solvent reflux temperature.
• the reaction time in this step is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 24 hours.
• the reaction can be performed using the compound (10-2) and the compound (15-2) which is an aryl halide derivative, a heteroaryl halide derivative, an aryloxy trifluoromethanesulfonate derivative or a heteroaryloxy trifluoromethanesulfonate derivative in the presence of a base under the same conditions as those usually used.
• SNAr reaction nucleophilic aromatic substitution
• the aryl halide derivative, the heteroaryl halide derivative, the aryloxy trifluoromethanesulfonate derivative or the heteroaryloxy trifluoromethanesulfonate derivative used in this step can be a commercially available product used as is, and can also be prepared from a commercially available product by a method known to a person skilled in the art.
• the nucleophilic aromatic substitution (SNAr reaction) used in this step can be performed under the same conditions as those generally used (such as the conditions according to methods described in documents such as Org. Prep. Proced. int. 39 (2007) 4, 399-402, Bioorg. Med. Chem. Lett. 15 (2005) 9, 2409-2413 and Bioorg. Med. Chem. Lett.
• the solvent used in this step is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Examples of the solvent that can be used include N,N-dimethylformamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide and acetonitrile.
• the base used in this step is not particularly limited. Examples of the base include potassium carbonate, sodium carbonate, sodium hydride and tetrabutylammonium fluoride. Potassium carbonate, sodium carbonate and tetrabutylammonium fluoride are preferably used.
• the reaction temperature in this step is usually room temperature to solvent reflux temperature.
• the reaction time in this step is not particularly limited and is usually 0.5 to 24 hours, and preferably 0.5 to 12 hours.
• Step 10-6 Step 10-6:
• This step is a step of synthesizing the compound (I-q) from the compound (10-2) as a raw material using a method described in Step 3-4 after N-alkylation reaction of the amino compound.
• the first step in this reaction can be performed under the same conditions as those usually used in N-alkylation reaction of an amino compound (such as the conditions described in J. Med. Chem. 2002, 45, 3794-3804 and J. Med. Chem. 2000, 43, 3809-3812).
• R 1 and R 2 is a C 1-6 alkyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylcarbonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 1-6 alkylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 6-14 arylsulfonyl group which may have 1 to 3 substituents selected from Substituent Group ⁇ , a C 3-8 hydrocarbon ring group which may have 1 to 3 substituents selected from Substituent Group ⁇ or a 5- to 10-membered heterocyclic group which may have 1 to 3 substituents selected from Substituent Group ⁇ , can be obtained by
• Ring A, R 3 , R 4 , R 5 , R 6 , R 7 , Y and Z are as defined above.
• General Preparation Method 11 is a method for preparing a compound (1-4) which is a synthetic intermediate of the compound (1) according to the present invention from a compound (1-3) as a raw material through Step 11-1 to Step 11-2.
• the compound (1-3) can be prepared from a commercially available product by General Preparation Method 1, and can also be prepared by a method described in Preparation Examples among Examples.
• Step 11-1 Step 11-1:
• This step is a step of obtaining a compound (11-1) by alkaline hydrolysis of the compound (1-3).
• the reaction can be performed under the same reaction conditions as those described in J. Med. Chem., 33 (9), 2621-2629 (1990), for example.
• the compound (11-1) can be obtained by adding a base such as sodium hydroxide to a solution of the compound (1-3), stirring the mixture for several hours to one day, and then treating the solution with an acid such as a citric acid solution, for example.
• a base such as sodium hydroxide
• an acid such as a citric acid solution
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include methanol, ethanol, 2-propanol, tetrahydrofuran and 1,4-dioxane.
• the base used is not particularly limited and is preferably sodium hydroxide, potassium hydroxide or lithium hydroxide, for example.
• the amount of the base used is one equivalent to a large excess, and preferably 1 to 20 equivalents with respect to the compound (1-3).
• the reaction time is not particularly limited and is usually 1 to 24 hours, and preferably 1 to 6 hours.
• the reaction temperature is not particularly limited and is usually room temperature to solvent reflux temperature.
• Step 11-2 Step 11-2:
• This step is a step of obtaining the compound (1-4) by subjecting the compound (11-1) to reduction reaction.
• the compound (1-4) can be obtained by converting the compound (11-1) to a mixed acid anhydride and then reacting the mixed acid anhydride with sodium borohydride.
• the mixed acid anhydride can be synthesized by a method known to a person skilled in the art. The synthesis is performed by reacting the compound (11-1) with a chloroformate such as ethyl chloroformate in the presence of a base such as triethylamine, for example. One to two equivalents of the chloroformate and the base are used with respect to the compound (11-1).
• the reaction temperature is ⁇ 30° C. to room temperature, and preferably ⁇ 20° C. to room temperature.
• the step of reacting the mixed acid anhydride with a reducing agent such as sodium borohydride is performed by reaction in a solvent such as tetrahydrofuran or 1,2-dimethoxyethane or in a mixed solution of the solvent and water, for example.
• a solvent such as tetrahydrofuran or 1,2-dimethoxyethane
• One equivalent to a large excess of the reducing agent such as sodium borohydride is used with respect to the mixed acid anhydride.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is not particularly limited and is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 20° C. to room temperature.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• Preferable examples of the solvent include tetrahydrofuran and ether.
• Prt 3 represents a primary hydroxyl protecting group
• R 14 represents a C1-6 alkyl group, or two R 14 together may form a ring
• R 15 represents a C1-6 alkyl group
• Y, R 3 , R 4 , R 5 , R 6 and LV are as defined above.
• General Preparation Method 12 is a method for preparing a compound (12-4) which is a synthetic intermediate of the compound (I) according to the present invention from compounds (12-1), (12-5), (12-7) and (12-9) as raw materials through various steps of Step 12-1 to Step 12-8.
• Compounds (12-1), (12-2), (12-5), (12-7), (12-9) and (12-10) can be commercially available products used directly, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 12-1 Step 12-1:
• This step is a step of obtaining a compound (12-3) by reaction of the compound (12-1) with the compound (12-2).
• This reaction can be performed under the same conditions as those usually used in O-alkylation reaction of an alcohol compound (such as the conditions described in Tetrahedron Lett. 46 (2005) 45, 7751-7755).
• the compound (12-3) can be obtained by adding a base such as sodium hydride to a solution of the compound (12-1) in THF to prepare an alkoxide, and then reacting the alkoxide with the compound (12-2), for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent. Examples of the solvent include solvents such as THE DMF and dimethyl sulfoxide.
• the reaction can be performed by causing 1 to 3 equivalents of an appropriate base to act in the presence of such a solvent.
• the base used include sodium hydride, potassium hydride and t-butoxypotassium.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 12 hours.
• the reaction temperature is usually ⁇ 20° C. to 100° C.
• a more preferable result such as an improved yield may be achieved by adding a salt such as tetrabutylammonium iodide in this reaction.
• This step is a step of obtaining an aldehyde compound (12-4) by subjecting the alcohol compound (12-3) to oxidation reaction.
• the aldehyde compound can be obtained from the alcohol compound by a method known to a person skilled in the art.
• Examples of the known oxidation method used in the reaction include Swern oxidation, Corey-Kim oxidation, Moffatt oxidation, PCC oxidation, PDC oxidation, Dess-Martin oxidation, SO 3 -pyridine oxidation and TEMPO oxidation.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent.
• the solvent include dimethyl sulfoxide, tetrahydrofuran, toluene, dichloromethane and chloroform.
• the reaction temperature is not particularly limited and is usually ⁇ 78° C. to solvent reflux temperature, and preferably ⁇ 78° C. to room temperature.
• the reaction time is not particularly limited and is usually 0.5 to 48 hours, and preferably 0.5 to 24 hours.
• This step is a step of synthesizing a compound (12-6) from the compound (12-5) as a raw material using a method described in the above preparation method (Step 12-1).
• Step 12-4 Step 12-4:
• This step is a step of obtaining the compound (12-3) by deprotecting the hydroxyl protecting group of the compound (12-6).
• the hydroxylprotecting group used in this step is not particularly limited.
• This reaction can be performed under the same conditions as those generally used in deprotection of an alcohol protecting group such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 17-245.
• Step 12-5 Step 12-5:
• This step is a step of synthesizing a compound (12-8) from the compound (12-7) as a raw material using a method described in the above preparation method (Step 12-1).
• Step 12-6 Step 12-6:
• This step is a step of obtaining the compound (12-4) by deprotecting the acetal group of the compound (12-8).
• This reaction can be performed under the same conditions as those generally used in deprotection of an aldehyde group such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 293-329.
• Step 12-7 Step 12-7:
• This step is a step of obtaining a compound (12-11) by reaction of the compound (12-9) with the compound (12-10).
• This reaction can be performed under the same conditions as those usually used in O-alkylation reaction of an alcohol compound (such as the conditions described in J. Chem. Soc., Perkin Trans. 1, 1999, 3143-3155).
• the compound (12-11) can be obtained by adding a base such as sodium hydride to a solution of the compound (12-9) in THF to prepare an alkoxide, and then reacting the alkoxide with the compound (12-10), for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent. Examples of the solvent include solvents such as THF, DMF and dimethyl sulfoxide.
• the reaction can be performed by causing 1 to 3 equivalents of an appropriate base to act in the presence of such a solvent.
• the base used include sodium hydride, potassium hydride and t-butoxypotassium.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 12 hours.
• the reaction temperature is usually ⁇ 20° C. to 100° C.
• a more preferable result such as an improved yield may be achieved by adding a salt such as tetrabutylammonium iodide in this reaction.
• Step 12-8 Step 12-8:
• This step is a step of synthesizing the compound (12-3) from the compound (12-11) as a raw material using a method described in the above preparation method ((Step 1-3) or (Steps 11-1 and 2)).
• R 14 represents a C 1-6 alkyl group, or two R 14 s together may form a ring such as 1,3-dioxolane or 1,3-dioxane
• Prt 2 represents a protecting group such as a 2,4-dimethoxybenzyl group
• R 3 , R 4 , R 5 , R 6 , Y and LV are as defined above.
• General Preparation Method 13 is a method for preparing a compound (13-5) which is a synthetic intermediate of the compound (I) according to the present invention from a compound (13-1) as a raw material through Step 13-1 to Step 13-3.
• Compounds (13-1) and (13-3) can be commercially available products used directly, can also be prepared from a commercially available product by a method known to a person skilled in the art, and can further be prepared by a method described in Preparation Examples among Examples.
• Step 13-1 Step 13-1:
• This step is a step of obtaining a compound (13-2) by protecting the amino group of the compound (13-1).
• This reaction can be performed under the same conditions as those generally used in protection of an amino group such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 494-572 and J. Med. Chem. 2007, 50, 5493-5508.
• This step is a step of obtaining a compound (13-4) by N-alkylation reaction of the compound (13-2) with the compound (13-3).
• This reaction can be performed under the same conditions as those usually used in N-alkylation reaction of a compound (13-2) (such as the conditions described in J. Med. Chem. 2007, 50, 5493-5508).
• the compound (13-4) can be obtained by adding a base such as powdery sodium hydroxide to a solution of the compound (13-2) in toluene, and then reacting the mixture with the compound (13-3), for example.
• the solvent used in the reaction is not particularly limited insofar as it does not inhibit the reaction and allows the starting material to be dissolved therein to a certain extent. Examples of the solvent include solvents such as toluene, THF, DMF and dimethyl sulfoxide.
• the reaction can be performed by causing 1 to 5 equivalents of an appropriate base to act in such a solvent.
• the base used include sodium hydroxide, potassium hydroxide, sodium hydride, potassium hydride and t-butoxypotassium.
• the reaction time is not particularly limited and is usually 0.5 to 72 hours, and preferably 0.5 to 24 hours.
• the reaction temperature is usually ⁇ 20° C. to 100° C.
• a more preferable result such as an improved yield may be achieved by adding a salt such as tetrabutylammonium iodide in this reaction.
• Step 13-3 Step 13-3:
• This step is a step of obtaining the compound (13-5) by deprotecting the acetal group of the compound (13-4).
• This reaction can be performed under the same conditions as those generally used in deprotection of an aldehyde group such as the conditions described in a document such as T. W. Green and P. G. M. Wuts, “Protective Groups in Organic Chemistry, Third Edition”, John Wiley & Sons, P. 293-329.
• the compound of the formula (I) according to the present invention obtained in this manner can be converted to a pharmaceutically acceptable salt by a conventional method where necessary.
• the salt can be prepared by a method in which methods typically used in the field of organic synthetic chemistry and the like are appropriately combined. Specific examples of the method include neutralization titration of a free solution of the compound of the present invention with an acid solution.
• the compound of the formula (I) according to the present invention can be converted to a solvate by subjecting the compound to solvate forming reaction known per se where necessary.
• the fused aminodihydrothiazine derivative or pharmaceutically acceptable salt thereof, or solvate thereof according to the present invention has an extremely excellent A ⁇ production inhibitory effect or BACE1 inhibitory effect and is extremely useful as a therapeutic agent for a neurodegenerative disease caused by A ⁇ and typified by Alzheimer-type dementia.
• the fused aminodihydrothiazine derivative or pharmaceutically acceptable salt thereof, or solvate thereof according to the present invention can be formulated by a conventional method.
• the dosage form include tablets, coated tablets such as film tablets and sugar-coated tablets, fine granules, granules, powders, capsules, syrups, troches, inhalants, suppositories, injections, ointments, eye drops, nasal drops, ear drops, cataplasms and lotions.
• solid preparations such as tablets, capsules, granules and powders can contain generally 0.01 to 100 wt %, and preferably 0.1 to 100 wt % of the fused aminodihydrothiazine derivative or pharmaceutically acceptable salt thereof, or solvate thereof according to the present invention as an active ingredient.
• the active ingredient is formulated by blending ingredients generally used as materials for a pharmaceutical preparation and adding an excipient, a disintegrant, a binder, a lubricant, a colorant and a corrective typically used, and adding a stabilizer, an emulsifier, an absorbefacient, a surfactant, a pH adjuster, a preservative and an antioxidant where necessary, for example, using a conventional method.
• ingredients include animal and vegetable oils such as soybean oil, beef tallow and synthetic glyceride; hydrocarbons such as liquid paraffin, squalane and solid paraffin; ester oils such as octyldodecyl myristate and isopropyl myristate; higher alcohols such as cetostearyl alcohol and behenyl alcohol; a silicone resin; silicone oil; surfactants such as polyoxyethylene fatty acid ester, sorbitan fatty acid ester, glycerol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil and a polyoxyethylene-polyoxypropylene block copolymer; water-soluble polymers such as hydroxyethylcellulose, polyacrylic acid, a carboxyvinyl polymer, polyethylene glycol, polyvinylpyrrolidone and methylcellulose; lower alcohols such as ethanol and isopropanol; polyhydric alcohols such as glycerol, propylene
• excipient used examples include lactose, corn starch, saccharose, glucose, mannitol, sorbitol, crystalline cellulose and silicon dioxide.
• binder used include polyvinyl alcohol, polyvinyl ether, methylcellulose, ethylcellulose, gum arabic, tragacanth, gelatin, shellac, hydroxypropylmethylcellulose, hydroxypropylcellulose, polyvinylpyrrolidone, a polypropylene glycol-polyoxyethylene block copolymer and meglumine.
• disintegrant used include starch, agar, gelatin powder, crystalline cellulose, calcium carbonate, sodium bicarbonate, calcium citrate, dextrin, pectin and carboxymethylcellulose calcium.
• Examples of the lubricant used include magnesium stearate, talc, polyethylene glycol, silica and hydrogenated vegetable oil.
• Examples of the colorant used include those permitted to be added to pharmaceuticals.
• Examples of the corrective used include cocoa powder, menthol, empasm, mentha oil, borneol and cinnamon powder. Obviously, the ingredients are not limited to the above additive ingredients.
• an oral preparation is prepared by adding the fused aminodihydrothiazine derivative or pharmaceutically acceptable salt thereof, or solvate thereof according to the present invention as an active ingredient, an excipient and, where necessary, a binder, a disintegrant, a lubricant, a colorant, a corrective and the like, and then forming the mixture into powder, fine granules, granules, tablets, coated tablets, capsules or the like by a conventional method.
• tablets or granules may be appropriately coated, for example, sugar coated, where necessary.
• a syrup or an injection preparation is prepared by adding a pH adjuster, a solubilizer, an isotonizing agent and the like, and a solubilizing agent, a stabilizer and the like where necessary by a conventional method.
• the injection may be a previously prepared solution, or may be powder itself or powder containing a suitable additive, which is dissolved before use.
• the injection can contain usually 0.01 to 100 wt %, and preferably 0.1 to 100 wt % of the active ingredient.
• a liquid preparation for oral administration such as a suspension or a syrup can contain usually 0.01 to 100 wt %, and preferably 0.1 to 100 wt % of the active ingredient.
• an external preparation can be prepared by any conventional method without specific limitations.
• a base material any of various materials usually used for a pharmaceutical, a quasi drug, a cosmetic or the like can be used.
• the base material include materials such as animal and vegetable oils, mineral oils, ester oils, waxes, higher alcohols, fatty acids, silicone oils, surfactants, phospholipids, alcohols, polyhydric alcohols, water-soluble polymers, clay minerals and purified water.
• a pH adjuster, an antioxidant, a chelator, a preservative and fungicide, a colorant, a flavor or the like can be added where necessary.
• ingredients such as an ingredient having a differentiation inducing effect, a blood flow enhancer, a bactericide, an antiphlogistic, a cell activator, vitamin, amino acid, a humectant and a keratolytic agent can be blended where necessary.
• the dose of the fused aminodihydrothiazine derivative or pharmaceutically acceptable salt thereof, or solvate thereof according to the present invention varies according to the degree of symptoms, age, sex, body weight, mode of administration, type of salt and specific type of disease, for example.
• the active ingredient is orally administered to an adult at about 30 ⁇ g to 10 g, preferably 100 ⁇ g to 5 g, and more preferably 100 ⁇ g to 1 g per day, or is administered to an adult by injection at about 30 ⁇ g to 1 g, preferably 100 ⁇ g to 500 mg, and more preferably 100 ⁇ g to 300 mg per day, in one or several doses, respectively.
• the compound of the present invention can be converted to a chemical probe for capturing a target protein in a bioactive low-molecular compound.
• the compound of the present invention can be converted to an affinity chromatography probe, a photoaffinity probe or the like by introducing a labeling group, a linker or the like into a moiety differing from a structural moiety essential for expression of activity of the compound by a technique described in J. Mass Spectrum. Soc. Jpn. Vol. 51, No. 5, 2003, p. 492-498 or WO 2007/139149, for example.
• Examples of the labeling group, the linker or the like used for the chemical probe include groups shown in the following group consisting of (1) to (5):
• protein labeling groups such as photoaffinity labeling groups (such as a benzoyl group, a benzophenone group, an azido group, a carbonylazido group, a diaziridine group, an enone group, a diazo group and a nitro group) and chemical affinity groups (such as a ketone group substituted at the ⁇ -carbon atom with a halogen atom, a carbamoyl group, an ester group, an alkylthio group, Michael acceptors such as ⁇ , ⁇ -unsaturated ketones and esters, and an oxirane group),
• photoaffinity labeling groups such as a benzoyl group, a benzophenone group, an azido group, a carbonylazido group, a diaziridine group, an enone group, a diazo group and a nitro group
• chemical affinity groups such as a ketone group substituted at the ⁇ -carbon atom with a halogen
• cleavable linkers such as —S—S—, —O—Si—O—, monosaccharides (such as a glucose group and a galactose group) and disaccharides (such as lactose), and enzymatically cleavable oligopeptide linkers,
• fishing tag groups such as biotin and 3-(4,4-difluoro-5,7-dimethyl-4H-3a,4a-diaza-4-bora-s-indacen-3-yl)propionyl,
• detectable markers such as radioactive labeling groups such as 125 I, 32 P, 3 H and 14 C; fluorescence labeling groups such as fluorescein, rhodamine, dansyl, umbelliferone, 7-nitrofurazanyl and 3-(4,4-difluoro-5,7-dimethyl-4H-3a,4a-diaza-4-bora-s-indacen-3-yl)propionyl; chemiluminescent groups such as luciferin and luminol; and heavy metal ions such as lanthanoid metal ions and radium ions, and
• groups bound to solid-phase carriers such as glass beads, glass beds, microtiter plates, agarose beads, agarose beds, polystyrene beads, polystyrene beds, nylon beads and nylon beds.
• the probe When a probe is prepared by introducing a labeling group or the like selected from the group consisting of (1) to (5) above into the compound of the present invention in accordance with a method described in the above documents or the like, the probe can be used as a chemical probe for identification of labeled proteins useful for searching for novel drug targets, for example.
• TFA Trifluoroacetic acid
• EDC.HC1 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride
• pTLC Preparative thin-layer chromatography
• LC-MS Liquid chromatography-mass spectrometry
• PyBOP Benzotriazol-1-yloxytris(pyrrolidino)phosphonium hexafluorophosphate
• Pd2 DBA3 Tris(dibenzylideneacetone)dipalladium
• room temperature in the following Examples and Preparation Examples typically refers to about 10° C. to about 35° C. “%” indicates wt % unless otherwise specified.
• 2-Bromofluorobenzene (1.85 g) was dissolved in toluene (30 ml), and tetrahydrofuran (10 ml) was added.
• n-Butyllithium (2.73 M; 3.68 ml) was added dropwise at ⁇ 78° C.
• 2-Fluorophenyllithium was prepared by stirring at the same temperature for one hour.
• a boron trifluoride-ether complex (1.26 ml) was added to a solution of 3,3a,4,5-tetrahydro-7H-pyrano[3,4-c]isoxazole (630 mg) in toluene (70 nil) at ⁇ 78° C.
• Zinc (11.6 g) was added to a solution of ( ⁇ )-(3aR*,7aS*)-7a-(2-fluorophenyl)hexahydropyrano[3,4-c]isoxazole (3.95 g) in acetic acid (78.4 ml), and the mixture was stirred at room temperature overnight. The insoluble matter was removed by filtration through celite, and the solvent was evaporated under reduced pressure. An ice-cooled 0.5 N sodium hydroxide solution was added to the residue. The aqueous layer was extracted with ethyl acetate and a mixed solution of ethyl acetate and tetrahydrofuran. The organic layers were combined and washed with brine and then dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (3.45 g).
• Fluorenylmethyloxycarbonyl isothiocyanate (938 mg) was added to a solution of ( ⁇ )-[(3S*,4R*)-3-amino-3-(2-fluorophenyl)tetrahydropyran-4-yl]methanol (683 mg) in dichloromethane (20 ml). The mixture was stirred at room temperature overnight, and then the solvent was evaporated under reduced pressure at room temperature or lower. The residue was purified by silica gel column chromatography to obtain the title compound (1.57 g).
• Benzoyl isothiocyanate (642 ⁇ l) was added to a solution of the compound obtained in the previous step (1.26 g) in dichloromethane (32.3 ml) at room temperature, and the mixture was stirred for two hours and 30 minutes. The reaction solution was concentrated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (1.67 g).
• the compound obtained in the previous step (5.81 g) was dissolved in a mixed solution of formic acid (30 ml) and water (10 ml) at room temperature, followed by stirring for six hours. Hydroxylamine sulfate (4.42 g) and sodium acetate (4.41 g) were added to the reaction solution, and the mixture was stirred at room temperature for 14 hours. Saturated aqueous sodium chloride was added to the reaction solution, followed by extraction with ethyl acetate. The organic layer was washed with brine, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (2.95 g).
• the mixture was sequentially extracted with a mixed solution of hexane and ethyl acetate (1:1), ethyl acetate and diethyl ether.
• the organic layer was dried over anhydrous magnesium sulfate.
• the drying agent was filtered off and the filtrate was concentrated under reduced pressure to obtain the title compound (2.60 g).
• n-Butyllithium (58.2 mL, 2.64 M solution in hexane) was added dropwise to a suspension of trimethylsulfonium iodide (32.4 g) in tetrahydrofuran (400 mL) in a nitrogen atmosphere at ⁇ 20° C.
• the reaction solution was stirred at the same temperature for 30 minutes.
• tert-Butyldimethylsilyl (R)-( ⁇ )-glycidyl ether (10 g) was added dropwise to the reaction solution at the same temperature.
• the reaction solution was stirred for three hours with gradual heating to room temperature.
• Aqueous ammonium chloride and ethyl acetate were added to the reaction solution, and the organic layer was separated.
• Tetrabutylammonium fluoride (55 mL, 1 M solution in tetrahydrofuran) was added dropwise to a solution of the compound obtained in Preparation Example 8-(2) (11.3 g) in tetrahydrofuran (220 mL), and the mixture was stirred at room temperature for two hours. Saturated aqueous sodium chloride and ethyl acetate were added to the reaction solution, and the organic layer was separated. Ethyl acetate was added to the aqueous layer, and the organic layer was separated again. The combined organic layers were dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (4.15 g).
• Lithium aluminum hydride (826 mg) was added to a solution of the compound obtained in Preparation Example 8-(4) (4.77 g) in tetrahydrofuran (100 mL) in a nitrogen atmosphere. The mixture was stirred at the same temperature for one hour. Methanol was added dropwise to the reaction solution, and then water was added dropwise. The insoluble matter in the reaction mixture was separated by filtration through celite and washed with ethyl acetate. Saturated aqueous sodium chloride was added to the filtrate, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (2.13 g).
• Benzoyl isocyanate (667 mg) was added to a solution of the compound obtained in Preparation Example 8-(9) (1 g) in dichloromethane (25 mL), and the mixture was stirred at room temperature for 15 hours. The reaction solution was concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (1.45 g).
• 1,8-Diazabicyclo[5,4,0]-7-undecene (312 ⁇ L) was added to a solution of the compound obtained in Preparation Example 8-(12) (370 mg) in methanol (13 mL), and the mixture was heated under reflux for eight hours. The reaction solution was returned to room temperature and concentrated under reduced pressure. The residue was purified by NH-silica gel column chromatography to obtain the title compound (262 mg).
• Triethylamine (52.1 mL) was added to the reaction solution at the same temperature. The reaction solution was stirred for one hour while gradually returning to room temperature. Aqueous ammonium chloride was added to the reaction solution, and the organic layer was separated. The organic layer was washed with saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate. The organic layer was filtered through a silica pad and the filtrate was concentrated. Tetrahydrofuran (500 mL) was added to the residue. The reaction solution was cooled to ⁇ 78° C. in a nitrogen atmosphere. Vinylmagnesium chloride (148 mL, 1.38 M solution in tetrahydrofuran) was added dropwise to the reaction solution at the same temperature.
• reaction solution was heated to room temperature with stirring over six hours. Aqueous ammonium chloride and ethyl acetate were added to the reaction solution, and the organic layer was separated. The organic layer was washed with saturated aqueous sodium chloride and dried over anhydrous magnesium sulfate. The organic layer was concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (10.03 g).
• Tetrabutylammonium fluoride (7.47 mL, 1 M solution in tetrahydrofuran) was added dropwise to a solution of the compound obtained in Preparation Example 1042) (1.3 g) in tetrahydrofuran (25 mL) under ice-cooling. The reaction solution was stirred at the same temperature for 10 minutes. The reaction solution was returned to room temperature and further stirred for five hours. Saturated aqueous sodium chloride and ethyl acetate were added to the reaction solution, and the organic layer was separated. Ethyl acetate was added to the aqueous layer, and the organic layer was separated. The organic layers were combined and dried over anhydrous magnesium sulfate. The organic layer was concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (500 mg).
• a boron trifluoride-diethyl ether complex (91.7 ⁇ L) was added dropwise to a suspension of 2-methylpyrazine-5-carboxylic acid (1 g) and tert-butyl 2,2,2-trichloroacetimidate (4.75 g) in tetrahydrofuran (20 mL) under ice-cooling.
• the reaction solution was heated to room temperature and stirred for two hours.
• a saturated sodium chloride solution and ethyl acetate were added to the reaction solution, and the organic layer was separated.
• the organic layer was dried over anhydrous magnesium sulfate, and the insoluble matter was separated by filtration.
• the filtrate was concentrated and purified by silica gel column chromatography to obtain the title compound (1.4 g).
• Trifluoroacetic acid (1 mL) was added to a solution of t-butyl 5-difluoromethylpyrazine-2-carboxylate (175 mg) in dichloromethane (1 mL), and the mixture was stirred at room temperature for five hours. Ether and 5 N sodium hydroxide were added to the reaction solution. The aqueous layer was separated and made acidic with 5 N hydrochloric acid. Ethyl acetate was added to the aqueous layer, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate, and the insoluble matter was separated by filtration. The filtrate was concentrated to obtain the title compound (100 mg).
• Zinc powder (4.36 g) was added to a solution of (3aR,5R,7aS)-5-benzyloxymethyl-7a-(2-fluorophenyl)hexahydropyrano[3,4-c]isoxazole (2.29 g) in acetic acid (50 ml), and the mixture was stirred at room temperature overnight. The insoluble matter was removed by filtration through celite, and the solvent was evaporated under reduced pressure. Ice was added to the residue, followed by neutralization with a 5 N sodium hydroxide solution. The aqueous layer was extracted with dichloromethane, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (2.08 g).
• Benzoyl isothiocyanate (893 ⁇ l) was added dropwise to a solution of [(2R,4R,5S)-5-amino-2-benzyloxymethyl-5-(2-fluorophenyl)tetrahydropyran-4-yl]methanol (2.08 g) in dichloromethane (30 ml). The reaction solution was stirred at room temperature for three hours, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography. Several drops of concentrated hydrochloric acid were added to a solution of the resulting intermediate in methanol (40 ml), and the mixture was heated under reflux for five hours. The reaction solution was returned to room temperature, and then the solvent was evaporated under reduced pressure.
• Triethylamine (1 ml) was added to a solution of [(4aR,6R,8aS)-2-amino-8a-(2-fluoro-5-nitrophenyl)-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-6-yl]methanol (1.0 g) in THF (100 ml). Then, di-tert-butyl dicarbonate (1.28 g) was added and the mixture was stirred at room temperature overnight. The solvent was evaporated under reduced pressure and the residue was purified by NH-silica gel column chromatography to obtain the title compound (1.05 g).
• Iron powder (121 mg) and a saturated ammonium chloride solution (1 ml) were added to a solution of tert-butyl [(4aR,6R,8aS)-8a-(2-fluoro-5-nitrophenyl)-6-hydroxymethyl-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-yl]carbamate (120 mg) in ethanol (20 ml).
• the reaction solution was heated under reflux for 40 minutes and then cooled to room temperature.
• the insoluble matter was filtered off through celite, and the filtrate was evaporated under reduced pressure.
• the residue was purified by NH-silica gel column chromatography to obtain the title compound (67 mg).
• Benzoyl isothiocyanate (156 ⁇ l) was added to a solution of ( ⁇ )-[(2R*,4R*,5S*)-5-amino-5-(5-bromo-2-fluorophenyl)-2-trifluoromethyltetrahydropyran-4-yl]methanol (390 mg) in dichloromethane (10 ml), and the mixture was stirred at room temperature overnight. The solvent was evaporated under reduced pressure and the residue was purified by silica gel chromatography. The resulting intermediate was dissolved in methanol (50 ml). Concentrated hydrochloric acid (1.0 ml) was added and the mixture was heated under reflux for five hours.
• Zinc powder (4.24 g) was added to a solution of (3aR,5R,7aS)-5-benzyloxymethyl-7a-(5-bromo-2-fluorophenyl)hexahydropyrano[3,4-c]isoxazole (2.74 g) in acetic acid (40 ml). After stiffing at room temperature overnight, the insoluble matter was removed by filtration through celite. The solvent was evaporated under reduced pressure and ice was added to the residue, followed by neutralization with a 5 N sodium hydroxide solution. The aqueous layer was extracted with dichloromethane, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (2.22 g).
• Triethylamine (5.0 ml) and di-tert-butyl dicarbonate (2.06 g) were added and the mixture was stirred at room temperature for six hours.
• the solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (1.24 g).
• 1,3-Dibromo-4-fluorobenzene (837 mg) was dissolved in a toluene-THF (10:1) mixture (15 ml). The mixture was cooled to ⁇ 78° C. and n-butyllithium (2.64 M, 1.19 ml) was added dropwise. After stirring at the same temperature for one hour, a solution of ( ⁇ )-3,3a,4,5-tetrahydro-7H-pyrano[3,4-c]isoxazole obtained in Preparation Example 1-(2) (200 mg) in toluene-THF (10:1) (5.0 ml) and a boron trifluoride-diethyl ether complex (394 pd) were added dropwise at the same time.
• Zinc powder (759 mg) was added to a solution of ( ⁇ )-(3aR*,7aS*)-7a-(5-bromo-2-fluorophenyl)hexahydropyrano[3,4-c]isoxazole (350 mg) in acetic acid (6.73 ml). After stirring at room temperature overnight, the insoluble matter was removed by filtration through celite. The solvent was evaporated under reduced pressure, and the resulting residue was neutralized with 5 N sodium hydroxide in an ice bath. The aqueous layer was extracted with ethyl acetate, and the organic layer was washed with brine. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to obtain an intermediate (300 mg).
• Benzoyl isothiocyanate 1334 was added to a solution of the resulting intermediate in dichloromethane (10 ml), and the mixture was stirred at room temperature overnight. The solvent was evaporated under reduced pressure. Methanol (10 ml) and concentrated hydrochloric acid (several drops) were added to the resulting residue, and the mixture was heated under reflux for two hours. The reaction solution was returned to room temperature, and the solvent was evaporated under reduced pressure. The resulting residue was neutralized with a sodium bicarbonate solution, and the aqueous layer was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by NH-silica gel column chromatography to obtain the title compound (211 mg).
• Zinc powder (1.58 g) was added to a solution of ( ⁇ )-(3aR*,7aS*)-7a-(4-bromothiophen-2-yl)hexahydropyrano[3,4-c]isoxazole (700 mg) in acetic acid (20 ml). After stirring at room temperature overnight, the insoluble matter was removed by filtration through celite. The solvent was evaporated under reduced pressure, and the residue was neutralized with ice and 5 N sodium hydroxide. The aqueous layer was extracted with ethyl acetate, and the organic layer was washed with brine. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure.
• Zinc powder (133 mg) and ammonium formate (320 mg) were added to a solution of ( ⁇ )-N,N-di(tert-butyloxycarbonyl)-[(4aR*,8aR*)-8a-(4-azidothiophen-2-yl)-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-yl]amine (503 mg) in methanol (76.2 ml). The mixture was stirred at room temperature overnight, and then the solvent was evaporated under reduced pressure at room temperature or lower. Water was added to the residue, and the aqueous layer was extracted with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (325 mg).
• Zinc powder (2.01 g) was added to a solution of ( ⁇ )-(3aR*,7aS*)-7a-(2,2-difluoro-benzo[1,3]dioxol-4-yl)-hexahydropyrano[3,4-c]isoxazole (875 mg) in acetic acid (30 ml), and the mixture was stirred at room temperature overnight. The insoluble matter was removed by filtration through celite, and the solvent was evaporated under reduced pressure. Ice was added to the residue, followed by neutralization with a 5 N sodium hydroxide solution. The aqueous layer was extracted with dichloromethane, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (661 mg).
• Benzoyl isothiocyanate (372 ⁇ l) was added to a solution of ( ⁇ )-[(3S*,4R*)-3-amino-3-(2,2-difluorobenzo[1,3]dioxol-4-yl)tetrahydropyran-4-yl]methanol (661 mg) in dichloromethane (9.53 ml). The mixture was stirred at room temperature for three hours, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography. The resulting intermediate was dissolved in methanol (20 ml). Concentrated hydrochloric acid (five drops) was added and the mixture was heated under reflux for five hours.
• the reaction solution was cooled to room temperature, and the solvent was evaporated under reduced pressure.
• the residue was dissolved in methanol (20 ml) and DBU (700 ⁇ l) was added, followed by heating under reflux for five hours.
• the reaction solution was cooled to room temperature, and the solvent was evaporated under reduced pressure.
• the residue was purified by NH-silica gel column chromatography to obtain the title compound (350 mg).
• Fuming nitric acid (7.60 ⁇ l) was added to a solution ( ⁇ )-(4aR*,8aS*)-8a-(2,2-difluorobenzo[1,3]dioxol-4-yl)-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-ylamine (50.0 mg) in TFA (1.0 ml) in an ice bath. Then, concentrated sulfuric acid (0.5 ml) was added dropwise. After stirring at the same temperature for one hour, the reaction mixture was poured into ice to terminate the reaction. The mixture was neutralized with 5 N hydroxide.
• Iron powder (7.09 mg) and a saturated ammonium chloride solution (1.0 ml) were added to a solution of tert-butyl ( ⁇ )-[(4aR*,8aS*)-8a-(2,2-difluoro-6-nitrobenzo[1,3]dioxol-4-yl)-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-yl]carbamate (60.0 mg) in ethanol (20 ml), and the mixture was heated under reflux for 30 minutes. The reaction solution was returned to room temperature and the insoluble matter was removed by filtration through celite. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (50.0 mg).
• Potassium trimethylsilanolate (14.8 mg) was added to a solution of the compound obtained in the previous step (19.7 mg) in tetrahydrofuran (1 ml), and the mixture was stirred at room temperature for one hour. The reaction solution was concentrated under reduced pressure. Water and ethyl acetate were added to the residue, and the aqueous layer was separated. 5 M hydrochloric acid was added to the aqueous layer, followed by extraction with chloroform. The organic layer was concentrated under reduced pressure to obtain the title compound (13.2 mg).
• Oxalyl chloride (140 ⁇ l) was added to a suspension of 5-cyanopyridine-2-carboxylic acid (50 mg) in dichloromethane (2 ml) under ice-cooling. Tetrahydrofuran (4 ml) was further added at the same temperature, and the solid was completely dissolved. After confirming completion of foaming, the solvent was evaporated under reduced pressure. Tetrahydrofuran (5 ml) was added to the residue to obtain an acid chloride solution.
• the aqueous layer was extracted with ethyl acetate, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure to obtain an amide compound.
• the resulting amide compound was dissolved in dichloromethane (4 ml), and trifluoroacetic acid (1 ml) was added. The mixture was stirred at room temperature for three hours, and then ice was added.
• the aqueous layer was neutralized with a sodium bicarbonate solution, followed by extraction with ethyl acetate.
• the organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure.
• the residue was purified by NH-silica gel column chromatography to obtain the title compound (8.0 mg).
• Example 4 Compound name: N-[3-((4aR*,8aS*)-2-amino- 4,4,5,6-tetrahydro-7-oxa-3-thia-1-azanaphthalen- 8a-yl)-4-trifluoromethoxyphenyl]-5-cyanopyridine- 2-carboxamide ESI-MS m/z 478 [M + + H]
• Example 5 Compound name: N-[3-((8S*,8aS*)-2-amino- 4,4a,5,6-tetrahydro-7-oxa-3-thia-1-azanaphthalen- 8a-yl)-4-trifluoromethoxyphenyl]-5- chloropyridine-2-carboxamide ESI-MS m/z 487 [M + + H]
• Example 6 Compound name: N-[3-((4aR*,6S*,8aS*)-2-amino- 6-methyl-4,4a,5,6-tetrahydro-7-oxa-3-thia-1- azanaphthalen-8a-yl)-4-fluorophenyl]-5- chloropyridine-2-carboxamide ESI-MS m/z 435 [M + + H]
• Example 7 Compound name: N-[3-((4aR*,6S*,8aS*)-2-amino- 6-methyl-4,4a,5,6-tetrahydro-7-oxa-3-thia-1- azanaphthalen-8a-yl)-4-fluorophenyl]-5- cyanopyridine-2-carboxamide ESI-MS m/z 426 [M + + H]
• Example 8 Compound name: N-[3-((4aR*,6S*,8aS*)-2-amino-
• Example 32-(1) The compound obtained in Example 32-(1) was purified by CHIRALPAKTM IA (mobile phase: ethanol, flow rate: 10 ml/min), and the fraction with a retention time of 10.8 to 13.5 minutes was collected to obtain the title compound. The same operation was repeated to obtain the title compound (52 mg; >99% ee) from the raw material (130 mg).
• Examples 33 to 34 were synthesized according to Example 2 using the corresponding carboxylic acids and the corresponding aniline intermediates in Preparation Examples, as shown in the following Table 5.
• Example 33 Compound name: N-[3-((4aR,6R,8aS)-2-amino-6- hydroxymethyl-4,4a,5,6-tetrahydro-7-oxa-3-thia- 1-azanaphthalen-8a-yl)-4-fluorophenyl]-5- chloropyridine-2-carboxamide ESI-MS m/z 451 [M + + H]
• Example 34 Compound name: N-[3-((4aR,6R,8aS)-2-amino-6- hydroxymethyl-4,4a,5,6-tetrahydro-7-oxa-3-thia- 1-azanaphthalen-8a-yl)-4-fluorophenyl]-5- cyanopyridine-2-carboxamide ESI-MS m/z 442 [M + + H]
• Example 36 Compound name: N-[3-((4aR*,6R*,8aS*)-2- amino-6-trifluoromethyl-4,4a,5,6-tetrahydro-7- oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-difluoromethoxypyrazine-2- carboxamide
• Example 37 Compound name: N-[3-((4aR*,6R*,8aS*)-2- amino-6-trifluoromethyl-4,4a,5,6-tetrahydro-7- oxa-3-thia-1-azanaphthlen-8a-yl)-4- fluorophenyl]-5-fluoropyriidne-2-carboxamide ESI-MS m/z 473 [M + + H]
• Example 38 Compound name: N-[3-((4aR*,6R*,8aS*)-2- amino-6-trifluoromethyl-4,4a,5,6-tetrahydro-7- oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-pyridine-2-carboxamide ESI-MS m/z 455 [M + + H]
• Example 39 Compound name: N-[3-((4aR*,6R*,8aS*)
• Example 43 Compound name: N-[3-((4aR*,6R*,8aS*)-2- amino-6-trifluoromethyl-4,4a,5,6-tetrahydro-7- oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-difluoromethylpyrazine-2- carboxamide
• Example 44 Compound name: N-[3-((4aR,6R,8aS)-2-amino-6- fluoromethyl-4,4a,5,6-tetrahydro-7-oxa-3-thia-1- azanaphthalen-8a-yl)-4-fluorophenyl]-5- cyanopyridine-2-carboxamide ESI-MS m/z 444 [M + + H]
• Example 45 Compound name: N-[3-((4aR,6R,8aS)-2-amino-6- fluoromethyl-4,4a,5,6-tetrahydro-7-oxa-3-thia-1- azanaphthalen-8a-yl)-4-fluorophenyl]-5- chloropyridine-2-carboxamide ESI-MS m/z 453 [M + + H]
• Example 46 Compound name: N-[3-((4aR,6R,8aS)-2-amino-6- fluor
• Example 48 Compound name: N-[3-((4aR,6R,8aS)-2-amino- 6-fluoromethyl-4,4a,5,6-tetrahydro-7-oxa-3-thia- 1-azanaphthalen-8a-yl)-4-fluorophenyl]-5- difluoromethylpyrazine-2-carboxamide
• Example 50 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-bromopyridine-2-carboxamide
• Example 51 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-3,5-difluoropyridine-2-carboxamide
• Example 52 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-3,5-dichloropyridine-2-carboxamide
• Example 53 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-fluoropyridine-2-carboxamide
• Example 54 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-3,5-dibromopyridine-2-carboxamide EIS-MS m/z 545 [M + + H]
• Example 55 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-trifluoromethylpyridine-2-carboxamide
• Example 56 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-difluoromethylpyridine-2-carboxamide
• Example 57 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-difluoromethylpyrazine-2-carboxamide
• Example 58 Compound name: N-[3-((4aR*,8aS*)-2-amino-4,4a,5,6- tetrahydro-7-oxa-3-thia-1-azanaphthalen-8a-yl)-4- fluorophenyl]-5-difluoromethoxypyridine-2-carboxamide
• 2-Fluoropyridine-3-boronic acid (51.1 mg), tetrakis(triphenylphosphine)palladium (19.1 mg) and a 1 N sodium carbonate solution (363 ⁇ l) were added to a solution of N,N-di(tert-butyloxycarbonyl)-[(4aR,6R,8aS)-8a-(5-bromo-2-fluorophenyl)-6-fluoromethyl-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-yl]amine (95 mg) in DMF (6.79 ml). After replacement with nitrogen, the mixture was stirred at 85° C. for two hours.
• reaction solution was cooled to room temperature and diluted with water.
• aqueous layer was extracted with ethyl acetate.
• the organic layer was washed with water and brine and dried over anhydrous magnesium sulfate.
• the solvent was evaporated under reduced pressure and the residue was purified by NH-silica gel column chromatography to obtain the title compound (12.7 mg).
• Example 62 Compound name: ( ⁇ )-(4aR*,8aS*)-8a-(2-fluoro-5- pyrimidin-5-ylphenyl)-4,4a,5,6,8,8a-hexahydro-7-oxa-3- thia-1-azanaphthalen-2-ylamine ESI-MS m/z 345 [M + + H]
• Example 63 Compound name: ( ⁇ )-(4aR*,8aS*)-8a-[5-(5-chloropyridin- 3-yl)-2-fluorophenyl]-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia- 1-azanaphthalen-2-ylamine ESI-MS m/z 378 [M + + H]
• 2-Fluoropyridine-3-boronic acid (44.0 mg), tetrakis(triphenylphosphine)palladium (18.0 mg) and a 1 N sodium carbonate solution (312 ⁇ l) were added to a solution of N,N-di-(tert-butyloxycarbonyl)-[(4aR,6R,8aS)-8a-(5-bromo-2-fluorophenyl)-6-benzyloxymethyl-4,4a,5,6,8,8a-hexahydro-7-oxa-3-thia-1-azanaphthalen-2-yl]amine (95 mg) in DMF (6.79 ml). After replacement with nitrogen, the mixture was stirred at 85° C. for seven hours.
• the solvent was evaporated under reduced pressure and the residue was purified by NH-pTLC to obtain an intermediate.
• the resulting intermediate was dissolved in dichloromethane (3.0 ml) and TFA (1.0 ml) was added. After stirring at room temperature for four hours, the reaction solution was diluted with water and neutralized with a sodium bicarbonate solution. The aqueous layer was extracted with dichloromethane, and the organic layer was dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by NH-pTLC to obtain the title compound.
• Example 74-(1) The compound obtained in Example 74-(1) (2.73 g) was dissolved in 1,4-dioxane (40 mL). 1-Ethoxyvinyltri-n-butyltin (2.42 mL), cesium fluoride (1.55 g) and bis(tri-t-butylphosphine)palladium (118 mg) were sequentially added to the solution, and the mixture was stirred in a nitrogen atmosphere at 100° C. After 1.5 hours, the reaction solution was left to cool. The reaction mixture was filtered through celite and washed with ethyl acetate. The filtrate was concentrated under reduced pressure. Ethyl acetate and 1 N KHSO4 were added to the residue, and the organic layer was separated.
• Example 74-(2) The compound obtained in Example 74-(2) (207 mg) was dissolved in N,N-dimethylformamide dimethyl acetal (2.3 mL), and then the solution was stirred in a nitrogen atmosphere at 110° C. After about 14 hours, the reaction solution was left to cool and then concentrated under reduced pressure. Ethanol (3 mL) was added to the residue and then hydrazine hydrate (78 ⁇ L) was added, followed by stirring at room temperature. After about three days, the reaction solution was concentrated under reduced pressure. Ethyl acetate and a saturated sodium bicarbonate solution were added to the residue, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure. The residue was subjected to silica gel chromatography to obtain the title compound (38 mg).
• Example 74-(3) The compound obtained in Example 74-(3) (38 mg) was dissolved in dichloromethane (2 mL), and then trifluoroacetic acid (0.4 mL) was added, followed by stirring at room temperature. After three hours, the reaction solution was concentrated under reduced pressure. Chloroform and a saturated sodium bicarbonate solution were added to the residue, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography to obtain the title compound (18 mg).
• Example 74-(1) The compound obtained in Example 74-(1) (1.33 g) was dissolved in THF (28 mL). 2-Fluoropyridine-3-boronic acid (955 mg), potassium fluoride (558 mg), Pd2 DBA3 (200 mg) and Pd(t-Bu 3 P) 2 (220 mg) were added to the solution, and the mixture was stirred in a nitrogen atmosphere at room temperature overnight.
• Example 76-(1) The compound obtained in Example 76-(1) (67 mg) was dissolved in dichloromethane (2 mL), and then TFA (0.5 mL) was added. After two hours, the reaction solution was concentrated under reduced pressure. Chloroform, a 1 N sodium hydroxide solution and a saturated sodium bicarbonate solution were added to the residue, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated. The residue was subjected to silica gel chromatography to obtain the title compound (30 mg).
• Example 78-(1) The compound obtained in Example 78-(1) (114 mg) was dissolved in dichloromethane (3 mL), and then TFA (1 mL) was added, followed by stirring at room temperature. After three hours, the reaction solution was concentrated under reduced pressure. Chloroform and a saturated sodium bicarbonate solution were added to the residue, and the organic layer was separated. The organic layer was dried over anhydrous magnesium sulfate. The drying agent was removed by filtration and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography to obtain the title compound (61 mg).
• Example 76-(1) The compound synthesized in Example 76-(1) (229 mg) was dissolved in 1,4-dioxane (4 mL). 3-(Tributylstannyl)pyridazine (215 mg), cesium fluoride (130 mg) and bis(tri-t-butylphosphine)palladium (10 mg) were sequentially added to the solution, and the mixture was stirred in a nitrogen atmosphere at 100° C. After two hours, the reaction solution was left to cool. The reaction mixture was filtered through celite and washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was subjected to silica gel chromatography to obtain the title compound (116 mg).

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