Process for producing 4-carbonyloxyquinoline derivatives

1. A process for producing a 4-carbonyloxyquinoline derivative represented by general formula (1):

wherein

R 1 , R 2 , and R 3 each independently represent a hydrogen atom, a halogen atom, C 1-4 alkyl optionally substituted by a halogen atom(s), or C 1-4 alkoxy optionally substituted by a halogen atom(s), provided that R 1 , R 2 , and R 3 do not simultaneously represent a hydrogen atom,

R 4 and R 5 each independently represent a hydrogen atom or C 1-4 alkyl optionally substituted by a halogen atom(s), provided that R 4 and R 5 do not simultaneously represent a hydrogen atom, or R 4 and R 5 together represent —(CH 2 )m- wherein m is 3 or 4, and

R 6 , R 7 , R 8 , R 9 , and R 10 each independently represent a hydrogen atom, a halogen atom, C 1-8 alkyl optionally substituted by a halogen atom(s), C 1-8 alkoxy optionally substituted by a halogen atom(s), C 1-8 alkylthio optionally substituted by a halogen atom(s), C 2-4 alkenyloxy optionally substituted by a halogen atom(s), C 2-4 alkenylthio optionally substituted by a halogen atom(s), or C 2-4 alkynyloxy optionally substituted by a halogen atom(s),

or any two adjacent substituents of R 6 , R 7 , R 8 , R 9 , and R 10 together represent —O—(CH 2 )n-O— optionally substituted by one or more halogen atoms, wherein n is 1 or 2, and

R 11 represents C 1-8 alkyl optionally substituted by a halogen atom(s); C 3-6 cyclic alkyl optionally substituted by a halogen atom(s); C 2-4 alkenyl optionally substituted by a halogen atom(s); OR 12 wherein R 12 represents C 1-8 alkyl optionally substituted by a halogen atom(s), C 3-6 cyclic alkyl optionally substituted by a halogen atom(s), or C 2-4 alkenyl optionally substituted by a halogen atom(s); SR 13 wherein R 13 represents C 1-8 alkyl optionally substituted by a halogen atom(s), C 3-6 cyclic alkyl optionally substituted by a halogen atom(s), or C 2-4 alkenyl optionally substituted by a halogen atom(s), the process comprising

reacting a quinolone derivative represented by general formula (2):

wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , and R 10 are as defined in formula (1), with a halogenated compound represented by general formula (3):

[Chemical formula 3]

R 11 COX  (3)

wherein R 11 is as defined in formula (1); and X represents any one of fluorine, chlorine, bromine, and iodine,

or an acid anhydride represented by general formula (4):

wherein R 11 is as defined in formula (1),

in the presence of a phase transfer catalyst and a base,

wherein the phase transfer catalyst is tetrabutylammonium bromide

wherein the base is an aqueous hydroxide solution of an alkali metal or an alkaline earth metal or an aqueous carboxide solution of an alkali metal or an alkaline earth metal, and the base has a concentration of 40% or more by weight,

wherein the solvent is a mixed solvent comprising amides and one solvent selected from the group consisting of aromatic hydrocarbons, halogenated aromatic hydrocarbons, halogenated aliphatic hydrocarbons, aliphatic hydrocarbons, ethers and ketones.

2. The process according to claim 1 , wherein any one of R 1 , R 2 , and R 3 represents methyl, trifluoromethyl, or methoxy with the other two substituents representing a hydrogen atom; R 4 and R 5 each independently represent C 1-4 alkyl optionally substituted by a halogen atom(s); any one of R 6 , R 7 , R 8 , R 9 , and R 10 represents trifluoromethyl, methoxy, trifluoromethoxy, or 1,1,2,2-tetrafluoroethoxy with the other four substituents representing a hydrogen atom, or R 7 and R 8 together represent —O—(CF 2 ) 2 —O—; and R 11 represents OR 12 wherein R 12 represents C 1-4 alkyl.

3. The process according to claim 1 , wherein the base is an aqueous sodium hydroxide solution which has a concentration of 40% or more by weight.

4. The process according to claim 1 , wherein the solvent is a mixed solvent comprising toluene and dimethyl acetamide.