Patent ID: 8586761

Claim:
A production method of a compound represented by formula (7): wherein ring A represents a benzene ring or a 6-membered aromatic heterocycle; R 1 represents a hydrogen atom, a C 1-6 alkyl group, a halogen atom, a nitro group, an amino group, a mono-C 1-6 alkylamino group, or a di-C 1-6 alkylamino group; and at least one of R 2 , R 3 , and R 4 represents a methoxy group, and the rest each represents a hydrogen atom, a C 1-6 alkyl group, a halogen atom, a nitro group, an amino group, a mono-C 1-6 alkylamino group, or a di-C 1-6 alkylamino group, the method comprising reacting a compound represented by formula (3): wherein ring A and R 1 , R 2 , R 3 , and R 4 are the same as defined above; and R5 represents a hydrogen atom or an electron-withdrawing group selected from the group consisting of a halogen atom, a nitro group, a trifluoromethyl group, a trichloromethyl group, a cyano group, an acetyl group, a sulfonic acid group and an alkylsulfonic acid group with a compound represented by formula (4): wherein R 6 represents an alkyl group, under heating at 150° C. or higher or in the presence of a boric acid ester to provide a compound represented by formula (5): wherein ring A and R 1 , R 2 , R 3 , R 4 , and R 6 are the same as defined above; and reacting the resultant compound with N,N-diisopropylethylenediamine in the presence of toluene.