A production method of a compound represented by formula: (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), comprising (a) reacting a compound represented by formula: (wherein ring A and R 1, R 2, R 3, and R 4 are the same as defined above) with a Lewis acid selected from TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide; or (b) reacting a compound represented by formula, (wherein ring A is the same as defined above, and R 1 and R 4 are each a hydrogen atom; R 2 and R 3 are each a methoxy group) with a Lewis acid selected from BF 3, TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide, with the proviso that when the Lewis acid is BF 3, an alkali metal bromide or an alkali metal iodide coexists, or (c) reacting a compound represented by formula, (wherein ring A and R 1 are the same as defined above; and R 2, R 3, and R 4 are a methoxy group) with a Lewis acid selected from BF 3, TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide, with the proviso that when the Lewis acid is BF 3, an alkali metal bromide or an alkali metal iodide coexists. 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 (a) reacting a compound represented by formula: (wherein ring A and R 1, R 2, R 3, and R 4 are the same as defined above) with a Lewis acid selected from TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide; or (b) reacting a compound represented by formula, (wherein ring A is the same as defined above, and R 1 and R 4 are each a hydrogen atom; R 2 and R 3 are each a methoxy group) with a Lewis acid selected from BF 3, TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide, with the proviso that when the Lewis acid is BF 3, an alkali metal bromide or an alkali metal iodide coexists, or (c) reacting a compound represented by formula, (wherein ring A and R 1 are the same as defined above; and R 2, R 3, and R 4 are a methoxy group) with a Lewis acid selected from BF 3, TiCl 4, and AlCl 3 in esteric, ketonic or amidic solvents selected from ethyl acetate, methyl acetate, butyl acetate, isobutyl acetate, acetone, 2-butanone, cyclohexanone, cyclopentanone, dimethylformamide, and dimethylacetamide, with the proviso that when the Lewis acid is BF 3, an alkali metal bromide or an alkali metal iodide coexists.