Patent ID: 8642805

Claim:
A method of producing a phthaloyl dichloride compound, the method comprising: providing a compound represented by the following formula (1) and a compound represented by the following formula (2); and bringing the compound represented by the following formula (1) and the compound represented by the following formula (2) into reaction, so as to form a compound represented by the following formula (3), in the presence of at least one catalyst selected from the group consisting of zirconium tetrachloride, dichlorooxo zirconium, zirconium hydroxide and hafnium tetrachloride; wherein, in formulae, X represents a halogen atom, a nitro group, a methyl group, or a methoxy group; when the X is plural, Xs may be the same or different from each other; n represents an integer of from 0 to 2; R represents a halogen atom, a chlorocarbonyl group, an alkyl group having 1 to 3 carbon atoms, or a halogen-substituted alkyl group having 1 to 3 carbon atoms; when the R is plural, Rs may be the same or different from each other; and m represents an integer of from 0 to 2.