Patent ID: 7342138

Claim:
A process for producing an aromatic aldehyde compound represented by a general formula (3): (wherein R′ and n are as defined below), comprising: reacting a benzyl compound represented by a general formula (1): (wherein R represents a hydrogen atom or an alkyl group, n represents an integer of 1 to 6, and R′ may be the same or different and each independently represents a hydrogen atom, an alkyl group, a hydroxyl group, an alkoxy group, a hydroxyalkyl group, an alkoxyalkyl group, a haloalkyl group, a carboxyl group or a metal salt thereof, an alkoxycarbonyl group, a halogen atom, a nitro group, an amino group, an alkylamino group, an alkylcarbonylamino group, a cyano group, a formyl group, an alkylcarbonyl group, or a phenyl group which may have a substituent), with an oxy-compound of bromine represented by a general formula (2): MBrO m (2) (wherein M represents a hydrogen atom or a metal atom, and m represents an integer of 1 to 3) in the presence of an acid catalyst selected from the group consisting of carboxylic acids, organic acids, Lewis acids, sulfuric acid, and phosphoric acid.