METHOD FOR PRODUCING 4-(TRIBROMOMETHYLSULFONYL) BENZOPHENONE AND INTERMEDIATE FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for producing 4-(tribromomethylsulfonyl) benzophenone having the ability to generate radical by light irradiation, and to provide 4-(benzoyl)sulfonylacetic acid or a salt thereof useful as an intermediate for producing the above compound. SOLUTION: This method for producing 4-(tribromomethylsulfonyl) benzophenone of formula (2) comprises brominating 4-(benzoyl) phenylsulfonylacetic acid of the general formula (1) (wherein, M is H or an alkali metal atom) or a salt thereof.