PROCESS FOR PRODUCING 3,4' DIHYDROXYBENZOPHENONE AS AN INTERMEDIATE FOR PRODUCING 3,4' DIACETOXYBENZOPHENONE.

摘要

A process for synthesizing 3,4'dihydroxybenzophenone by reacting meta- hydroxybenzoic acid and phenol in the presence of a Lewis acid, and a protonic acid. Upon completion of the reaction the Lewis and protonic acids are removed and then the reaction product of 3,4'dihydroxybenzophenone is contacted with water (at temperature not greater than 10°C) and ammonium hydroxide followed by filtration. Thereafter the filtered material can be reacted with an acetylating agent in the presence of inorganic acid and activated carbon to form 3,4' diacetoxybenzophenone.