PROCESS FOR PRODUCING FLUORENE DERIVATIVE

摘要

Fluorenone is condensed with a phenol [e.g., 2−(C1−4 alkyl)phenol] in the presence of both of a thiol and an aqueous hydrochloric acid solution to produce a fluorene derivative {e.g., 9,9−bis[(C1−4 alkyl)hydroxyphenyl]fluorene}. The proportion (by weight) of the fluorenone to the thiol is about from 1/0.01 to 1/0.5. The proportion (by weight) of the thiol to the hydrochloric acid (HCl) contained in the aqueous hydrochloric acid solution is about from 1/0.1 to 1/3. The thiol may be a mercaptocarboxylic acid (ß−mercaptopropionic acid). Thus, a high−purity fluorene derivative having excellent transparency can be easily produced at low cost without using hydrogen chloride gas, which is difficult to handle.