Preparation of 4,4'-diphenoxybenzophenone

Details Preparation of 4,4'-diphenoxybenzophenone Preparation of 4,4'-diphenoxybenzophenone

1988-01-05

1989-06-27

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568319, C07C 4546

Patent

active

048431796

ABSTRACT:
A method of preparing 4,4'-diphenoxybenzophenone, comprising reacting diphenyl ether and carbon dioxide in the presence of a Friedel-Crafts catalyst and a promoting agent, preferably selected from the group consisting of phosphoryl chloride, phosphorus pentoxide, tetrachlorosilane, methyltrichlorosilane, dimethyldichlorosilane, titanium tetrachloride, zirconium tetrachloride, zirconium oxyhalide, and phosphorus pentachloride. In a preferred embodiment, the Friedel-Crafts catalyst is aluminum chloride and the promoting agent is phosphoryl chloride.

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