Polyfluoroaryl organometallic compounds. Part IX. Reactions of polyfluoroaryl-lithiums with dimethyl carbonate. Octafluorofluoren-9-one

Abstract

Pentafluorophenyl-lithium reacts with dimethyl carbonate, under special conditions, to give a high yield of decafluorobenzophenone, but the corresponding reaction of o-bromotetrafluorophenyl-lithium is complicated by a novel exchange reaction, which is discussed. Octafluorofluoren-9-one is synthesised by reaction of 2,2′-dilithio-octafluorobiphenyl with dimethyl carbonate.