The use of chlorosubstituted cyclopropenium cations for the synthesis of substituted cyclopropenones.

Abstract

2-chlorocyclopropenyl cations (3) which are readily prepared from the corresponding 2-chlorocyclopropenes (4) by reaction with triphenylcarbenium tetrafluoroborate are converted to cyclopropenones (7) in high yield upon treatment with aqueous sodium bicarbonate. © 1993.