Dibenzophospholium salts and ylides. Preparation, properties, and Wittig olefin synthesis

Abstract

The spectral properties, hydrolyses, and Wittig olefin syntheses of P-benzoyl- and -alkoxycarbonyl-methylene-P-phenyldibenzophospholes and their salts are compared with those of the corresponding triphenylphosphonium derivatives. The mechanistic implications of the differences in stereoselectivity and of the similarity of the kinetics of the Wittig reaction for the two series are discussed.