Dialkylboryl‐Substituted Triphenylphosphonium Ylides

Abstract

Transylidation of R1HC⊕P⊕Ph with RBCl in the molar ratio 2 : 1 furnished the novel crystalline ylides 1, which can also be described in terms of a mesomeric formulation 1b with BC bonding. Hitherto, transylidations have been carried out only with halides of the 4th—7th main group elements.