The Mechanism of Double Olefination Using Titanium-Substituted Ylides
作者:Kelly A. Reynolds、M. G. Finn
DOI:10.1021/jo9610016
日期:1997.4.1
aldehydes is proposed to arise from the presence of a chloride leaving group on the metal. Isolated vinylphosphoniumcompounds may be deprotonated with phenyllithium to give thermally sensitive allenic phosphoranes, which have been characterized by low temperature multinuclear NMR. The reaction of allenic phosphoranes with aldehydes affords oxaphosphetane and betaine intermediates which appear to interconvert