Cu(I)-assisted carbon-carbon bond forming reactions of #gamma#,#gamma#-dialkoxyallylic zirconium species:a new verstile homoenoalte equivalent of rpopionate

摘要

In the presence of CuCN, reaction of #gamma#,#gamma#-dialkoxyallylci zirconium species 1 with acyl chloride or allylci phosphates proceeded at the #alpha#-position of 1 to give alkanoates 3 after aqueous work-up. The ketene dialkylacetal moiety in the coupling products 2 can be used for fuuther gobnd forming reaction with electorphiles such as nitrosobenzene, nitrostyrene or trichloroacetylisocyanate.