Bis-vinylic tellurides, 1-tellurodienes, 1-telluroenynes and vinyl thienyl tellurides react with higher order cyanocuprates giving the corresponding higher order vinyl cyanocuprates with retention of the olefine geometry.
Influence of the gegenion in the transmetalation reaction of vinylic tellurides with higher order cyanocuprates
作者:André Chieffi、João V. Comasseto
DOI:10.1016/s0040-4039(00)73112-1
日期:1994.6
Dilithium cyanocuprates R2LCu(CN)Li2 (L=2-Th, Me) react with vinylictellurides of Z configuration, RCHCHTeR1 to give higherordervinyliccyanocuprates, [(RCHCH)LCu(CN)Li2]. By changing the gegenion from lithium to magnesium [R2LCu(CN)LiMgBr or R2LCu(CN)(MgBr)2] the reaction gives cross - coupling products of Z configuration, RCHCHR2 in good yields.