Z-Stereoselective semi-reduction of alkynes: modification of the Boland protocol
作者:Yasser M.A. Mohamed、Trond Vidar Hansen
DOI:10.1016/j.tet.2013.03.038
日期:2013.5
Highly Z-selective semi-reduction of alkynes has been achieved by adding TMSCl to a mixture of Zn(Cu/Ag), water, and methanol. The conjugated Z-alkenes have been prepared in high yields at ambient temperature. The formation of isomeric E-alkenes and over-reduction to alkanes were suppressed in our modified Boland reduction protocol. The methodology was extended to the preparation of Z-substituted stilbenes