the corresponding trisubstitutedalkenes in which the tosyl group has been selectively substituted by an aryl or an alkyl group with retention of configuration. Finally, the cross coupling reaction of these vinyl selenides with methylmagnesium bromide, in the presence of a nickel catalyst, occurs with retention of configuration and affords the selenium free trisubstitutedalkenes.
(E)-α-Selanylvinylstannanes as Convenient Precursors for Stereoselective Synthesis of Trisubstituted Alkenes
作者:Xian Huang、Yun Ma
DOI:10.1055/s-1997-1203
日期:1997.4
Based on the different reactivities of selanyl and tributylstannyl groups, (E)-α-selanylvinylstannanes can undergo sequential cross coupling reaction in the presence of transition metal complexes to form two carbon-carbon bonds in the same olefinic carbon leading to trisubstituted alkenes stereoselectively.