Vinylborane and vinyichalcogenide mediated syntheses of tri- and tetrasubstituted olefins from 1-alkynes

Article abstract of DOI:10.1016/S0040-4039(98)01938-8

The title olefins have been prepared with high regio- and stereocontrol from 1-alkynes through vinyl boranes 1 vinyl chalcogenides; the reaction sequences involved protonolysis or transmetallation - alkylation of the boranes followed by an Ni(0) catalyzed coupling reaction.