Vinylborane and vinylchalcogenide mediated synthesis of tri- and tetrasubstituted olefins from 1-alkynes
摘要:
The title olefins have been prepared with high regio- and stereocontrol from I-alkynes through vinyl boranes / vinyl chalcogenides; the reaction sequences involved protonolysis or transmetallation - alkylation of the boranes followed by an Ni(0) catalyzed coupling reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.