Highly stereoselective syntheses of conjugated , - and , -dienes, -enynes and -1,2,3-butatriened via alkenylborane derivatives
作者:Ei-ichi Negishi、Takao Yoshida、Akiva Abramovitch、George Lew、Robert M. Williams
DOI:10.1016/s0040-4020(01)90494-6
日期:——
A highly selective and potentially general methodology for the synthesis of conjugated E,E- and E,Z-dienes, E-enynes, and E-1,2,3-butatrienes via hydroboration of alkynes is reported. The observed stereoselectivity was > 98-99%.