Coupling of propargylsilanes with Fischer carbene chromium complexes: a new synthesis of conjugated dienes
作者:Paren P. Patel、Yixin Zhu、Lei Zhang、James W. Herndon
DOI:10.1016/j.jorganchem.2004.07.051
日期:2004.10
The reaction of propargylsilanes with Fischer carbene complexes has been examined. If the silane-containing carbon is secondary the predominant pathway involves formation of conjugated dienes through a 1,2-silicon shift process of the initially formed vinyl-carbene complex intermediate. If a primary propargylsilane is employed, the silicon does not shift and normal alkyne-Fischer carbene coupling processes are observed. The process is moderately stereoselective, resulting in the E enol ether and Z alkenylsilane. (C) 2004 Elsevier B.V. All rights reserved.