Improved Yields with Added Copper(I) Salts in Carbonylative Stille Couplings of Sterically Hindered Vinylstannanes
作者:R. D. Mazzola,、Sören Giese、Chantel L. Benson、F. G. West
DOI:10.1021/jo034788q
日期:2004.1.1
Stille coupling under standard carbonylative conditions proceeds in poor yield when using hindered alkenylstannane and enol triflate partners. The inclusion of 35 mol % CuI or CuBr significantly improves the efficiency of the coupling, providing a variety of complex 1,4-dien-3-ones in good to excellent yield.