Synthesis of enynes and epoxyenynes by coupling: use of a new set of catalysts based on Pd–Ag salts
作者:Philippe Bertus、Patrick Pale
DOI:10.1016/s0022-328x(98)00681-0
日期:1998.9
The new couple of catalysts Pd(PPh3)(4) and AgI are very efficient for the coupling of vinyltriflates and terminal alkynes in the presence of a bulky amine in dimethylformamide at room temperature. Enynes and epoxyenynes are obtained in good to excellent yields. As illustrated with several examples, a wide variety of functional groups are well tolerated in the described conditions. Silver acetylides have been proposed as intermediate in this reaction. (C) 1998 Elsevier Science S.A. All rights reserved.