A copper(I)-phosphine complex has been found to facilely promote the distannylation of alkynes with the aid of a base, where a catalytically generated Cu-Sn species serves as a key intermediate. The broad versatility of the copper catalysis has been demonstrated by the facile distannylation of unfunctionalized aliphatic alkynes, being hardly achievable with the conventional palladium catalysts.
Cyclopropanation and epoxidation of 1,2-distannylalkenes and 1-silyl-2-stannylalkenes
作者:T.N. Mitchell、B. Kowall
DOI:10.1016/0022-328x(94)05245-7
日期:1995.3
Cyclopropanation of the title compounds is possible under certain conditions (CH2I2-Sm (Hg)) in special cases, but epoxidation is apparently a general reaction which occurs readily in a stereospecific manner when they are treated with m-chloroperbenzoic acid.