The isomerisation of (Z)-3-[2H1]-phenylprop-2-enone as a measure of the rate of hydroperoxide addition in Weitz–Scheffer and Juliá–Colonna epoxidations
Silver-Catalyzed [2 + 2] Cycloadditions of Siloxy Alkynes
作者:Randy F. Sweis、Michael P. Schramm、Sergey A. Kozmin
DOI:10.1021/ja048251l
日期:2004.6.23
We have described the first [2 + 2] cycloadditions of siloxyalkynes with a range of unsaturated carbonyl compounds. The reactions are efficiently promoted by substoichiometric amount of silver trifluoromethanesulfonimide and display excellent regio- and diastereoselectivity combined with a broad substrate scope. Our studies have established unambiguously the stepwise mechanism of this process and