Lewis Base-Catalyzed Additions of Alkynes Using Trialkoxysilylalkynes
作者:Robert B. Lettan、Karl A. Scheidt
DOI:10.1021/ol051030f
日期:2005.7.1
[reaction: see text]. The Lewis base-catalyzedadditions of alkynyl nucleophiles to aldehydes, ketones, and imines is described. Mechanistic studies strongly indicate that the use of new triethoxysilylalkynes facilitates access of a reactive hypervalent silicate intermediate. This activated carbon nucleophile subsequently undergoes rapid addition to carbonyl compounds and imines, thus affording the