A rapid and high-yielding silylation of terminal alkynes employing TMSOTf and catalytic quantities of Zn(OTf)(2) has been developed. The reaction works well for a variety of substrates including reactive esters. Fifteen examples with yields of > 90% are reported.
Direct Electrophilic Silylation of Terminal Alkynes
作者:Aleksey A. Andreev、Valeri V. Konshin、Nikolai V. Komarov、Michael Rubin、Chad Brouwer、Vladimir Gevorgyan
DOI:10.1021/ol036328p
日期:2004.2.1
text] A variety of alkynylsilanes were efficiently prepared via direct silylation of terminalalkynes with aminosilanes in the presence of zinc halides. Base- and nucleophile-sensitive functionalities were perfectly tolerated under the above reaction conditions. Initial mechanistic studies support the electrophilic character of this transformation.