Solid-Phase Synthesis of Substituted Alkynes Using the Nicholas Reaction
作者:Johan A. Cassel、Stefanie Leue、Natalie I. Gachkova、Nina C. Kann
DOI:10.1021/jo026156u
日期:2002.12.1
The first example of a Nicholas reaction on solid phase is reported, involving the reaction of cobalt complexes of polymer-bound alkynols with different nucleophiles in the presence of a Lewis acid, to form carbon-oxygen or carbon-carbon bonds.
An economic and practical transformation from secondary alkyl-substituted propargyl acetates to a variety of nucleophilic substitution products was described. This reaction was catalyzed by inexpensive InCl3. High yields and excellent chemoselectivity were obtained. The five-, six-, and seven-membered propargyl cycloethers were also successfully constructed by this protocol.