Substituted Alkyne Synthesis under Nonbasic Conditions: Copper Carboxylate-Mediated, Palladium-Catalyzed Thioalkyne−Boronic Acid Cross-Coupling
作者:Cecile Savarin、Jiri Srogl、Lanny S. Liebeskind
DOI:10.1021/ol006807d
日期:2001.1.1
[GRAPHICS]A new methodology for the synthesis of substituted alkynes is described. In the presence of copper(I) thiophene 2-carboxylate (CuTC) or copper (I) 3-methylsalicylate (CuMeSal), the palladium-catalyzed cross-coupling of thioalkyne derivatives with boronic acids affords functionalized alkynes in yields ranging from 39 to 91%. This coupling occurs efficiently under mild, nonbasic conditions with a wide variety of thioalkynes and boronic acids, providing a reaction complementary to the Sonogashira protocol.