Sonogashira Reactions with Propyne: Facile Synthesis of 4-Hydroxy-2-methylbenzofurans from Iodoresorcinols
作者:Martin A. Berliner、Eric M. Cordi、Joshua R. Dunetz、Kristin E. Price
DOI:10.1021/op900263b
日期:2010.1.15
The Sonogashira reaction of terminal alkynes and ortho-halophenols with subsequent cyclization is a well-precedented method for the synthesis of substituted benzofurans. Here we describe the extension of this method to the coupling of 2-iodoresorcinols and terminal alkynes, including propyne, to give 4-hydroxy-2-substituted benzofurans. In particular, we describe the screening, method development,