A simple and efficient approach to 2-alkynylbenzofurans under mild copper(i)-catalyzed conditions†
Abstract
The copper(I)-catalyzed synthetic method for the preparation of 2-alkynylbenzofurans from gem-dihaloolefins has been established using DABCO and TBAF·3H2O as a cocatalyst. This methodology relies on a simple reaction system and inexpensive Cu salts as