Metal-free alkynylation of α-C–H bonds of ethers with ethynylbenziodoxolones†
Abstract
A metal-free direct alkylation of C–H bonds adjacent to an oxygen or nitrogen atom was developed. This reaction occurred between saturated heterocycles and ethynylbenziodoxolones under mild conditions. A series of 2-alkynyl cyclic alkanes that contain oxygen or nitrogen atoms were prepared in moderate to good yields.