Synthesis of α-Difluoromethylene Ethers via Photoredox-Induced Hyperconjugative Ring Opening of <i>gem</i>-Difluorocyclopropanes
作者:Yu-Rou Zhao、Zhi-Yong Ma、Le Liu、Pin Gao、Xin-Hua Duan、Mingyou Hu
DOI:10.1021/acs.joc.2c03062
日期:2023.3.17
Precise construction of α-difluoromethylene ether (CF2–O) moiety in organic molecules is of high demand. Herein, a visible light-promoted reaction protocol for the synthesis of α-difluoromethylene ether from gem-difluorocyclopropane is described. The key ring-opening step is induced by hyperconjugative interaction of cyclopropane with photo-oxidized aromatic rings. This reaction is easy scale-up, and the