Synthesis of α-Difluoromethylene Ethers via Photoredox-Induced Hyperconjugative Ring Opening of gem-Difluorocyclopropanes

YR Zhao, ZY Ma, L Liu, P Gao… - The Journal of Organic …, 2023 - ACS Publications
YR Zhao, ZY Ma, L Liu, P Gao, XH Duan, M Hu
The Journal of Organic Chemistry, 2023ACS Publications
Fluorinated compounds have found widespread applications in pharmaceuticals,
agrochemicals, and materials science. 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 …
Fluorinated compounds have found widespread applications in pharmaceuticals, agrochemicals, and materials science. Precise construction of α-difluoromethylene ether (CF2O) 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 products bearing a synthetic handle enable their further manipulation.
ACS Publications
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