Divergent Regio‐ and Stereoselective Gold‐catalyzed Synthesis of α‐Fluorosulfones and β‐Fluorovinylsulfones from Alkynylsulfones
作者:Xiaojun Zeng、Shiwen Liu、Gerald B. Hammond、Bo Xu
DOI:10.1002/chem.201703179
日期:2017.9.4
We developed a widely applicable, highly efficient synthesis of α‐fluorosulfone and β‐fluorovinylsulfone catalyzed by gold. Starting with alkynyl sulfone 1, an [Au]/HF/N‐oxide system gives α‐fluorosulfone 3 via a gold carbene intermediate, and, if no N‐oxide is used, direct addition of HF to 1 gives vinyl sulfone 4 via a vinylfluoro gold intermediate. Both methods have good functional group tolerance