Ru(OAc)<sub>3</sub>-Catalyzed Regioselective Difunctionalization of Alkynes: Access to (<i>E</i>)-2-Bromo-1-alkenyl Sulfonates
Lu Chen, Ya Li, Ya Li, Xiao‐Yan Bai, Dian Dong, Meiwei Pan, Ling Huang, Runqin Huang, Xiaotong Long, Yibiao Li, Yibiao Li
Abstract
A new approach is proposed for the divergent and regioselective synthesis of ( E )-2-bromo-1-phenylvinyl trifluoromethanesulfonates through alkyne difunctionalization by employing a compatible system of abundantly available alkynes, N -bromosuccinimide (NBS), and trimethylsilyl trifluoromethanesulfonate (TMSOTf) catalyzed by ruthenium(III) acetate [Ru(OAc) 3 ]. It is a novel method for the preparation of vinyl triflate and it offers a fundamental basis for the development of advanced functional compounds, including drugs and organic functional materials. Unlike previously reported methods, the proposed protocol can tolerate a broad range of functional groups. Alkynes derived from bioactive molecules, such as l (−)-borneol, demonstrate the potential value of this new reaction in organic synthesis.