Synthesis of Trifluoromethylated Tetrasubstituted Allenes via Palladium-Catalyzed Carbene Transfer Reaction
作者:Chao Pei、Zhen Yang、Rene M. Koenigs
DOI:10.1021/acs.orglett.0c02638
日期:2020.9.18
Herein, we report on the palladium-catalyzedsynthesis of trifluoromethylated, tetrasubstituted allenes from vinyl bromides and trifluoromethylated diazoalkanes in good to excellent yield. This reaction proceeds via oxidative addition of a Pd(0) complex with vinyl bromide. Subsequent base-promoted reductive elimination generates the allene. This methodology provides an efficient strategy even on gram