Enantioselective Copper-Catalyzed Decarboxylative Propargylic Alkylation of Propargyl β-Ketoesters with a Chiral Ketimine P,N,N-Ligand
作者:Fu-Lin Zhu、Yuan Zou、De-Yang Zhang、Ya-Hui Wang、Xin-Hu Hu、Song Chen、Jie Xu、Xiang-Ping Hu
DOI:10.1002/anie.201309182
日期:2014.1.27
The first enantioselective copper‐catalyzed decarboxylative propargylic alkylation has been developed. Treatment of propargyl β‐ketoesters with a catalyst, prepared in situ from [Cu(CH3CN)4BF4] and a newly developed chiral tridentate ketimine P,N,N‐ligand under mild reaction conditions, generates β‐ethynyl ketones in good yields and with high enantioselectivities without requiring the pregeneration