Gold(I)-Catalyzed Stereoconvergent, Intermolecular Enantioselective Hydroamination of Allenes
作者:Kristina L. Butler、Michele Tragni、Ross A. Widenhoefer
DOI:10.1002/anie.201201584
日期:2012.5.21
Gold and silver: A 1:2 mixture of [(S)‐1}(AuCl)2] and AgBF4 catalyzes the enantioselective hydroamination of chiral, racemic 1,3‐disubstituted allenes with N‐unsubstituted carbamates to form N‐allylic carbamates in good yield, with high regio‐ and diastereoselectivity, and up to 92 % ee (see scheme, Cbz=benzyloxycarbonyl).
金和银:[( S )- 1 }(AuCl) 2 ] 和 AgBF 4的 1:2 混合物催化手性、外消旋 1,3-二取代丙二烯与 N-未取代氨基甲酸酯的对映选择性加氢胺化反应形成N-烯丙基氨基甲酸酯产率高,区域选择性和非对映选择性高,ee高达 92% (参见方案,Cbz=苄氧羰基)。