Enantioselective N-H Functionalization of Indoles with α,β-Unsaturated γ-Lactams Catalyzed by Chiral Brønsted Acids
作者:Yinjun Xie、Yingwei Zhao、Bo Qian、Lei Yang、Chungu Xia、Hanmin Huang
DOI:10.1002/anie.201102046
日期:2011.6.14
Nitrogen revives: Cyclic N‐acyliminium ions were generated from α,β‐unsaturated γ‐lactams (1) and underwent intermolecular addition by indole nucleophiles (2) under the catalysis of a chiral Brønsted acid (3). A variety of N‐functionalized indole derivatives containing a pyrrolidinone moiety (4) were assembled with high enantioselectivity. Bn=benzyl.
氮活化剂:环状N酰亚胺离子由α,β-不饱和γ-内酰胺(1)生成,并在手性布朗斯台德酸(3)的催化下由吲哚亲核试剂(2)进行分子间加成。各种具有吡咯烷酮部分(4)的N-官能化的吲哚衍生物都以高对映选择性组装在一起。Bn =苄基。