Construction of the N1–C3 Linkage Stereogenic Centers by Catalytic Asymmetric Amination Reaction of 3-Bromooxindoles with Indolines
作者:Hailong Zhang、Hong Kang、Liang Hong、Weiping Dong、Guolin Li、Xin Zheng、Rui Wang
DOI:10.1021/ol5007423
日期:2014.5.2
The catalytic asymmetric amination reaction of 3-bromooxindoles with indolines for the construction of the N1–C3 linkage stereogenic centers has been realized for the first time. Moreover, the racemic substrates (3-substituted indolines) were also applicable under the same chiral conditions. The newly developed method conveniently led to a formal synthesis of (+)-psychotrimine.
A catalytic asymmetric nucleophilic reverse prenylation of indol-2-ones in situ generated from 3-bromooxindoles with prenyltributylstannane promoted by Ni(II)/chiral N,N′-dioxide was developed. This reaction provides facile access to C3 reverse-prenylated oxindoles in good to excellent enantioselectivities, which enabled the asymmetricsynthesis of debromoflustramine A in five steps.