A Dual-Catalysis Approach to the Asymmetric Steglich Rearrangement and Catalytic Enantioselective Addition of <i>O</i>-Acylated Azlactones to Isoquinolines
作者:Chandra Kanta De、Nisha Mittal、Daniel Seidel
DOI:10.1021/ja208156z
日期:2011.10.26
A dual-catalysis approach, namely the combination of an achiral nucleophilic catalyst and a chiral anion-binding catalyst, was applied to the Steglich rearrangement to provide α,α-disubstituted amino acid derivatives in a highly enantioselective fashion. Replacement of the nucleophilic co-catalyst for isoquinoline resulted in a divergent reaction pathway and an unprecedented transformation of O-acylated
双催化方法,即非手性亲核催化剂和手性阴离子结合催化剂的组合,应用于 Steglich 重排,以高度对映选择性的方式提供 α,α-二取代氨基酸衍生物。替代异喹啉的亲核助催化剂导致了不同的反应途径和 O-酰化吖内酯的前所未有的转化。该策略提供了高度取代的 α,β-二氨基酸衍生物,具有出色的立体控制水平。