Construction of Quaternary Carbon Center by Catalytic Asymmetric Alkylation of 3‐Arylpiperidin‐2‐ones Under Phase‐Transfer Conditions
作者:Tomoaki Inukai、Taichi Kano、Keiji Maruoka
DOI:10.1002/anie.201913518
日期:2020.2.3
A highly enantioselective synthesis of δ-lactams having a chiral quaternary carbon center at the α-position has been developed through an asymmetric alkylation of 3-arylpiperidin-2-ones under phase-transfer conditions. In this transformation, a 2,2-diarylvinyl group on the δ-lactam nitrogen atom plays a crucial role as a novel protecting group and an achiral auxiliary for improving both yield and enantioselectivity
通过在相转移条件下3-芳基哌啶-2-酮的不对称烷基化,已经开发出高度对映选择性的在α-位具有手性季碳中心的δ-内酰胺。在该转化中,δ-内酰胺氮原子上的2,2-二芳基乙烯基作为新型保护基和非手性助剂,对于提高反应的收率和对映选择性都起着至关重要的作用。