Gold-Catalyzed Oxidative Rearrangement Involving 1,2-Acyl Migration: Efficient Synthesis of Functionalized Dihydro-γ-Carbolines from α-(2-Indolyl) Propargylic Alcohols and Imines
作者:Lu Wang、Xin Xie、Yuanhong Liu
DOI:10.1002/anie.201304700
日期:2013.12.9
side step: A gold‐catalyzed transformation of α‐(2‐indolyl) propargylic alcohols with imines in the presence of the oxidant 8‐isopropylquinoline N‐oxide provided rapid access to highly functionalized dihydro‐γ‐carbolines (see scheme). The reaction mechanism is proposed to involve intermolecular trapping of an α‐carbonyl gold carbenoid intermediate, followed by cyclization and a novel gold‐assisted 1
平稳地移动并采取巧妙的步骤:在氧化剂8-异丙基喹啉N-氧化物存在下,金催化的α-(2-吲哚基)丙炔醇与亚胺的转化提供了快速进入高度官能化的二氢-γ-咔啉的途径(请参见方案)。提出的反应机理涉及分子间捕获α-羰基金类胡萝卜素中间体,然后进行环化和新型金辅助的1,2-酰基迁移。