A lutidine-promoted photoredox catalytic atom-transfer radical cyclization reaction for the synthesis of 4-bromo-3,3-dialkyl-octahydro-indol-2-ones
作者:Quan-Sheng Zhao、Guo-Qiang Xu、Ji-Tao Xu、Zhu-Yin Wang、Peng-Fei Xu
DOI:10.1039/c9cc09876c
日期:——
Reported herein is a visible-light-catalyzed photoredox atom-transfer radical cyclization (ATRC) halo-alkylation of 1,6-dienes with α-halo-ketones as the ATRC reagent. This process exhibits high atom economy, high step economy, and high redox economy, which can directly construct a 4-bromo-3,3-dialkyl-octahydro-indol-2-one core under mild conditions in one pot, and lutidine is found to be the key promoter
本文报道了以α-卤代酮为ATRC试剂的1,6-二烯的可见光催化的光氧化还原原子转移自由基环化(ATRC)卤代烷基化。该方法具有高原子经济性,高阶梯经济性和高氧化还原经济性,可以在温和的条件下在一个锅中直接构建4-溴-3,3-二烷基-八氢-吲哚-2-酮核,并发现了二甲基吡啶成为该ATRC流程的主要推动者。