Building Congested Ketone: Substituted Hantzsch Ester and Nitrile as Alkylation Reagents in Photoredox Catalysis
作者:Wenxin Chen、Zheng Liu、Jiaqi Tian、Jin Li、Jing Ma、Xu Cheng、Guigen Li
DOI:10.1021/jacs.6b06379
日期:2016.9.28
For the first time, 4-alkyl Hantzsch esters were used to construct molecules with all-carbon quaternary centers by visible light-induced photoredox catalysis via transfer alkylation. Up to a 1500 h(-1) turnover frequency was achieved in this reaction. Reactions of 4-alkyl Hantzsch nitriles as tertiary radical donors joined two contiguous all-carbon quaternary centers intermolecularly, and this chemistry
首次使用 4-烷基 Hantzsch 酯通过转移烷基化通过可见光诱导的光氧化还原催化构建具有全碳四元中心的分子。在此反应中实现了高达 1500 h(-1) 的营业额频率。4-烷基汉茨腈作为叔自由基供体的反应分子间连接了两个连续的全碳四元中心,这种化学反应被用来合成一类羟基类固醇脱氢酶抑制剂的常见前体。