Multi‐Functional Oxidase Activity of CYP102A1 (P450BM3) in the Oxidation of Quinolines and Tetrahydroquinolines
作者:Yushu Li、Luet L. Wong
DOI:10.1002/anie.201904157
日期:2019.7.8
Tetrahydroquinoline, quinoline, and dihydroquinolinone are common core motifs in drug molecules. Screening of a 48‐variant library of the cytochrome P450 enzyme CYP102A1 (P450BM3), followed by targeted mutagenesis based on mutation‐selectivity correlations from initial hits, has enabled the hydroxylation of substituted tetrahydroquinolines, quinolines, and 3,4‐dihydro‐2‐quinolinones at most positions
四氢喹啉,喹啉和二氢喹啉酮是药物分子中常见的核心基序。筛选细胞色素P450酶CYP102A1(P450BM3)的48个变体文库,然后基于初始命中的突变-选择性相关性进行定向诱变,使取代的四氢喹啉,喹啉和3,4-二氢-2-羟基化在两个环的大部分位置上,喹啉酮类以合成相关的比例(1.5 g L -1 天-1)。还观察到其他氧化酶活性,例如C-C键去饱和,芳构化和C-C键形成。这些酶变体在关键的活性位点残基S72,A82,F87,I263,E267,A328和A330处具有突变,为合成和药物发现这些构建基分子的氧官能化衍生物提供了直接且可持续的途径。
Photoredox Mediated Acceptorless Dehydrogenative Coupling of Saturated <i>N</i>-Heterocycles
作者:Zongbin Jia、Qi Yang、Long Zhang、Sanzhong Luo
DOI:10.1021/acscatal.9b00123
日期:2019.4.5
We report herein a direct unsymmetric coupling and controllable aromatization reaction of saturatedN-heterocycles enabled by synergistic photoredox and acid catalysis. The reaction furnishes C2–C3 connected biheterocycles in a highly chemo- and regioselective manner under rather mild conditions. Mechanistic studies indicated that the reaction proceeded via enamine-iminium coupling leading to exclusively