Total Syntheses of Cinchona Alkaloids via Photoredox-Catalyzed Deoxygenative Arylation
作者:Lei Li、Hua-Fei Yang、Qian-Hui Ding、Kun Wei、Yu-Rong Yang
DOI:10.1021/acs.orglett.3c01659
日期:2023.6.23
coupling by MacMillan. Inspired by this method, we report herein its first utilization in natural product total synthesis through realizing the coupling of 4-bromo-quinoline or 4-bromo-6-methoxyquinoline with quincorine or quincoridine, respectively. The alcohols were de novo synthesized in racemic form by a key step of the intramolecular Diels–Alder reaction or in an enantioselective manner by Ir/amine
金属光氧化还原使醇脱氧芳基化是MacMillan最近开发的一种用于 sp 2 –sp 3偶联的稳健合成策略。受该方法的启发,我们首次报道了该方法在天然产物全合成中的应用,实现了4-溴喹啉或4-溴-6-甲氧基喹啉分别与喹可林或喹可啶的偶联。通过分子内狄尔斯-阿尔德反应的关键步骤或通过 Ir/胺双催化烯丙基化以对映选择性方式从头合成外消旋形式的醇。可以有效地制备金鸡纳生物碱的所有成员。