Radical C−H Acylation of Nitrogen Heterocycles Induced by an Aerobic Oxidation of Aldehydes
作者:Subhasis Paul、Manotosh Bhakat、Joyram Guin
DOI:10.1002/asia.201900857
日期:2019.9.16
ketones is described herein. The reaction involves cross-dehydrogenative coupling between aldehydes and heteroaromatic bases with molecular oxygen (O2 ). The key aspect of the method is the generation of reactive acyl radical via homolytic activation of aldehyde C-H bond using O2 as the sole oxidant. The reaction has a good substrate scope with respect to aldehydes and functionalized nitrogen heterocycles
本文描述了用于合成不对称杂芳基酮的需氧自由基方法。该反应涉及醛和杂芳族碱与分子氧(O2)之间的交叉脱氢偶联。该方法的关键方面是使用O2作为唯一氧化剂,通过醛CH键的均质活化来生成反应性酰基基团。关于醛和官能化的氮杂环,该反应具有良好的底物范围。根据我们的机理研究,建议该反应采用自由基链途径。该方法的合成应用在天然生物碱(±)安格西汀的形式合成中得到了证明。