Oxidative Deprotection of <i>p</i>-Methoxybenzyl Ethers via Metal-Free Photoredox Catalysis
作者:Deok Kyun Ahn、Young Woo Kang、Sang Kook Woo
DOI:10.1021/acs.joc.8b02951
日期:2019.3.15
method for p-methoxybenzyl (PMB) ethers using a metal-free visible light photoredox catalyst and air and ammonium persulfate as the terminal oxidants is presented. Various functional groups and protecting groups were tolerated in the developed method to achieve good to excellent yields in short reaction times. Significantly, the developed method was compatible with PMB ethers derived from primary, secondary
提出了一种高效,绿色的对甲氧基苄基(PMB)醚的脱保护方法,该方法使用无金属的可见光光氧化还原催化剂,以及空气和过硫酸铵作为末端氧化剂。在开发的方法中容许各种官能团和保护基团,以在短的反应时间内获得良好或优异的产率。重要的是,开发的方法与衍生自伯,仲和叔醇的PMB醚以及克级反应兼容。机理研究支持所提出的反应机制,该反应机制涉及PMB醚的单电子氧化。