Visible light induced palladium catalyzed C H hydroxylation of nitrogen-containing heterocyclic aromatics in the presence of H2O2
作者:Chaoyin He、Xiaodong Fan、Mengmeng Ji、Xinhui Sun、Weiya Zhang、Xianghui Zhu、Zhizhong Sun、Wenyi Chu
DOI:10.1016/j.tetlet.2022.154225
日期:2022.12
A visible-light-induced strategy for the synthesis of phenolic compounds was developed through palladium-catalyzed CH hydroxylation of aromatics with nitrogen-heterocyclic as the directing group and hydrogen peroxide as hydroxylation reagent. Diverse (hetero)arenes with nitrogen-heterocyclic directing groups can be utilized for the ortho CH hydroxylation under mild reaction conditions, and a series
通过钯催化芳烃的 C H 羟基化,以氮杂环为导向基团,过氧化氢为羟基化试剂,开发了一种可见光诱导的酚类化合物合成策略。具有氮杂环导向基团的多种(杂)芳烃可在温和的反应条件下用于邻位CH羟基化,并以良好的收率合成了一系列酚类化合物。该方案具有良好的官能团耐受性和广泛的底物范围,已成功应用于天然产物卡波霉素和药物地拉罗司的合成。根据实验结果和文献调查,光诱导 C 的激进机制提出了 H 羟基化。该方案为通过CH键活化羟基化制备酚类化合物提供了一种新的解决方案。