Selective Modular Synthesis of <i>ortho</i>-Substituted Phenols via Pd-Catalyzed Dehydrogenation–Coupling–Aromatization of Alcohols
作者:Guangkuo Zeng、Lingyun Shen、Qingshu Zheng、Tao Tu
DOI:10.1021/acscatal.3c00826
日期:2023.5.5
Phenols are pivotal precursors and core motifs for various fine chemicals, bioactive molecules, and functional materials, among which the site-selective syntheses of ortho-substituted phenols are very attractive and challenging. Here, we present a palladium-catalyzed dehydrogenation–coupling–aromatization protocol to access ortho-substituted phenols from cyclohexanols with primary alcohols. Broad substrate
酚类是各种精细化学品、生物活性分子和功能材料的关键前体和核心基序,其中邻位取代酚类的定点合成极具吸引力和挑战性。在这里,我们提出了一种钯催化的脱氢-偶联-芳构化方案,以从环己醇和伯醇中获得邻位取代的苯酚。在此模块化协议中,以水和氢气作为清洁副产品,实现了广泛的底物范围。邻位单取代和邻位二取代很容易通过 N-杂环卡宾 (NHC) 配体和碱的量来控制。