High-Performance Ammonium Hypoiodite/Oxone Catalysis for Enantioselective Oxidative Dearomatization of Arenols
作者:Muhammet Uyanik、Takehiro Kato、Naoto Sahara、Outa Katade、Kazuaki Ishihara
DOI:10.1021/acscatal.9b04322
日期:2019.12.6
A high-performance enantioselective quaternary ammonium hypoiodite catalysis was developed for the dearomatization of arenols using oxone as an environmentally benign oxidant. The oxidation of not only 1- and 2-naphthols but also phenols, which were hardly reactive using the previous hypoiodite catalysis, readily proceeded under mild conditions, and only inorganic wastes were generated from the oxidant
开发了一种高性能的对映选择性季铵盐次碘酸盐催化剂,用于使用恶唑酮作为环境友好的氧化剂对芳烃进行脱芳烃反应。在以前的次碘酸盐催化下,几乎不具有反应性的不仅是1-萘酚和2-萘酚的氧化,而且苯酚的氧化也容易在温和的条件下进行,并且所用氧化剂仅产生无机废物。对照实验和拉曼分析揭示了I +的原位生成,例如次碘酸是一种不稳定的活性物质,分子碘(I 2)是一种稳定的休眠物质。在大多数情况下本我的优点+ /过硫酸氢钾催化,相比先前的I + /(H 2 ö 2 或ROOH)系统,可能是由于在酸性条件下产生了稳定的休眠状态和更高的催化剂反应性所致。