Direct Synthesis of Hydroquinones from Quinones through Sequential and Continuous‐Flow Hydrogenation‐Derivatization Using Heterogeneous Au–Pt Nanoparticles as Catalysts
作者:Hiroyuki Miyamura、Fumiya Tobita、Aya Suzuki、Shū Kobayashi
DOI:10.1002/anie.201904159
日期:2019.7
Pt–Au bimetallic nanoparticle catalysts immobilized on dimethyl polysilane (Pt–Au/(DMPSi‐Al2O3)) have been developed for selective hydrogenation of quinones to hydroquinones. High reactivity, selectivity, and robustness of the catalysts were confirmed under continuous‐flow conditions. Various direct derivatizations of quinones, such as methylation, acetylation, trifluoromethanesulfonylation, methacrylation
固定在二甲基聚硅烷上的Pt-Au双金属纳米颗粒催化剂(Pt-Au /(DMPSi-Al 2 O 3))已开发用于将醌选择性加氢为对苯二酚。在连续流动条件下证实了催化剂的高反应活性,选择性和坚固性。在连续和连续流动条件下成功进行了醌的各种直接衍生化反应,例如甲基化,乙酰化,三氟甲磺酰化,甲基丙烯酸化和苯甲酰化,以良好的产率提供了所需的产品,甚至具有优异的收率。尤其是,对空气敏感的氢醌,如蒽氢醌和萘氢醌,可以在封闭的连续和连续流动条件下成功生成并衍生化而不会分解。