Oxidative radical coupling of hydroquinones and thiols using chromic acid: one-pot synthesis of quinonyl alkyl/aryl thioethers
作者:T. P. Adarsh Krishna、Sakthivel Pandaram、Suresh Chinnasamy、Andivelu Ilangovan
DOI:10.1039/d0ra01519a
日期:——
An efficient, simple and practical protocol for one-pot sequential oxidative radical C–H/S–H cross-coupling of thiols with hydroquinones (HQs) and oxidation leading to the formation of quinonyl alkyl/aryl thioethers using H2CrO4 was developed. This cross-coupling of thiyl and aryl radicals offers mono thioethers in good to moderate yield and works well with a wide variety of thiols. Similarly, this
开发了一种高效、简单且实用的方案,用于硫醇与氢醌 (HQ) 的一锅顺序氧化自由基 C–H/S–H 交叉偶联和氧化,从而使用 H 2 CrO 4形成醌基烷基/芳基硫醚。硫基和芳基的这种交叉偶联以良好至中等的产率提供单硫醚,并且与多种硫醇配合良好。同样,该方法适用于 2-氨基苯硫酚和 HQ 的偶联形成吩噻嗪-3-酮5a–c 。首次使用铬试剂观察到通过硫醚合成形成 C-S 键。对化合物5a–c药代动力学特性的理论研究表明,由于具有药物样特性,化合物5b与阿尔茨海默病 (AD) 相关的 AChE 靶位点强烈结合。