Visible-light-induced C–S bond formation in the synthesis of 2,4-disubstituted thiazoles through cascade difunctionalization of acetophenone: a greener approach
摘要:
A novel approach for the synthesis of 2,4-disubstituted thiazoles from methyl aryl ketones, N-bromo-succinimide (NBS), and thioamide in water as a green reaction medium through visible-light irradiation is reported.
描述了路易斯酸催化的2-取代的环丙烷1,1-二羧酸酯与硫酮的反应。当使用AlCl 3作为路易斯酸时,在温和的条件下以立体有择的方式高产率地获得了具有两个相邻的季碳原子的高度取代的四氢噻吩。此外,成功地采用了分子内方法来获得硫桥[ n .2.1]双环系统。在类似条件下,硒酮(较重的类似物)的转化导致形成各种四氢硒代苯。
Kinetic Resolution of <i>sec</i>
-Thiols by Enantioselective Oxidation with Rationally Engineered 5-(Hydroxymethyl)furfural Oxidase
作者:Mathias Pickl、Alexander Swoboda、Elvira Romero、Christoph K. Winkler、Claudia Binda、Andrea Mattevi、Kurt Faber、Marco W. Fraaije
DOI:10.1002/anie.201713189
日期:2018.3.5
Various flavoproteinoxidases were recently shown to oxidize primary thiols. Herein, this reactivity is extended to sec‐thiols by using structure‐guided engineering of 5‐(hydroxymethyl)furfural oxidase (HMFO). The variants obtained were employed for the oxidative kinetic resolution of racemic sec‐thiols, thus yielding the corresponding thioketones and nonreacted R‐configured thiols with excellent