Electrochemical nickel-catalyzed Migita cross-coupling of 1-thiosugars with aryl, alkenyl and alkynyl bromides
作者:Mingxiang Zhu、Mouad Alami、Samir Messaoudi
DOI:10.1039/d0cc01126f
日期:——
Here we report a simple route towards the synthesis of thioglycosides, in which electrochemical cross-coupling is used to form a S-C glycosidic bond from protected and unprotected thiosugars with functionalized aryl bromides under base free conditions. The reaction manifold that we report here demonstrates the power of electrochemistry to access highly complex glycosides under mild conditions.
α- and β-thioglycosides serve as effective nucleophiles for Buchwald–Hartwig cross-couplingreactions using functionalized (hetero)arylhalides. The functional group tolerance on the electrophilic partner is typically high, both benzyl and acetate protecting groups on the carbohydrate are tolerated, and anomer selectivities of thioglycosides are high in all cases studied. The efficiency of this general
Site‐Selective S‐Arylation of 1‐Thiosugars with Aryl Thianthrenium Salts through Copper(I)‐Mediated, Photoredox‐ Catalyzed Reactions
作者:Yini Fang、Qing Liang、Lingling Shi、Jiayang Wen、Xinzhang Liu、Xuerui Hong、Xiaoming Zha、Fei Ji
DOI:10.1002/adsc.202400121
日期:2024.5.21
for the synthesis of aryl thioglycosides from the aryl thianthrenium salts and 1‐thiosugars is achieved by copper(I)‐mediated, photoredox‐catalyzed reactions. The desired products could be obtained in 32% to 78% yield after irradiation with 34 W blue light at room temperature. Various functional groups, especially including halogen groups, were well tolerated under standard reaction conditions. This strategy