Electrochemical-induced regioselective C-3 thiomethylation of imidazopyridines <i>via</i> a three-component cross-coupling strategy
作者:Jiangwei Wen、Cong Niu、Kelu Yan、Xingda Cheng、Ruike Gong、Mengqian Li、Yongqiang Guo、Jianjing Yang、Hua Wang
DOI:10.1039/c9gc04068d
日期:——
The electrochemical-induced regioselective C-3 thiomethylation of imidazopyridines has been initially accomplished via a three-component cross-coupling strategy using thiocyanate as the sulfur source and methanol as the methyl reagent. This protocol provides a green method for the thiomethylation of imidazopyridines without the need for any exogenous oxidants and metal catalysts under room temperature
Electrochemical C3-methylthiolation of imidazopyridines with dimethyl sulfoxide
作者:Zhaoyue Feng、Yingsibing Fan、Congcong Qiang、Ping Liu、Peipei Sun
DOI:10.1039/d4gc00314d
日期:——
An efficient electrochemical methylthiolation reaction of imidazo[1,2-a]pyridines was achieved. The method used DMSO as both the methylthiolating reagent and solvent and KI as both the hydrogen atom transfer reagent and supporting electrolyte. The reaction was performed under transition metal- and chemical oxidant-free conditions. For various substituted 2-arylimidazo[1,2-a]pyridines, C-3 methylthiolation
实现了咪唑并[1,2- a ]吡啶的高效电化学甲硫基化反应。该方法使用DMSO作为甲硫基化试剂和溶剂,KI作为氢原子转移试剂和支持电解质。该反应在无过渡金属和化学氧化剂的条件下进行。对于各种取代的2-芳基咪唑并[1,2- a ]吡啶,以良好的产率区域选择性地获得了C-3甲基硫基化产物。
DMSO–POCl3: a reagent for methylthiolation of imidazo[1,2-a]pyridines and other imidazo-fused heterocycles
作者:Shashikant M. Patil、Sarang Kulkarni、Malcolm Mascarenhas、Rajiv Sharma、S. Mohana Roopan、Abhijit Roychowdhury
DOI:10.1016/j.tet.2013.07.017
日期:2013.9
A practical and metal free method for methylthiolation of imidazo[1,2-a]pyridines and other imidazo-fused heterocycles using DMSO-POCl3 complex is reported. The reactions are carried out at room temperature that give the corresponding methylthiolated products in good to excellent yield. Further, its application to indole has been demonstrated. (C) 2013 Elsevier Ltd. All rights reserved.