Visible-light-induced regioselective sulfenylation of imidazopyridines with thiols under transition metal-free conditions
作者:Rajjakfur Rahaman、Shivasish Das、Pranjit Barman
DOI:10.1039/c7gc02906c
日期:——
A metal-freevisible-light-promoted regioselective C-3 sulfenylation of imidazo[1,2-a]pyridines and indoles using thiols has been developed via C(sp2)–H functionalization. This method provides direct access to a wide range of structurally diverse 3-sulfenylimidazopyridines of biological interest. The operational simplicity, eco-energy source, high atom efficiency, and the use of green solvents under
通过C(sp 2)–H官能团开发了一种无金属的可见光促进的咪唑并[1,2- a ]吡啶和吲哚类吲哚类化合物的C-3区域选择性C-3亚磺酰基。该方法提供了直接接触生物感兴趣的结构上广泛的3-亚磺酰基咪唑并吡啶的途径。操作简便,生态能源,高原子效率以及在环境条件下使用绿色溶剂是该方法的一些吸引人的特征。
Copper-catalyzed three-component reaction of imidazo[1,2-a]pyridine with elemental sulfur and arylboronic acid to produce sulfenylimidazo[1,2-a]pyridines
Abstract In this work, an efficient copper-catalyzedthree-componentreaction for the synthesis of sulfenylimidazo[1,2-a]pyridines using elemental sulfur as the sulfenylating agents has been developed. The reaction could proceed smoothly with a high degree of functional group tolerance and provide the desired products in moderate to good yield.
An efficient and convenient copper-catalyzed oxidative chalcogenation of benzothiazoles and imidazo[1,2-a]pyridines with sulfur/selenium powder and aryl boronic acids was developed. This procedure allows access to a wide range of structurally diverse arylchalcogen-substituted benzothiazoles/imidazo[1,2-a]pyridines in good yields and with good functional group tolerance. A biological evaluation revealed
Iodine–triphenylphosphine mediated sulfenylation of imidazoheterocycles with sodium sulfinates
作者:Xuhu Huang、Shucheng Wang、Bowen Li、Xin Wang、Zemei Ge、Runtao Li
DOI:10.1039/c4ra17237j
日期:——
An efficient approach to sulfenyl imidazoheterocycles has been developed via iodine–triphenylphosphine mediated direct sulfenylation of imidazoheterocycles with sodiumsulfinates. The reactions proceed smoothly under transition-metal-free conditions with a broad range of substrate scope, giving the desired products in moderate to excellent yields.
Regioselective sulfenylation of imidazoheterocycles with thiophenols at room temperature is reported. Sulfenylation is promoted by N-chlorosuccinimide under metal-free conditions with a broad range of substrate scopes.