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。
The assembly of two functional molecules via a sulfur linking atom allows an access to a diverse array of thioether‐containing compounds. Herein, we disclose a metal‐free thiolation of imidazopyridines with a variety of functionalized haloalkanes using elemental sulfur.
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.
Synthesis of imidazol[1,2-α]pyridine thioethers via using sulfur powder and halides as reactants
作者:Wei Wu、Yingcai Ding、Ping Xie、Qiujie Tang、Charles U. Pittman、Aihua Zhou
DOI:10.1016/j.tet.2017.02.065
日期:2017.4
generating regioselective alkyl-S- and Ar-S-substituted imidazol[1,2-α]pyridine derivatives in good yields under relatively environmentally friendly and mild conditions. This protocol enriches current thioether-producing methods, making up for the shortcomings of previous sulfenylation methods which can only make MeS- and ArS-substituted imidazol[1,2-α]pyridine derivatives.