Trihaloisocyanuric acids in ethanol: an eco-friendly system for the regioselective halogenation of imidazo-heteroarenes
作者:José S. S. Neto、Renata A. Balaguez、Marcelo S. Franco、Victor C. de Sá Machado、Sumbal Saba、Jamal Rafique、Fábio Z. Galetto、Antonio L. Braga
DOI:10.1039/d0gc00137f
日期:——
Herein, we describe an efficient, rapid and benign protocol for the direct C(sp2)–H bond halogenation (Cl, Br, I) of 2-arylimidazo[1,2-a]pyridines using trihaloisocyanuric acids in ethanol. Furthermore, this sustainable protocol was successfully extended to imidazopyrimidine, imidazothiazole and indazole heterocycles showing the broadness of this useful approach.
在这里,我们描述了使用乙醇中的三卤代异氰尿酸对2-芳基咪唑[1,2- a ]吡啶进行直接C(sp 2)-H键卤化(Cl,Br,I)的有效,快速和良性方案。此外,这种可持续的协议已成功扩展到咪唑并嘧啶,咪唑并噻唑和吲唑杂环,显示了这种有用方法的广泛性。