Molecular iodine enabled generation of iminyl radicals from oximes: A facile route to imidazo[1,2-a]pyridines and its regioselective C-3 sulfenylated products from simple pyridines
作者:Deepak Singh、Soumyadeep Roy Chowdhury、Shyamal Pramanik、Soumitra Maity
DOI:10.1016/j.tet.2021.132125
日期:2021.5
2-a]pyridines from unfunctionalized pyridines and oxime esters. This straightforward method efficiently converts the substrates into corresponding products affording moderate to good yields with large functional group tolerance. Additionally extensive investigation revealed that regioselective domino C-3 methyl sulfenylated imidazo[1,2-a]pyridines were also accessible first time from pyridines and
已经开发了碘促进的简单且环境友好的方案,以从未官能化的吡啶和肟酯中获得咪唑并[1,2- a ]吡啶。这种简单的方法可以有效地将底物转化为相应的产品,从而提供中等到良好的产率以及较大的官能团耐受性。另外,广泛的研究表明,在DMSO溶剂中,吡啶和肟酯类也可以首次获得区域选择性多米诺C-3甲基亚磺酰咪唑并[1,2- a ]吡啶。该反应通过容易获得的肟酯的无金属生成亚胺基进行,从而在吡啶上建立第二个杂环。