Hypervalent Iodine Mediated Efficient Solvent-Free Regioselective Halogenation and Thiocyanation of Fused N-Heterocycles
作者:Divakar Reddy Indukuri、Gal Reddy Potuganti、Manjula Alla
DOI:10.1055/s-0037-1611856
日期:2019.8
2-a]pyridine/pyrimidine heterocycles has been achieved under solvent-free reaction conditions. Halogenations and thiocyanation of the heterocycles could be accomplished by simple grinding of reactants and hypervalent iodine reagents with the corresponding alkali metal or ammonium salts. The method has been extrapolated to a cleaner synthesis of brominated imidazo[1,2-a]pyridine/pyrimidine derivatives
在无溶剂反应条件下实现了咪唑并[1,2-a]吡啶/嘧啶杂环的简便、快速、无金属的区域选择性卤化和硫氰化。杂环的卤化和硫氰化可以通过将反应物和高价碘试剂与相应的碱金属或铵盐简单研磨来完成。该方法已被外推到溴化咪唑并 [1,2-a] 吡啶/嘧啶衍生物的更清洁合成,从相应的杂环胺和取代的 α-溴酮开始,利用原位生成的 HBr 作为溴源。