Phenyliodine Diacetate-Mediated Intramolecular C(<i>sp</i><sup><i>2</i></sup>)H Amidation for 1,2-Disubstituted Benzimidazole Synthesis under Metal-Free Conditions
作者:Saikat Maiti、Prasenjit Mal
DOI:10.1002/adsc.201401110
日期:2015.5.4
A transition metal‐free, hypervalent iodine(III) reagent [phenyliodine diacetate (PIDA)]‐mediated C(sp2)H amidation in trifluoroethanol (TFE) has been developed. The intramolecular coupling methodology presented here provides a direct access to 1,2‐disubstituted multifunctional benzimidazoles in good to excellent yields. The reactions were performed in the open air and at ambient temperature, and
过渡无金属,高价碘(III)试剂[phenyliodine二乙酸酯(PIDA)] -介导的(C SP 2) ħ酰胺化的三氟乙醇(TFE)已被开发。此处介绍的分子内偶联方法可直接获得1,2-二取代的多功能苯并咪唑类化合物,产率高至优异。该反应在露天和环境温度下进行,被认为是生态友好的和原子经济的。