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)Hamidation 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