Simple but efficient synthesis of novel substituted benzimidazoles over ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>
作者:N. Thimmaraju、S. Z. Mohamed Shamshuddin、S. R. Pratap、K. Raja、M. Shyamsundar、T. E. Mohankumar
DOI:10.1080/00397911.2016.1215468
日期:2016.9.16
activity in the synthesis of a series of novel substituted benzimidazoles. The reaction conditions were optimized by varying the solvents, reaction temperature, weight of solid acid catalyst, molar ratio of the reactants, and reaction time. The ZrO2-Al2O3 solid acid catalytic material prepared by urea as a fuel was found to be highly active, recyclable, and reusable in the synthesis of benzimidazoles
Copper(II)-Catalyzed Oxidative Coupling of Anilines, Methyl Arenes, and TMSN<sub>3</sub> via C(sp<sup>3</sup>/sp<sup>2</sup>)–H Functionalization and C–N Bond Formation
Copper(II)-catalyzed cross-coupling of anilines, methyl arenes, and TMSN3 in the presence of tert-butylhydroperoxide at moderate temperature produced 2-aryl benzimidazoles via a tandem C(sp3/sp2)–H functionalization and C–N bond formations. The selectivity and multiple C–H functionalization of the simple substrates are significant practical features.