Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5277741 | Tetrahedron Letters | 2011 | 7 Pages |
Abstract
One-pot synthesis of disubstituted benzimidazoles from N-substituted 2-nitroanilines or 1,2-diamines with 3-12Â nm-sized platinum particles loaded on the TiO2 using solar and UV-A light is described. 1-Aryl-2-alkylbenzimidazoles from 2-nitrodiphenylamines are formed by combined redox photocatalytic reaction, condensation and catalytic dehydrogenation on Pt-TiO2. In case of diamines, this reaction is proceeded by Pt-TiO2 assisted photocatalytic oxidation of an alcohol and a catalytic dehydrogenation of the intermediate on the surface of platinum nanoparticles. In both cases product formation was achieved by tandem photocatalytic and catalytic reactions on Pt-TiO2.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
K. Selvam, M. Swaminathan,