Room temperature synthesis of 2-benzimidazoles with hydrogen peroxide as oxidant and supported ammonium molybdate as catalyst

Room temperature synthesis of 2-benzimidazoles with hydrogen peroxide as oxidant and supported... An environmentally benign method with hydrogen peroxide as oxidant has been developed for the synthesis of 2-benzimidazoles from aromatic aldehydes and o-phenylenediamine. Ammonium molybdate catalyzes this transformation, and supported ammonium molybdate was more active than the unsupported compound. Results from characterization imply SiO2-supported ammonium molybdate has a planar structure, which explains its high activity but poor stability, because of loss of active species during the reaction. Good activity and stability were observed for TiO2 and γ-Al2O3-supported ammonium molybdate; this was ascribed to the porous structure of the supports and the highly dispersed active species. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Room temperature synthesis of 2-benzimidazoles with hydrogen peroxide as oxidant and supported ammonium molybdate as catalyst

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Publisher
Springer Netherlands
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1683-9
Publisher site
See Article on Publisher Site

Abstract

An environmentally benign method with hydrogen peroxide as oxidant has been developed for the synthesis of 2-benzimidazoles from aromatic aldehydes and o-phenylenediamine. Ammonium molybdate catalyzes this transformation, and supported ammonium molybdate was more active than the unsupported compound. Results from characterization imply SiO2-supported ammonium molybdate has a planar structure, which explains its high activity but poor stability, because of loss of active species during the reaction. Good activity and stability were observed for TiO2 and γ-Al2O3-supported ammonium molybdate; this was ascribed to the porous structure of the supports and the highly dispersed active species.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: May 20, 2014

References

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