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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 41, 2011 - Issue 12
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Original Articles

Aqueous 1 M Glucose Solution as a Novel and Fully Green Reaction Medium and Catalyst for the Oxidant-Free Synthesis of 2-Arylbenzimidazoles

, &
Pages 1794-1804 | Received 19 Apr 2010, Published online: 29 Apr 2011
 

Abstract

The reaction of various o-phenylenediamines and substituted benzaldehydes was carried out in 1 M glucose solution as reaction medium and catalyst under one-pot oxidant-free conditions. The desired products were obtained at 60 °C with good to excellent yields, and the reaction was performed chemoselectively without formation of 1,2-disubstituted benzimidazoles. No need for any extra oxidant, simple workup, and use of carbohydrates as fully green promoters are some advantages of the present work.

ACKNOWLEDGMENT

The authors gratefully acknowledge the Research Council of K. N. Toosi University of Technology for partial financial support of this work.

Notes

a Reaction conditions: o-phenylenediamine (1 mmol), benzaldehyde (1 mmol), and different volumes of aqueous 1 M glucose solution.

b Isolated yield.

a Isolated yield.

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