Zeolites. Efficient and eco-friendly catalysts for the synthesis of benzimidazoles

MM Heravi, M Tajbakhsh, AN Ahmadi… - Monatshefte für Chemie …, 2006 - Springer
MM Heravi, M Tajbakhsh, AN Ahmadi, B Mohajerani
Monatshefte für Chemie/Chemical Monthly, 2006Springer
… Despite this interest and advantage, however, heterogeneous catalysis in heterocyclization
has been largely overlooked. Because of the importance of benzimidazoles [1–18], in
continuation of our interest in the synthesis of heterocyclic compounds containing nitrogen
[22], and ongoing research in heterogeneous catalysis [23], we wish to report our results for
the synthesis of benzimidazoles using synthetic and natural zeolites. … In conclusion, we
have compared the performance of synthetic and natural zeolites as commercial available …
Summary
A superior method of synthesis of 2-substituted benzimidazoles by means of the heterogeneous catalysis of synthetic and natural zeolites in the reaction of 1,2-diaminobenzene with acid chlorides is described.
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