A Simple and Efficient, Silica Supported Oxon Catalyzed One-pot Synthesis of 2-Aryl- Benzimidazoles (original) (raw)

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A Rapid Access to Novel and Known Benzimidazole Derivatives Using Silica Chloride as a Reusable Catalyst

A new application of silica chloride as an easily available and reusable solid acid catalyst for the synthesis of benzimidazole and its derivatives through the condensation of o-phenylenediamines and orthoesters under thermal and solvent-free conditions is described. This novel and eco-friendly method is very cheap and has many advantages including excellent yields, short reaction time, and simple work-up procedure.

Selective Synthesis of 2-Aryl-1-benzylated-1H-benzimidazoles

Chinese Journal of Chemistry, 2011

An efficient and simple procedure was developed for the green synthesis of various 2-aryl-1-benzylated-1H-benzimidazoles in high yields by condensation of o-phenylenediamine with aldehydes with P 2 O 5 /SiO 2 as catalyst under solvent-free and ambient conditions.

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