Highly Efficient and Facile Method for Synthesis of 2-Substituted Benzimidazoles via Reductive Cyclization of <i>O</i>-Nitroaniline and Aryl Aldehydes

<table>Possible mechanism and tentative intermediates in the synthesis of benzimidazoles.</table>

Organic Chemistry International

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Scheme 2

Scheme 2: Highly Efficient and Facile Method for Synthesis of 2-Substituted Benzimidazoles via Reductive Cyclization of <i>O</i>-Nitroaniline and Aryl Aldehydes 

Scheme 2 | Highly Efficient and Facile Method for Synthesis of 2-Substituted Benzimidazoles via Reductive Cyclization of O-Nitroaniline and Aryl Aldehydes 