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Selective Synthesis of 2-Substituted and 1,2-Disubstituted Benzimidazoles Directly from Aromatic Diamines and Alcohols Catalyzed by Molecularly Defined Nonphosphine Manganese(I) Complex

Kalicharan Das, Avijit Mondal, Dipankar Srimani*

*Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India, Email: dsrimaniiitg.ernet.in

K. Das, A. Mondal, D. Srimani, J. Org. Chem., 2018, 83, 9553-9560.

DOI: 10.1021/acs.joc.8b01316


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Abstract

An acceptorless dehydrogenative coupling of aromatic diamine with primary alcohols enables a selective synthesis of 2-substituted and 1,2-disubstituted benzimidazoles. The reaction is catalyzed by a phosphine-free tridentate NNS ligand-derived manganese(I) complex.

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Key Words

benzimidazoles


ID: J42-Y2018