Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 22, Pages 8719-8725Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo901813g
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- Department of Science and Technology, New Delhi
- Council of Scientific and Industrial Research, New Delhi
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The synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles is described via intramolecular cyclization of o-bromoaryl derivatives using copper(II) oxide nanoparticles in DMSO under air. The procedure is experimentally simple, general, efficient, and free from addition of external chelating ligands. It is a heterogeneous process and the copper(II) oxide nanoparticles can be recovered and recycled without loss of activity.
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