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Preparaton of 6-oxo-and 6-thioxo-5, 6-dihydrobenzimidazo [1,2-c] quinazolines

✍ Scribed by A. L. L. Poot; J. F. Willems; F. C. Heugebaert

Publisher: Wiley (John Wiley & Sons)
Year: 2010
Weight: 323 KB
Volume: 72
Category: Article
ISSN: 0037-9646
DOI: 10.1002/bscb.19630720507

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✦ Synopsis

Abstract

Substituted 6‐oxo‐and 6‐thioxo‐5, 6‐dihydrobenzimidazo [1,2‐c] quinazo‐lines were prepared by cyclization of 5(6) and 4(7) substituted 2‐(o‐aminophenyl) benzimidazoles with chloroethyl formate respectively with carbon disulphide.

The 5(6) and 4(7) substituted 2‐(o‐aminophenyl) benzimidazoles were prepared by reductive cyclization of the 4′ and 6′ substituted 2, 2′‐dinitroben‐zanilides which in their turn were obtained from o‐nitrobenzoyl chloride and 4 or 6 substituted o‐nitroanilines.

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