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Imidoyl isothiocyanates in the synthesis of condensed quinazolines preparation of 3-aryl-5-phenyl-s-triazolo[4,3-c]quinazolines

Š. Stankovský and A. Boulmokh

Department of Organic Chemistry, Faculty of Chemical Technology, Slovak Technical University, CS-812 37 Bratislava

 

Abstract: TV-Phenylbenzimidoyl isothiocyanate easily isomerizes to 2-phenyl-3H-quinazoline-4-thione, which upon treatment with hydrazine hydrate con­ verts to 2-phenyl-4-hydrazinoquinazoline. This in turn has been converted by standard procedures to the corresponding 2-phenyl-4-quinazolylhydrazones — starting compounds for the oxidative cyclization, leading to 3-aryl-5-phenyl-5-triazolo[4,3-c]quinazolines.

Full paper in Portable Document Format: 433a433.pdf

 

Chemical Papers 43 (3) 433–438 (1989)

Tuesday, June 18, 2024

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