Studies in the formation of heterocyclic rings containing nitrogen. Part XXIII. Condensation of o-aminobenzamide with aldehydes and Schiff bases

Hanumanthu, P. ; Seshavatharam, S. K. V. ; Ratnam, C. V. ; Subba Rao, N. V. (1976) Studies in the formation of heterocyclic rings containing nitrogen. Part XXIII. Condensation of o-aminobenzamide with aldehydes and Schiff bases Proceedings of the Indian Academy of Sciences, Section A, 84 (2). pp. 57-63. ISSN 0370-0089

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Official URL: http://www.ias.ac.in/j_archive/proca/84/2/57-63/vi...

Related URL: http://dx.doi.org/10.1007/BF03046642

Abstract

N-arylidene orthanilamides undergo isomeric cyclisation in acetic acid to the corresponding 2-aryl-1, 2, 3, 4-tetrahydro-4-oxoquinazolines. The u.v. and n.m.r. spectra of some of the arylidene derivatives and their isomeric tetrahydroquinazolines have neeb studied. Condensation of o-aminobenzamide either with aromatic aldehydes in nitrobenzene or Schiff bases in acetic acid has yielded 2-aryl-4 (3H)-quinazolinones.

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