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Report | Regular issue | Vol 22, No. 9, 1984, pp.1985-1988
Published online, 1st January, 1970
DOI: 10.3987/R-1984-09-1985
Formation of Aminoquinazolinones from N-(2-Aminobenzoyl)-N’-aroylhydrazines

Melinda Gál,* Endre Tihanyi, and Péter Dvortsák

*Institute for Drug Research Ltd., H-1325 Budapest, POB 82, Hungary

Abstract

The ring closure of N-(2-aminobenzoyl)-N’-aroylhydrazines 3 in AcOH/TsOH yielded 2-aryl-3-amino-4(3H)-quinazolinones 6 instead of 2-aryl-3,4-dihydro-5H-1,3,4-benzotriazepin-5-ones 4 as reported before. The structure of the aminoquinazolinones 6 was confirmed by unambiguous synthesis.