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Note | Regular issue | Vol 63, No. 5, 2004, pp.1153-1163
Published online, 5th March, 2004
DOI: 10.3987/COM-03-9974
A Convenient Synthesis of Some New 1,3,4-Benzothiadiazepin-5-ones

Jalal A. Zahara, Bassam A. Abu Thaher, Mustafa M. El-Abadelah,* and Roland Boese

*Institut für Anorganische Chemie, Universität Duisburg-Essen, Campus Essen, Universitätstrasse, 3-5, D-45117 Essen, Germany

Abstract

A synthesis of new 1,3,4-benzothiadiazepin-5-ones (6a-c) has been achieved via cyclocondensation, promoted by acetic anhydride at reflux, of the corresponding acyclic 2-{[2-oxo-1-(N-arylhydrazono)propan-1-yl]mercapto}benzoic acids (4a-c). Structural assignments of the heterocyclic products (6a-c) are based on analytical, spectral (IR, MS and NMR) and X-Ray crystal structure data.