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Communication | Regular issue | Vol 36, No. 7, 1993, pp.1471-1476
Published online, 1st January, 1970
DOI: 10.3987/COM-93-6361
Synthesis of Some 5,6-Dihydro-7H-1,4,2-oxathiazepin-7-ones and 5H-4,1,3-Benzoxathiazepin-5-ones

Wynona Johnson, Stuart Littler, and Colin Skene*

*CSIRO, Division of Chemicals and Polymers, Praivate Bag 10, Clayton, South MDC, Victoria, 3168, Australia

Abstract

The novel heterocyclic systems 5,6-dihydro-7H-1,4,2-oxathiazepin-7-one (1) and 5H-4,1,3-benzoxathiazepin-5-one (2) were prepared by the reaction of hydroximoyl chlorides (3) with mercapto-carboxylic acids, followed by cyclization with 1,3-dicyclohexylcarbodiimide (6) or 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide HCl (7).