W. Johnson et al., SYNTHESIS OF SOME 5,6-DIHYDRO-7H-1,4,2-OXATHIAZEPIN-7-ONES AND 5H-4,1,3-BENZOXATHIAZEPIN-5-ONES, Heterocycles, 36(7), 1993, pp. 1471-1476
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 reac
tion of hydroximoyl chlorides (3) with mercapto-carboxylic acids, foll
owed by cyclization with 1,3-dicyclohexylcarbodiimide (6) or 1-ethyl-3
-(3-dimethylaminopropyl)-carbodiimide HCl (7).