Acid-catalyzed reaction of 2-arylidenecyclohexanones 1 with N-substituted dithiocarbamic acids 2 gave open-chain addition products 3 and 4. Dehydration of 3 and 4 afforded only one of the three possible isomeric N-substituted 4 H-3,1-benzothiazine-2(1 H)-thiones 5 and 6.
- H- andC-spectroscopy
- N-Substituted 4 H-3,1-benzothiazine-2(1H)-thiones
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