Thiazine is an organic compound containing a ring of four carbon, one nitrogen and one sulfur atom. There are three isomers of thiazine, 1,2-thiazine, 1,3-thiazine, and 1,4-thiazine, which differ by the arrangement of the nitrogen and sulfur atoms in the ring.
Derivatives of thiazine, often referred to as thiazines, are used for dyes, tranquilizers and insecticides.
Preparation 1,4-thiazine can be prepared by reduction of the corresponding dicarbonyl using aluminium powder at high temperature.
Tautomers There are three tautomeric forms:
See also Methylene blue, contains a related ring with nitrogen and a positively charged sulfur atom Phenothiazine, a thiazine fused with two benzene rings Thiomorpholine, a saturated analog of thiazine
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