Triazinobenzothiazine — A New Heterocyclic System via a Novel Cyclization Reaction

The synthesis and X-ray structure of 9-chloro-2,4-dimethyl[1,3,5]triazino[2,1-c]-1,4-benzothiazine-1,3(2H,4H)-dione (2) are reported. A mechanism is proposed for the formation of this novel heterocyclic system