Thiatriazines

The 1,2,4,6-thiatriazine system is the most common in all the oxa- and thi-atriazine series, and some investigations of the tautomeric behavior of 1,2,4,6-thiatriazine 1,1-dioxides 135, which can exist as N[2(6)]H 135a and N(4)H 135b tautomers (Scheme 39), have been performed. 

Reactions of arylchloromethyl-p-tolyl sulfoxides with tetrasulfur tetranitride (S4N4) yield 3,5-diaryl-1,2,4,6-thiatriazine 1-oxides <00T7153>. [4+2] Cycloadditions of thiazyl... 

Of the thiatriazines, the 1,2,4,6-system has been the most studied. There has been particular interest in TV-alkyl-1,2,4,6-thiatriazine 1,1-dioxides because of their herbicidal, fungicidal, and histamine H2-antagonist activity (86TL123,87S170). The preparation of l-chloro-l,2,4,6-thiatriazines (576) by reaction of imidoylamidines (575) with an excess of sulfur dichloride was reported (80JOU1303). 

Two articles have appeared very recently dealing with ring expansion of l, 2,3,5-thiatriazoles to 1,2,4,6-thiatriazines <20070BC472> and with the transformation of pyranopyrimidines to 1,2,3,5-thiatriazolopyrimidine-l-oxide... 

C4H,Cl3F3N3OS 2H-1,2,4,6-Thiatriazin 3-Trichlor-methyl-5-trifluormethyl- -1-oxid E9c, 821 (S-C1-S = 0)... 

Three Nitrogen Atoms and One Sulfur Atom 1,2,4,6-Thiatriazine free radicals, EPR spectroscopy of 90MI64. 

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