Abstract
New convenient methods for the synthesis of 1,2,3-thiadiazole, 1,3,4-thiadiazine,
and 1,2,5-triazepine derivatives are reported. In the heterocyclization process, the
reactivity of 1-thia-4-aza-1,3-butadiene system of syn -2-phenylhydrazono-3-oxothiobutanoic acid anilides was exploited.
Key words
ring closure - heterocycles - cyclizations - thiadiazole - thiadiazine - triazepine
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