Abstract
AbstractIn order to gain further mechanistical information about the cyclization of thiosemicarbazones and thiosemicarbazone‐type substrates induced by metallic salts as oxidizing agents, we performed the synthesis of substrates 1a‐s and a kinetic study of the oxidative cyclization of 1 to 5‐imino‐Δ2‐1,3,4‐thiadiazole 2 and 1,2,4‐triazoline‐5‐thione 3 derivatives induced by methanolic ferric chloride solutions. The results of cyclization were compared to those of corresponding semicarbazones. The kinetic data were analyzed by means of the Hammett's equation and ρ values discussed.
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