Reaction of arenediazonium salts with rhodanine,thiohydantoin, and their derivatives

Under conditions of the O,S-arylation of rhodanine and isorhodanine by arenediazonium salts, 5-arylhydrazono-2-arylthio-2-thiazolin-4-ones and 5-arylhydrazono-4-arylthio-3-thiazolin-2-ones have been obtained. Under similar conditions, 5-ethylrhodanine forms not only 2-arylthio-5-ethyl-2-thiazolin-4-ones but also 2-arylazothio-5-ethyl-2-thiazolin-4-ones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1487–1492, November, 1973.