3-Substituted thiohydantoins (2a-g) were synthesized in satisfactory yields by the reaction of N-substituted thioureas (la-g) with chloroacetylchloride in the presence of triethylamine under reflux in dioxane. S-Alkylated products (7, 8) were obtained from the reaction of 3-p-tolyl -thiohydantoin (2d) with p-nitrobenzylchloride and 3-phenyl-5-chloromethyl-I,2,4-oxadiazole.
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Dürüst et al. (1999) studied this question.
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