Abstract Aminolysis of 3-(p-toluenesulfonoxy) hydantoin (I) through two alternative routes led to the formation of series of both methylene-diurea derivatives (II) and ω-arylsemicarbazido (N-arylacetamides)(III). 3-(p-Toluenesulfonoxy) hydantoin was found to undergo a novel kind of polymerization reaction induced by triethylamine, yielding a new polymer structure which consists of hydantoin groups combined by a hydrazinic linkage. 5-Isopropyl-3-(p- ...