Synthesis, of novel 2-p-methoxybenzylideneimino-5-arylimino-3-oxo-1,2,4-thiadiazolidines

Abstract

N-Bromosuccinimide has been used as a novel reagent to afford a simple and convenient synthesis of certain 2-p-methoxybenzylidenemino-5-arylimino-3-oxo-1,2,4-thiadiazolidines (IIIa-e) by the oxidative cyclodehydrogenation of the related 1-aryl-5-(p-methoxybenzylidenemino)-2,4-thiobiurets (Ia-e) ,IIIa-e have also been obtained alternatively by the oxidative debenzylation of the corresponding 1-aryl-5-(p-methoxybenzylidenemino)-2-S-benzyliso-2,4-thiobiurets (IIa-e) with molecular bromine in chloroform, which were prepared by the benzylation of Ia-e. The plant growth regulator activity of IIIa-e have also been investigated.