Study of reactions between 1,2-diaza-1,3-butadienes and N,N'-diaryl- or N,N'-dialkylthioureas

Article abstract of DOI:10.1016/S0040-4020(99)00827-3

1,2-Diaza-1,3-butadienes react with N,N'-diarylthioureas to give 2- (arylimino)-2,3-dihydrothiazole derivatives, whereas with N,N'- dialkylthioureas to afford 5,5-disubstituted 3-alkyl-2-(alkylimino)- thiazolidin-4-one derivatives. Under basic conditions,