Synthesis and chemical properties of 1-ethyl-3-aryl-2-imidazolidinones with a hydroxyurea fragment in the 4 position

Treatment of 2-ethylamino-2-methylpropanol oxime with aryl isocyanates leads to 4-N-(arylcarbamoyl) hydroxyamino -1-ethyl-3-aryl-5,5-dimenthyl-2-imidazolidionones, which are acylated by acid chlorides and methyl isocyanate to give the corresponding O-acyl derivatives and are converted to 2-(2-oxo-1-ethyl-3-aryl-5,5-dimethyl-4-imidazolidinyl)-4-aryl-1,2,4-oxadiazolidine-3,5-diones by the action of methyl chlorocarbonate.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 980–983, July, 1980.