A general and highly selective method for the synthesis of 4-substituted 3a,6a-diphenyltetrahydro-2H-imidazo[4,5-d][1,3]thiazole-2,5(3H)-diones has been developed through a new reaction of 1-substituted 5-hydroxy-4,5-diphenyl-1H-imidazol-2(5H)-nes with potassium thiocyanate in the presence of acetic acid in acetonitrile. Details of supramolecular organization in the crystalline imidazothiazolones, as revealed by X-ray diffraction, are highlighted.
KALCHEVA, V. B.;TSVETANSKA, L. I., XIMIYA GETEROTSIKL. SOEDIN., 1981, N 8, 1028-1030