Synthesis of new substituted 5-methyl-3,5-diphenylimidazolidine-2,4-diones from substituted 1-(1-cyanoethyl-1-phenyl)-3-phenylureas
作者:Miloš Sedlák、Roman Keder、Jiří Hanusek、Aleš Růzička
DOI:10.1002/jhet.5570420523
日期:2005.7
prepared by alkaline hydrolysis of 5-methyl-3,5-diphenylimidazolidin-2,4-diones. The 5-methyl-3,5-diphenylimidazolidin-2,4-diones and ureidocarboxylic acids were characterised by their 1H and 13C NMR spectra. Structure of the 5-methyl-5-(4-nitrophenyl)-3-phenylimidazolidine-2,4-dione was verified by X-ray diffraction. The alkaline hydrolysis of individual imidazolidine-2,4-diones was studies spectrophoto-metrically
取代的苯基异氰酸酯与2-氨基-2-苯基丙腈和2-氨基-2-(4-硝基苯基)丙烷腈的反应已用于制备取代的1-(1-氰基乙基-1-苯基)-3-苯基脲。在无水磷酸中,由1-(1-氰乙基-1-苯基)-3-苯基脲形成的第一批产物是4-甲基-4-苯基-2-苯基亚氨基-5-亚氨基-4,5-二氢的磷酸盐-1,3-恶唑,其在随后的水解中给出各自的脲基羧酸。随着反应时间的延长,4-甲基-4-苯基-2-苯基亚氨基-5-亚氨基-4,5-二氢-1,3-恶唑的磷酸酯重排,得到5-甲基-4-亚氨基-磷酸酯。 3,5-二苯基咪唑烷基-2-酮,然后将它们水解成各自取代的5-甲基-3,5-二苯基咪唑烷基-2,4-二酮。脲基羧酸还通过对5-甲基-3,5-二苯基咪唑烷基-2,4-二酮进行碱性水解来制备。5-甲基-3,5-二苯基咪唑啉-2,4-二酮和脲基羧酸的特征在于它们1 H和13 C NMR谱。通过X射线衍射验证了5-甲基-5