A new approach to the synthesis of 1,3-dimethyl-4,5-disubstituted imidazolidin-2-ones
摘要:
1, 3 -Dimethyl-4,5-di(ureido)-substituted imidazolidin-2-ones have been synthesised by the nitrosation of 1,3-dimethyl-4,5-di(3-ethylureido)imidazolidin-2-one followed by the reactions of amines with the resulting 1,3-dimethyl-4,5-di(3-nitroso3-ethylureido)imidazolidin-2-one, and the structure of 1,3-dimethyl-4,5-di(3-ethylureido)imidazolidin-2-one has been confirmed by X-ray diffraction analysis.
Two-step α-ureidoalkylation of ureas with 4,5-dihydroxyimidazolidin-2-ones
作者:A. N. Kravchenko、G. A. Gazieva、A. S. Sigachev、E. Yu. Maksareva、K. A. Lyssenko、N. N. Makhova
DOI:10.1007/s11172-007-0024-1
日期:2007.1
Two-step α-ureidoalkylation of ureas with various 4,5-dihydroxyimidazolidin-2-ones gave novel 1,3-dialkyl-4,5-bis(3-alkylureido)-, 1,3-dialkyl-4,5-bis[3-(2-pyrimidyl)ureido]-, or 1,3-dialkyl-4,5-bis(3,3-dialkylureido)imidazolidin-2-ones and ensembles of three imidazolidine rings. The structure of 4,5-bis(2-oxoimidazolidin-1-yl)imidazolidin-2-one was confirmed by X-ray diffraction data.
A new approach to the synthesis of 1,3-dimethyl-4,5-disubstituted imidazolidin-2-ones
作者:Angelina N. Kravchenko、Elena Yu. Maksareva、Sergei V. Vasilevskii、Oleg V. Lebedev、Konstantin A. Lyssenko
DOI:10.1016/j.mencom.2008.01.017
日期:2008.1
1, 3 -Dimethyl-4,5-di(ureido)-substituted imidazolidin-2-ones have been synthesised by the nitrosation of 1,3-dimethyl-4,5-di(3-ethylureido)imidazolidin-2-one followed by the reactions of amines with the resulting 1,3-dimethyl-4,5-di(3-nitroso3-ethylureido)imidazolidin-2-one, and the structure of 1,3-dimethyl-4,5-di(3-ethylureido)imidazolidin-2-one has been confirmed by X-ray diffraction analysis.