The α-ureidoalkylation of N-(hydroxyalkyl)ureas (ureido alcohols) with 1,3-H2- and 1,3-Me2-4,5-dihydroxyimidazolidin-2-ones was systematically studied. The yields of glycolurils decrease both in going from 1,3-H2- to 1,3-Me2-4,5-dihydroxyimidazolidin-2-one and with increasing length (or with branching) of the hydroxyalkyl chain in ureido alcohols. The optimal reaction time for ureido alcohols is 1 h. The X-ray diffraction study showed that 2-(2-hydroxy-1,1-dimethylethyl)glycoluril crystallizes as a conglomerate. The enantiomeric analysis of 2-(2-hydroxyethyl)glycoluril was carried out by chiral-phase HPLC.
系统研究了 N-(羟基烷基)
脲(
脲醇)与 1,3-H2- 和 1,3-Me2-4,5- 二羟基
咪唑烷-2-酮的 α-ureido 烷基化反应。从 1,3-H2- 到 1,3-Me2-4,5-二羟基
咪唑烷-2-酮的过程中,以及随着
脲基
乙醇中羟基烷基链长度(或分支)的增加,糖醛酸的产量都会降低。X 射线衍射研究表明,2-(2-羟基-
1,1-二甲基乙基)甘
氨酰
脲结晶为团聚体。采用手性相高效
液相色谱法对 2-(2-羟乙基)甘
氨酰
脲进行了对映体分析。