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α-碳基—硫代半缩醛与脂肪族脲反应合成2,4-咪唑啉二酮衍生物
Preparation of 2,4-Imidazolidinediones (Hydantoins) from a-Keto Hemithioacetal and Alkyl Ureas
【摘要】 利用α-羰基—硫代半缩醛与脂肪基取代脲反应合成了六个新的咪唑啉二酮类衍生物,并用IR,NMR,MS和元素分析进行测定,最后用X四圆衍射仪确定了它们的结构.
【Abstract】 1-alkyl-5-phenyl-2,4-imidazolidinediones (4a~4f) have been synthesized by the reaction of a-keto hemithioacetal (1) and alkylureas (3a ~ 3f) in the slightly acidic medium. The structure of compounds (4a~4f) were confirmed by the MS, NMR, IR spectra, elementary analysis and X-ray’ diffraction study. This reaction provides a new convenient method for synthesis of 1,5-disubstituted-2,4-imidazolidinediones.
【关键词】 α-羰基—硫代半缩醛;
Pummerer重排;
脂肪烃基取代脲;
2,4-咪唑啉二酮;
【Key words】 a-keto hemithioacetal; Pummerer rearrangement; alkyl urea; 2; 4- imidazolidinediones;
【Key words】 a-keto hemithioacetal; Pummerer rearrangement; alkyl urea; 2; 4- imidazolidinediones;
【基金】 江苏省教育委员会自然科学基金资助课题
- 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,1999年06期
- 【分类号】O626
- 【被引频次】2
- 【下载频次】64