【摘要】 以不同的高级脂肪酸和Ｎ－（β－羟乙基）一乙二胺（ＨＥＥＤ）为原料合成了八 种烷基咪唑啉中间体。通过ＩＲ，ＭＳ等手段鉴定了这些中间体的结构，讨论了反 应条件对烷基咪唑啉收率的影响。定量研究了烷基咪唑啉环在水介质中的稳定性， 证明环的稳定性与介质的ｐＨ值及放置时间有关。探讨了水解开环反应的机理。更多还原

【Abstract】 Eight kinds of 1- β-hydroxy ethyl)-2-alkyl imidazolines (HEAI) are synthe sized with various natural fatty acids and N- (β-hydroxy-ethyl)-ethylene dia-mine (HEED) With the aid of infrared, ultra-violet and mass spectra, the struc tures of these HEAIs are characterized. Two synthetic methods of producing HEAI are tried: one, by condensation to remove water azeotropically with the mixed xylenes; while the other, under vacuum. The factors involving mole ratios (HEEI)/RCOOH) , reaction temperatures and time on the yields of HEAI are studied. It is found that the imidazoline ring is not always stable in aque-ous solutions. In alkali medium, the ring is very easy to open, producing linear amides. The dependence on percentages of ring opening with the pH values are in vestigated.The mechanism of imidazoline ring opening is also suggested.更多还原