Ionic Liquid [HNMP][HSO<sub>4</sub>] Promoted One Pot Synthesis of 1,4- Dihydropyridine Derivatives at Room Temperature
作者:Gopinath D. Shirole、Ramesh A. Mokal、Sharad N. Shelke
DOI:10.2174/1570178614666170614085815
日期:2017.8.22
a diversity of other functional groups. Conclusion: In summary, we developed a new protocol for the synthesis of various diethyl 1,4- dihydro-2,6-dimethyl-4-(3-aryl-1-phenyl-1H-pyrazol-4-yl)pyridine-3,5-dicarboxylate derivatives using acidic ionic liquid [HNMP] [HSO4] as a highly efficient catalyst. The DHPs 4a-j were obtained by simply stirring at room temperature for appropriate time. A significant
背景:各种1,4-二氢-2,6-二甲基-4-(3-芳基-1-苯基-1 H-吡唑-4-基)吡啶-3,5-二羧酸二乙酯的高效绿色合成在3-甲基-1-吡咯烷鎓硫酸氢盐[HNMP] [HSO 4 ]存在下,通过3-芳基-1-苯基-1 H-吡唑-4-羧醛,乙酰乙酸乙酯和NH4OAc的多组分缩合反应获得衍生物。作为乙醇中的催化剂。通过在室温下在密封管中简单搅拌合适的时间,已经合成了一系列的1,4-二氢吡啶(DHP)衍生物。该协议具有许多好处,包括简单的后处理程序,出色的产量和环境友好的条件。 方法:在25 mL密封管中装入3-芳基-1-苯基-1 H-吡唑-4-甲醛1(1 mmol),乙酰乙酸乙酯2(0.130 g,2 mmol),NH4OAc 3(0.085)的混合物。(1.2毫摩尔)和100毫克离子液体[HNMP] [HSO 4 ]在10毫升乙醇中的溶液。然后将密封管加盖,并将反应混合物在室温下使用