The synthesis of a novel cellulose supported acidic ionic liquid (Cell-IL) for the solvent-free synthesis of hydroxylated trisubstituted pyridines is reported. Cell-IL was prepared by immobilization of an acidic ionic liquid [1-butyl-3-(3-trimethoxypropyl)-1H-imidazol-3-ium hydrogen sulfate] on cellulose. The viability of this concept has been confirmed by FT-IR, TGA-DTG, 1H NMR and elemental analysis. The Cell-IL showed good thermal stability and exhibited a high catalytic activity in the synthesis of a series of hydroxylated trisubstituted pyridines. It was recovered and reused for the model reaction three times without an appreciable change in its activity.
报道了一种新型
纤维素支持的酸性
离子液体(Cell-IL)的合成,用于无溶剂合成羟基化三取代
吡啶。Cell-IL是通过将一种酸性
离子液体([1-丁基-3-(3-
三甲氧基丙基)-
1H-咪唑-3-ium
氢硫酸盐])固定在
纤维素上制备的。通过FT-IR、TGA-DTG、1H NMR和元素分析确认了该概念的可行性。Cell-IL显示出良好的热稳定性,并在一系列羟基化三取代
吡啶的合成中表现出高催化活性。它被回收并在模型反应中重复使用三次,其活性没有显著变化。