A series of Brønsted acid-surfactant-combined catalysts (BASCs) functionalised with different acids have been synthesized and applied to catalyze the three-component Mannich reaction with aldehyde, acetone and amine at 25 °C in water. The effects of cation tail length and ions of the ionic liquid and the recyclability of the catalysts and BASC acidity (H0) were investigated. The results demonstrated that the 3-(N,N-dimethyloctylammonium) propanesulfonic acid toluene sulfate ([DOPA][Tos]) provide the best catalytic activity because of the formation of emulsions during the reaction. The catalytic procedure was simple and the catalyst could be recycled 9 times by simple separating processes without noticeably decreasing the catalytic activity.
研究人员合成了一系列用不同酸进行官能化的布氏酸-表面活性剂复合催化剂(BASCs),并将其用于催化醛、
丙酮和胺在 25 °C
水中的三组分曼尼希反应。研究了
离子液体的阳离子尾长和离子的影响以及催化剂的可回收性和 BASC 酸度 (H0)。结果表明,3-(N,N-二甲基辛基
铵)
丙磺酸甲苯硫酸盐([
DOPA][Tos])的催化活性最好,因为在反应过程中会形成乳状液。催化过程简单,催化剂可通过简单的分离过程循环使用 9 次,而催化活性不会明显降低。