Cost-effective and carbon dioxide absorbing ionic liquid, tri-(2-hydroxyethyl) ammonium acetate, was shown to perform multiple roles in Knoevenagel condensation. It acted as an environmentally benign solvent, as an activating catalyst for the less reactive cyanoacetic acid and also as a risk reduction medium for the unevenly generated large amount of CO2 gas for large scale reactions. The reaction was scaled up for multi-gram synthesis of commercially important alpha cyanoacrylic acids.
一种具有成本效益且能吸收
二氧化碳的
离子液体三-(2-羟乙基)
铵乙酸盐在Knoevenagel缩合反应中表现出多重作用。它作为一种环境友好的溶剂,作为反应性较低的
氰基
乙酸的活化催化剂,同时也作为大规模反应中对不均匀生成的大量
二氧化碳气体的风险降低介质。该反应已扩展至多克规模,以合成商业上重要的α-
氰基
丙烯酸。