Abstract
As a reaction medium, cyclic guanidinium lactate ionic liquid can catalyze the Knoevenagel condensation of one of aromatic aldehydes with each of active methylene compounds at room temperature in a high yield of over 90% within just 1–7 min. At the same time, the work-up procedure is very simple and the products are not needed to be further purified. The ionic liquid can be easily reused without activity loss.
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