Abstract

This work aims the synthesis of substituted alkenes via Knoevenagel condensation using the clay collected from the Agadir region and modified by KF as a heterogeneous catalyst (KF-modified clay). In this context, the influence of various parameters on the reaction yield was studied, and the reuse of catalyst was carried out. The results obtained show that KF-modified clay is very effective for the preparation of substituted alkenes giving excellent yields (87–99%) and in very short times (between 2–4 s and 8 min) under mild and heterogeneous conditions. In addition, the recycling of our catalyst indicates that our material can be reused several times without losing its catalytic activity.

中文翻译：

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改性粘土作为Knoevenagel反应的新型环保催化剂

摘要

这项工作的目标是使用从阿加迪尔地区收集并经KF改性的多相催化剂（KF改性粘土），通过Knoevenagel缩合反应合成取代烯烃。在此背景下，研究了各种参数对反应产率的影响，并进行了催化剂的再利用。获得的结果表明，在温和和非均质条件下，KF改性粘土对于制备取代烯烃非常有效，可在短时间内（2-4秒至8分钟之间）提供优异的收率（87-99％）。此外，催化剂的循环利用表明我们的材料可以重复使用多次，而不会失去其催化活性。