Abstract

Clay modified by potassium fluoride (KF-modified clay) was used as an ecological alternative and heterogeneous catalyst for the preparation of chalcones via Claisen-Schmidt condensation. In this paper, we have synthesized classical chalcones by condensation of benzaldehyde substituents with acetophenone. Moreover, the other chalcones were also synthesized during the condensation of benzaldehyde substituents with 2-acetylfuran. All the results obtained show that our material can be used as an effective catalyst for the synthesis of chalcones with good yield included between 90 and 99%. The catalyst recycle study shows that the modified clay can be reused four times without a decrease in catalytic activity.

中文翻译：

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改性粘土作为一种高效多相且生态友好的催化剂，用于通过克莱森-施密特缩合反应合成查尔酮

摘要

氟化钾改性的粘土（KF改性的粘土）被用作生态替代品和非均相催化剂，用于通过克莱森-施密特缩合法制备查耳酮。在本文中，我们通过苯甲醛取代基与苯乙酮的缩合合成了经典查耳酮。此外，在苯甲醛取代基与2-乙酰基呋喃缩合过程中还合成了其他查耳酮。所有获得的结果表明，我们的材料可以用作合成查耳酮的有效催化剂，产率在90％至99％之间。催化剂循环研究表明，改性粘土可以重复使用四次而不会降低催化活性。