Fe(III) immobilized over natural bentonite (bent) using the impregnation method. Prepared catalysts were well characterized by XRD, FT‐IR and FeSEM. The catalytic activity of three catalysts 10, 20 and 30 % Fe(III)/bent evaluated for the synthesis of 3,4‐dihydropyrimidin‐2(1H)‐ones known as Biginelli reaction. The catalyst 30 % Fe(III)/bent exhibited a high yield of the product towards the synthesis of a variety of dihydropyrimidones (DHPMs). The high yield of dihydropyrimidone (DHPM) was obtained in model reaction in ethanol, acetonitrile, DMF and solvent ‐ free condition. The reusability test indicated that 6 % of yield of product decreased after 5^th cycle.

中文翻译：

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Fe（III）/膨润土作为多相催化剂合成3,4-二氢嘧啶-2-（1H）-

使用浸渍方法将Fe（III）固定在天然膨润土（弯曲）上。XRD，FT-IR和FeSEM对制备的催化剂进行了很好的表征。三种催化剂10、20和30％Fe（III）/弯曲的催化活性可用于3,4-二氢嘧啶-2（1H）-Biginelli反应的合成评估。30％Fe（III）/苯的催化剂对多种二氢嘧啶酮（DHPM）的合成显示出高产率的产物。在乙醇，乙腈，DMF和无溶剂条件下的模型反应中，获得了高产率的二氢嘧啶酮（DHPM）。可重复使用性测试表明，^第5^个循环后，产品收率降低了6％。