An efficient base-catalyzed synthesis of dihydropyrimidines and N-acetyl pyrazoles is reported using 1-(2-aminoethyl)piperazine-modified nano-NaY zeolite (ZeSi–AP) under mild and green conditions. The structure of the catalyst was identified by using FT-IR, XRD, TGA, DTA, DLS, SEM, TEM, and elemental analyses. This heterogeneous catalyst has many benefits, such as a simple work-up procedure, high product yield, and it is easily regenerated and reused at least for four cycles without losing its activity.

中文翻译：

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用于合成 N-乙酰基吡唑和二氢嘧啶的胺官能化纳米 NaY 沸石

据报道，在温和和绿色条件下，使用 1-（2-氨基乙基）哌嗪改性的纳米 NaY 沸石（ZeSi-AP）有效地碱催化合成二氢嘧啶和N-乙酰基吡唑。通过使用FT-IR、XRD、TGA、DTA、DLS、SEM、TEM和元素分析确定了催化剂的结构。这种非均相催化剂具有许多优点，例如后处理程序简单，产品收率高，并且易于再生和重复使用至少四个循环而不会失去其活性。