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Copper(I) Zeolites as Heterogeneous and Ligand-Free Catalysts: [3+2] Cycloaddition of Azomethine Imines

机译:铜(I)沸石作为多相和无配体催化剂:偶氮甲亚胺的[3 + 2]环加成反应

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摘要

Copper(I)-exchanged zeolites were used as heterogeneous ligand-free catalysts for [3+2] cycloaddition of azomethine ylides, which allows versatile, efficient, and highly regioselective synthesis of pyrazolone derivatives. These cheap and easy-to-prepare catalysts exhibit wide scope and compatibility with functional groups. They are very simple to use, easy to remove (by simple filtration), and recyclable (up to six times without loss of activity).
机译:铜(I)交换的沸石用作偶氮次甲基的[3 + 2]环加成反应的无均相无配体催化剂,可实现吡唑啉酮衍生物的通用,高效和高度区域选择性合成。这些廉价且易于制备的催化剂表现出宽范围和与官能团的相容性。它们非常易于使用,易于去除(通过简单过滤)和可回收利用(最多可回收六次,而不会损失活性)。

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