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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Inorganic–organic hybrid silica based tin complex as a novel, highly efficient and recyclable heterogeneous catalyst for the one-pot preparation of spirooxindoles in water
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Inorganic–organic hybrid silica based tin complex as a novel, highly efficient and recyclable heterogeneous catalyst for the one-pot preparation of spirooxindoles in water

机译：无机-有机杂化硅基锡配合物，一种新型，高效且可回收的多相催化剂，用于一锅制备水中的螺菌灵

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摘要

In the present study, a tin complex immobilized on silica gel as a novel, green, highly efficient and heterogeneous reusable catalyst was synthesized by grafting 2-amino benzamide onto the silica gel surface as a result of the reaction between isatoic anhydride and 3-aminopropyl-functionalized silica gel, followed by complexing with tin chloride. The resulting organic–inorganic hybrid material was evaluated in the one-pot three-component synthesis of spiro[indoline-pyrazolo[4’,3’:5,6]pyrido[2,3-d]pyrimidine]trione derivatives in water via the condensation reaction of isatins, barbituric acids, and 1H-pyrazol-5-amines. All the reactions were completed in short reaction times and all the products were obtained in high to excellent yields with high purity. In addition, the synthesized novel catalyst could be separated from the reaction mixture by simple filtration and can be reused up to seven runs without significant loss in activity.
机译：在本研究中，通过将2-氨基苯甲酰胺接枝到硅胶表面上，合成了一种异戊酸酐与3-氨基丙基反应的结果，合成了一种固定在硅胶上的锡配合物，它是一种新颖的，绿色的，高效的，多相可重复使用的催化剂。 -官能化的硅胶，然后与氯化锡络合。通过水一锅[螺]二[吲哚啉-吡唑并[4'，3'：5,6]吡啶[2,3-d]嘧啶]三酮衍生物的一锅三组分合成法评估了所得的有机-无机杂化材料。靛红，巴比妥酸和1H-吡唑-5-胺的缩合反应。所有反应均在较短的反应时间内完成，所有产物均以高纯度至高收率获得。另外，可以通过简单的过滤将合成的新型催化剂从反应混合物中分离出来，并且可以重复使用多达七次，而不会显着降低活性。

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