期刊
RSC ADVANCES
卷 12, 期 53, 页码 34303-34317出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra05413b
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资金
- Ilam University, Ilam, Iran
In this study, a modified mesoporous MCM-41 catalyst (La-Schiff base@MCM-41) was used for the efficient synthesis of 5-substituted 1H-tetrazole derivatives. The catalyst exhibited good stability, heterogeneity, and easy recyclability, making it a promising candidate for catalytic applications.
In this work, mesoporous MCM-41 was modified by a new Schiff-base formed from the condensation of triethylenetatramine and 5-bromosalicylaldehyde. Then, it was used for the stabilization of lanthanum metal (La-Schiff base@MCM-41) as a homoselective, reusable, efficient and biocompatible catalyst in the synthesis of 5-substituted 1H-tetrazole derivatives. The synthesized tetrazoles were characterized using H-1 NMR and FT-IR spectroscopy and methods to measure their physical properties. La-Schiff base@MCM-41 was characterized by using various techniques such as ICP, CHN, XRD, TGA, BET, FT-IR spectroscopy, SEM, EDS and WDX. This catalyst has good stability and a heterogeneous nature, enabling it to be easily recovered and reused several times without significant loss in catalytic activity. This present strategy has important advantages such as utilizing PEG as a green solvent, short reaction times, excellent yields, easy recycling of the catalyst and pure separation of the products. The recovered La-Schiff base@MCM-41 catalyst was characterized by using FT-IR spectroscopy, SEM and AAS.
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