One–pot A3–coupling solvent–free synthesis of propargylamines by Pd–impregnated Al–based LDHs synthesized from aluminum salt slag

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2024-10-05 DOI:10.1016/j.mcat.2024.114594

Raihamol Erattammottil Thampikannu , Alejandro Jiménez , Vicente Rives , Miguel Ángel Vicente , Kannan Vellayan

引用次数: 0

Abstract

Several Al³⁺–based LDHs with different divalent cations have been synthesized by coprecipitation from aluminum salt slag and have been impregnated with Pd. After their characterization by PXRD, FT–IR, thermal analysis, N₂ adsorption–desorption isotherms at –196 °C and electron microscopy (SEM and TEM), they were used as heterogeneous catalysts in the A³–coupling reaction (benzaldehyde + morpholine + phenylacetylene) to produce propargylamines. The catalyst that showed the best results was NiAl–Pd and the optimal reaction conditions were: catalyst dose 30 mg, temperature 80 °C and reaction time 6 h. In addition, this catalyst showed a good cyclic behavior, retaining a catalytic activity higher than 80 % after 4 cycles.

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用铝盐渣合成的钯浸渍铝基 LDH 单锅 A3 偶联无溶剂合成丙炔胺

通过铝盐渣共沉淀法合成了几种含有不同二价阳离子的 Al3+ 基 LDHs，并在其中浸渍了钯。通过 PXRD、傅立叶变换红外光谱、热分析、-196 °C 下的 N2 吸附-解吸等温线和电子显微镜（SEM 和 TEM）对它们进行表征后，将它们用作 A3 偶联反应（苯甲醛 + 吗啉 + 苯乙炔）中的异相催化剂，以生成丙炔胺。NiAl-Pd 催化剂的效果最好，最佳反应条件为：催化剂剂量 30 毫克，温度 80 °C，反应时间 6 小时。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods