Issue 3, 2016

Copper supported on H+-modified manganese oxide octahedral molecular sieves (Cu/H-OMS-2) as a heterogeneous biomimetic catalyst for the synthesis of imidazo[1,2-a]-N-heterocycles

Abstract

Copper supported on acid-modified manganese oxide octahedral molecular sieves (Cu/H-OMS-2) was prepared and found to be a versatile catalyst for the oxidative synthesis of 3-aroylimidazopyridines with a broad substrate scope. Cu/H-OMS-2 that was characterized by BET, XRD, XPS, FTIR, TEM, SEM, H2-TPR and O2-TPD techniques could also be used to synthesize 3-aroylimidazopyrimidines and applied in one-pot, three-component reactions of ketones, aldehydes and 2-aminopyridines. The catalytic system employs low loading Cu as the catalytic metal and support H-OMS-2 as the electron-transfer mediator (ETM) to sequentially lower the redox energy barrier, which generates a low-energy pathway and enables the reaction to proceed in a biomimetic way. Moreover, Cu/H-OMS-2 could be reutilized 4 times with a slight decrease in the catalytic activity.

Graphical abstract: Copper supported on H+-modified manganese oxide octahedral molecular sieves (Cu/H-OMS-2) as a heterogeneous biomimetic catalyst for the synthesis of imidazo[1,2-a]-N-heterocycles

Supplementary files

Article information

Article type
Paper
Submitted
28 Aug 2015
Accepted
21 Oct 2015
First published
23 Oct 2015

Catal. Sci. Technol., 2016,6, 890-896

Author version available

Copper supported on H+-modified manganese oxide octahedral molecular sieves (Cu/H-OMS-2) as a heterogeneous biomimetic catalyst for the synthesis of imidazo[1,2-a]-N-heterocycles

X. Meng, J. Zhang, B. Chen, Z. Jing and P. Zhao, Catal. Sci. Technol., 2016, 6, 890 DOI: 10.1039/C5CY01433F

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