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Microwave assisted one pot three component synthesis of propargylamine, tetra substituted propargylamine and pyrrolo[1,2-a]quinolines using CuNPs@ZnO-PTh as a heterogeneous catalyst

Abstract

The present work deals with the investigation and catalytic activity of copper nanoparticles (CuNPs) supported on Zinc oxide-polythiophene (ZnO-PTh) nanocomposite. CuNPs@ZnO-PTh was prepared using simple impregnation method and characterized using various techniques (XRD, XPS, FT-IR, SEM, ICP-AES, TEM, TEM-EDS and EDAX). HR-TEM indicates that CuNPs supported on ZnO-PTh were of spherical in shape and distributed uniformly over the nanocomposite with particle size ~2-8 nm. Further, synthesized CuNPs@ZnO-PTh was used as a heterogeneous catalyst for the synthesis of propargylamine, tetra substituted propargylamine (A3 and KA2 coupling reactions) and pyrrolo[1,2-a]quinoline (A3 coupling reactions) using microwave technique in ethylene glycol as a recyclable, green and biodegradable solvent with 98% yield. The high catalytic activity of CuNPs@ZnO-PTh was due to the high surface area and synergetic effect of both CuNPs and ZnO-PTh nanocomposite, which makes it cost effective, environmentally benign with high atom economy. Considering all above facts, this protocol was found to be more efficient and sustainable as compared to available commercial methods.

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Supplementary files

Publication details

The article was received on 24 Jan 2018, accepted on 05 Apr 2018 and first published on 06 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ00410B
Citation: New J. Chem., 2018, Accepted Manuscript
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    Microwave assisted one pot three component synthesis of propargylamine, tetra substituted propargylamine and pyrrolo[1,2-a]quinolines using CuNPs@ZnO-PTh as a heterogeneous catalyst

    A. P. Shah, A. Sharma, S. Jain and N. G. Shimpi, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ00410B

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