Goswami, Karan and Das, Dipak and Bera, Parthasarathi and Roy, Sounak and Seikh, Md Motin and Sinha, Prasanta Kumar and Gayen, Arup (2024) One-pot synthesis of ligand-free highly active Pd catalyst supported on NiFe spinel oxide for Suzuki Miyaura cross-coupling reaction. Journal of Molecular Structure, 1299. pp. 136-137. ISSN 0022-2860

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Abstract

This work underscores the development of an easily separable, very simple yet highly active heterogeneous Pd catalyst supported on Ni Fe spinel oxide containing a low percentage of noble metal Pd (only 1 at.) enabling the access to an advanced set of catalysts for SuzukiâMiyaura carbonâ carbon (CC) cross-coupling reaction that are not easily accessible with homogeneous catalysts. A series of catalytic experiments have revealed optimum reaction conditions for CC coupling between aryl bromide and phenyl boronic acid. Among a set of prepared catalysts, NiPdFe-1 (Ni/Pd molar ratio=1:1) is found to be the most active catalyst for the coupling reaction completing in just about 30 min under mild reaction conditions like 100 °C using Na2CO3 as the base in a very common organic solvent, DMF. Interaction between the oxide support and Pd(0) makes the Pd surface more electron-rich which accelerates the rate-determining step of the CC coupling reaction by faster electron transfer from Pd(0) to the aryl halides. Moreover, the catalyst is essentially heterogeneous, stable, magnetically separable and durable for several cycles without losing its activity. Good to excellent isolated yields have been obtained with a variety of functionalities on both the aryl bromide and phenyl boronic acid with varying electronic properties.

Item Type:	Article
Uncontrolled Keywords:	Palladium, Nickel, Iron oxide, Solution combustion, Suzuki Miyaura cross-coupling, Recyclable heterogeneous catalyst
Subjects:	Basic Science
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Ms Upasana Sahu
Date Deposited:	02 May 2024 09:34
Last Modified:	02 May 2024 09:34
URI:	http://cgcri.csircentral.net/id/eprint/5695

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