Journal
APPLIED CATALYSIS A-GENERAL
Volume 596, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2020.117516
Keywords
Suzuki miyaura reaction; Palladium catalyst; Pd-coated honeycomb; Ligand-free conditions; Aerobic conditions; Arylboronic acids
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Funding
- SERB, New-Delhi [EMR/2016/006358]
- Indian Institute of Science
- CSIR, New-Delhi
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We synthesized a recyclable palladium ionic catalyst, Ti0.97Pd0.03O1.97, using a solution combustion method (SCM), and characterized by XRD and Rietveld refinement. The synthesized Pd ionic catalyst is stable, insensitive to moisture and air, and easy to handle. The new catalyst has exhibited a phenomenal result for the Suzuki-Miyaura cross-coupling reaction with a broad substrate scope, and the reaction proceeds in an aqueous medium. The new catalyst proved beneficial and produced excellent yields irrespective of aryl halide used in the reaction (electron-rich or electron-poor or heterocyclic compounds) and shown a turnover frequency (TOF) of 14-25 h(-1) for different reactions. The catalyst was coated on a cordierite monolith (Mg2Al4Si5O18), which enhanced the applicability of the catalyst, and made the handling and recycling of the catalyst very easy. Suzuki Miyaura reaction was carried out using both Pd-powder catalysts as well as the Pd-coated honeycomb, which gave almost similar results. We have demonstrated the recyclability of Pd coated cordierite monolith and shown the superiority of the catalyst over the other Pd catalysts for the Suzuki-Miyaura reaction.
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