Efficient Synthesis of Amides Over Cu–Fe Decorated Multiwalled Carbon Nanotubes and Mesoporous Carbon Catalysts
A mixture of Cu (10%) and Fe (1 to 9%) was deposited on multiwalled carbon nanotubes (MWCNTs) and mesoporous carbon (MC). The catalytic activity was investigated in a reaction between carboxylic acids/esters and aromatic amines. The physico-chemical properties of the materials were
characterized by different analytical techniques such as powder XRD (X-ray diffraction), BET (brunauer emmett teller) surface area, XPS (X-ray photoelectron spectroscopy), TPD-NH3 (thermal desorption spectroscopy), SEM-EDS (scanning electron microscopy—energy dispersive spectroscopy)
and TEM (transmission electron microscopy). The catalytic activity was investigated in the synthesis of aliphatic and aromatic amides from aliphatic/aromatic carboxylic acids and esters with aniline/benzyl amine. The yields of the product/s were in the range 30 to 92% with 100% selectivity.
The percentage yield of amides from esters was found to be less than that of corresponding acids. Cu along with 5% of Fe supported on MWCNTs was found to be a better catalyst than when supported on MC, with respect to the isolated yield of the product/s and recyclability. The catalytic activity
of the materials had a good correlation with their surface acidity. A plausible reaction mechanism has been proposed.
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Ester-Amide Exchange Reaction;
Document Type: Research Article
Centre for Incubation Innovation Research and Consultancy (CIIRC), Jyothy Institute of Technology Campus, Tataguni Off Kanakapura Road, Bengaluru 560082, Karnataka, India
Department of Chemistry, St. Joseph’s College P.G. Centre, 46, Langford Road, Shanthinagar, Bengaluru 560027, Karnataka, India
Publication date: February 1, 2020
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