Oxidative coupling of carboxylic acids or benzaldehydes with DMF using hydrotalicite-derived oxide catalysts

Samudrala, S, Nakhate, A, Gupta, S, Rasal, K, Deshmukh, G, Gadipelly, C, Theegala, S, Dumbre, D, Periasamy, S, Komandur, V, Bhargava, S and Mannepalli, L 2019, 'Oxidative coupling of carboxylic acids or benzaldehydes with DMF using hydrotalicite-derived oxide catalysts', Applied Catalysis B: Environmental, vol. 240, pp. 348-357.


Document type: Journal Article
Collection: Journal Articles

Title Oxidative coupling of carboxylic acids or benzaldehydes with DMF using hydrotalicite-derived oxide catalysts
Author(s) Samudrala, S
Nakhate, A
Gupta, S
Rasal, K
Deshmukh, G
Gadipelly, C
Theegala, S
Dumbre, D
Periasamy, S
Komandur, V
Bhargava, S
Mannepalli, L
Year 2019
Journal name Applied Catalysis B: Environmental
Volume number 240
Start page 348
End page 357
Total pages 10
Publisher Elsevier BV
Abstract Hydrotalcite-derived (HT-derived) oxide catalysts were synthesised from hydrotalcite-like (HT-like) materials prepared by co-precipitation method (Cu-Al, Cu-Fe, Mg-Al, Mg-Fe, Ni-Fe and Ni-Al) followed by calcination and their catalytic activity was studied for oxidative amidation of carboxylic acids and substituted benzaldehydes with N,N-dimethylformamide (DMF). Catalyst screening was done using benzoic acid and DMF as a model reaction. Subsequently, we have optimised the reaction with different reaction parameters, catalyst loading, temperatures and oxidants. Cu-Fe HT-derived oxide catalyst showed excellent activity towards oxidative amidation using TBHP as an oxidant at 80 °C in 10 h. The fresh and spent catalysts were thoroughly characterised by different analytical techniques; XRD, SEM, HRTEM, TPD, N 2 adsorption-desorption isotherm and XPS. Moreover, the catalyst was easily separated by simple filtration and reused up to four cycles without significant loss in catalytic activity.
Subject Catalysis and Mechanisms of Reactions
Keyword(s) Aldehydes
Carboxylic acid
Dimethylformamide
Heterogeneous catalyst
Oxidative coupling
DOI - identifier 10.1016/j.apcatb.2017.12.058
Copyright notice © 2017 Elsevier B.V. All rights reserved
ISSN 0926-3373
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