Abstract
The development of efficient, cost-effective, and environmentally friendly catalysts is pivotal in fine chemical synthesis. In this study, an impregnating approach was used to obtain copper oxide-modified SBA-15 as an efficient catalyst for the synthesis of caprolactone from cyclohexanone with molecular oxygen as an oxidant and benzaldehyde as a sacrificial agent. The influence of experimental factors such as solvents, copper loading, substrate-to-oxidant mole ratio, temperature, and reaction duration on substrate conversion and selectivity to caprolactone was also investigated. Under the optimal reaction conditions, a cyclohexanone conversion of 63% was observed with a selectivity higher than 96% after a duration of 6 h at 50 °C. Catalyst recovery could be achieved by simple filtration and reused at least four times without a significant loss in conversion and selectivity.
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Acknowledgements
The authors are thankful for providing fellowship to Athira.M.P. The financial support from UGC SAP, DST- PURSE, RUSA 2.0 and SMNRI, CUSAT for general facility creation is acknowledged. The analytical service provided by STIC, CUSAT is also acknowledged.
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The first author is AMP: She planned the scheme, worked on it, and then wrote the manuscript. AR: contributed to the characterization of the synthesized samples. The works corresponding author, SH: assisted in its creation and wrote the manuscript.
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Athira, M.P., Arun, R. & Haridas, S. CuO impregnated SBA-15; an efficient catalyst for B–V oxidation of cyclohexanone to caprolactone. J Porous Mater 31, 305–316 (2024). https://doi.org/10.1007/s10934-023-01514-3
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DOI: https://doi.org/10.1007/s10934-023-01514-3