Application of mobilized gold nanoparticles as sole catalyst for the oxidation of secondary alcohols into ketones

Oxidation of alcohols into corresponding ketones is efficiently catalyzed by heterogeneous gold nanoparticles. Use of H2O2 instead of O2 (g) is the main feature of our methodology since maintaining the required pressure of O2 (g) at elevated temperature is not easy. The reaction does not require any co-catalyst. After completion of the reaction, the catalyst could be recovered by centrifugation and reused several times with only a slight decrease in activity. Thus our present protocol, which is comprised of green reagent, solvent and catalyst, is completely clean.

Figure optionsDownload high-quality image (77 K)Download as PowerPoint slideResearch highlights▶ Our present protocol, which is comprised of green regent solvent and catalyst, is completely clean. ▶ After completion of the reaction, the catalyst was recovered by centrifugation and reused several times with only a slight decrease of activity. ▶ Use of H2O2 instead of O2 (g) is the main feature of our methodology since maintaining the required pressure of O2 (g) at elevated temperature is not easy. ▶ The reaction does not require any co-catalyst. ▶ The present method explores novel application of sole Au-nanoparticles as catalyst for the oxidation.