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Thec atalytic activity of graphene oxide supported copper oxide (CuO-GO)h as been investigated in Clicks ynthesis of 1,2,3-triazole derivatives under green reactionc onditions.I nthe context of green approach, water is useda ss olvent under ligand free and aerobic conditions at room temperature,w ith lowc atalyst loading (0.2mol %) while ensuring the recovery and reusability of the catalyst. Thec atalyst affords excellent selectivity in formation of the desired productsi ng ood to excellent yields. Further, the work-up procedure adopted here is clean ands imple,while recycling the organic solvents that one usedf or work-up procedure.I ti sp roposed that the functional groups present on the GO surface are effective for preventing the aggregation of the catalytically active copper oxide species during the reaction. Moreover, the excellent performance of CuO-GO nanocomposite is ascribed to the excellent dispersity of the catalyst in water, hydrophilic nature of the GO for the accumulation of organic substrates in water and the "Breslowe ffect."

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An efficient and green method has been developed for the synthesis of kojic acid derivatives by employing 20 mol% β-cyclodextrin in aqueous media.