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CeO2 nanoparticles have been used as an efficient catalyst for the preparation of C-tethered bispyrazol-5-ols by pseudo five-component reaction of phenylhydrazine, acetylenedicarboxylates, and aromatic aldehydes at 70 °C in water. The use of no hazardous organic solvent, as well as atom economy, short reaction times, little catalyst loading and high yields of products are some of the important features...
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