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Note | Regular issue | Vol 75, No. 3, 2008, pp.669-673
Published online, 7th December, 2007
DOI: 10.3987/COM-07-11248
Silica Sulfuric Acid-Activated Poly-1,3,-dichloro-5-methyl-5(4’-vinylphenyl)hydantoin (PDCVH) as an Effective Reagent for Oxidation of 1,3,5-Trisubstituted 2-Pyrazolines Both under Microwave Irradiation and Thermal Condition

Davood Azarifar,* Behrooz Maleki, and Mehrnaz Setayeshnazar

*Faculty of Chemistry, Bu-Ali Sina University, Zip Code 65178, Hamedan, Iran

Abstract

Oxidation of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles to the corresponding pyrazoles has been achieved by utilizing silica sulfuric acid-activated poly-1,3-dichloro-5-methyl-5(4’-vinylphenyl)hydantoin in EtOH under both microwave irradiation and conventional thermal condition at room temperature with good yields.