J. Iran. Chem. Soc., Vol. 8, No. 4 December 2011, pp.1019~1029.

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Highly Efficient Epoxidation of Alkenes with Sodium Periodate Catalyzed by Reusable Polystyrene-Bound Ruthenium(III) Salophen

M. Moghadama,*, V. Mirkhania,*, S. Tangestaninejada, I. Mohammadpoor-Baltorka, H. Kargarb, I. Sheikhshoaeic and M. Hatefid

aDepartment of Chemistry, Catalysis Division, University of Isfahan, Isfahan 81746-73441, Iran
bDepartment of Chemistry, Payame Noor University,P.O. Box 19395-3697 Tehran, Islamic Republic of Iran
 cDepartment of Chemistry, Shahid Bahonar University, Kerman, Iran
dDepartment of Chemistry, Faculty of Science, Vali-e-Asr University, 77176 Rafsanjan, Iran

      In this paper, highly efficient epoxidation of alkenes catalyzed by ruthenium(III) salophen chloride, [Ru(salophen)Cl], supported on functionalized chloromethylated polystyrene, PS, is reported. The PS was modified with 1,4-diaminobenzene, 4-aminophenol and 4-aminothiophenol, and [Ru(salophen)Cl] was attached to the supports via axial ligation. The prepared catalysts were used for efficient epoxidation of alkenes with NaIO4 at room temperature. These new heterogenized catalysts were characterized by elemental analysis, FT-IR spectroscopy, scanning electron microscopy and transmission electron microscopy. The heterogeneous catalysts were reusable in the oxidation reactions and were reused several times.

Keywords: Ruthenium(III) salophen, Alkene epoxidation, Sodium periodate, Polystyrene, Heterogeneous catalysts

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