J. Iran. Chem. Soc., Vol. 7, No. 2 June 2010, pp.351~358.

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Green and Diasteroselective Oxidative Cyclization of Bisnaphthols to Spirans

A. Alizadeh*, M.M. Khodaei* and K.H. Moradi

Department of Chemistry, Razi University, Kermanshah 67149, IR, Iran

Hydrogen peroxide/MoO3, as an efficient and clean oxidizing system was used to afford diasteroselective oxidative cyclization of bisnaphthols to spirans in ethanol at 60 °C with high yields. Bisnaphthols were prepared by the reaction of a series of aldehydes and 2-naphthol in the presence of a catalytic amount of H3[P(Mo3O10)4].nH2O (HPA) in refluxing dichloromethane.

Keywords: Bisnaphtols, Spirans, MoO3, Hydrogen peroxide, HPA

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