An aminomethyl polystyrene resin supported tin complex (PS-Sn) catalyst was prepared by a simple procedure and found to be an active and selective catalyst for the Baeyer-Villiger (B-V) oxidation of cyclic and acyclic ketones including 2-adamantanone, 2-methylcyclohexanone, cyclohexanone, 2-tert-butylcyclohexanone, 4-tert-butylcyclohexanone, 4-methylcyclohexanone, 3-methyl-2-pentanone, 4-methyl-2-pentanone, and cyclopentanone using 30% hydrogen peroxide as oxidant. (c) 2006 Elsevier B.V. All rights reserved.