The synthesis of dialkyl peroxides from alkyl hydroperoxides and alkyl bromides in the presence of polymer-supported phase-transfer catalysts has been investigated. It was revealed that polymer-bound quaternary ammonium and polyethylene glycol catalysts were more active than their soluble forms. High yields (60-92%) of the products were obtained. The catalyst could be recycled several times with no appreciable loss of activity. (c) 2006 Elsevier B.V. All rights reserved.