When 2,2,3,3-tetraphenyloxirane ( ) in 1,2-dichloroethane (DCE) was passed through the ABS printed catalyst (ABS-SO3H), the rearrangement product 2,2,2-acetophenone ( ) was obtained in 97% isolated yield (Table ). After the epoxide substrate was passed through the catalyst plug, a volume of DCE was then passed through the printed catalyst. The resulting solution was then dried over sodium sulfate and the solvent removed to provide essentially pure product 2.