Following these initial studies, we sought to determine the scope of reactions possible using the printed acid catalysts. Although ABS(CF)-SO3H printed catalyst was shown to be more durable than the ABS-SO3H printed catalyst, most of the synthetic work was done with the ABS-SO3H printed catalyst, as this was somewhat easier to fabricate. Other pinacols rearrangements were accomplished with vicinal-diols. 7 For example, pinacol (5) provides 3,3-dimethyl-2butanone (4) in excellent yield as a CH2Cl2 solution (eq 1). This reaction involves ionization of an alcohol by protonation and elimination of water to the provide the carbocation. Migration of a methyl group and deprotonation then gives the obtained product . The high yield of this product indicates that the catalyst retains a relatively high level of activity despite the production of water in the reaction. Similarly, the phenyl-substituted pinacol gives the product 2 in 86% yield from the pinacol rearrangement.