Compounds with activity as modulators of cell adhesion are disclosed. The compounds are derivatives of piperidin-4-amine. In some embodiments, a compound can be linked to a targeting agent, a pharmaceutically active substance and/or a support material. Methods for enhancing or inhibiting classical cadherin-mediated functions are also disclosed. The compounds can be used for the treatment or prevention of a variety of diseases including cancer. Compositions and devices, including skin patches comprising a compound are also disclosed. In addition, methods of synthesis of the compounds are provided.