A Pim kinase inhibitor compound having the structure represented by Formula I, and isomers, diastereomers, enantiomers, tautomers, and pharmaceutically acceptable salts thereof. The compounds significantly inhibit Pim kinase activity and can be used to prepare drugs for treating Pim kinase mediated diseases, such as cancers, autoimmune diseases, allergic reactions, or organ transplant rejection. Also provided are methods for preparing the compounds represented by Formula I.