Provided are compounds having an inhibitory effect on Mixed Lineage Kinases. The compounds include substituted pyrrolo[2,3-b]pyridines having Formula IX Also provided are pharmaceutical compositions, methods of preparing the compounds, synthetic intermediates, and methods of using the compounds, independently or in combination with other therapeutic agents, for treating diseases and conditions which are affected by Mixed Lineage Kinase inhibition. Also provided are methods of treatment neuropsychiatric disorders which comprise the inhibition of Mixed Lineage Kinases.