The Traf2- and Nck-interacting protein kinase (TNIK) is a downstream signal protein of the Wnt/β-catenin pathway and has been thought of as a potential target for the treatment of colorectal cancer. SAR analysis leads to the identification of a number of potent TNIK inhibitors with Compound 21k being the most active one. Preliminary assessment for the pharmacokinetic properties of Compound 21k was carried out through services provided by Medicilon.