Synthesis and Structure-Activity Relationships of a Novel Series of Pyrimidines As Potent Inhibitors of TBK1/IKKε Kinases.

The design, synthesis and structure–activity relationships of a novel series of 2,4-diamino-5-cyclopropyl pyrimidines is described. Starting from BX795, originally reported to be a potent inhibitor of PDK1, we have developed compounds with improved selectivity and drug-like properties. These compounds have been evaluated in a range of cellular and in vivo assays, enabling us to probe the putative role of the TBK1/IKKε pathway in inflammatory diseases.