Journal of Medicinal Chemistry p. 1160 - 1170 (2013)
Update date:2022-09-26
Topics: Inhibitors Fragment-based discovery 1H-pyrrolo[2,3-b]- 3H-imidazolo[4,5-b]-pyridines Focal adhesion kinase
Heinrich, Timo
Seenisamy, Jeyaprakashnarayanan
Emmanuvel, Lourdusamy
Kulkarni, Santosh S.
Bomke, J?rg
Rohdich, Felix
Greiner, Hartmut
Esdar, Christina
Krier, Mireille
Gr?dler, Ulrich
Musil, Djordje
Focal adhesion kinase (FAK) is considered as an attractive target for oncology, and small-molecule inhibitors are reported to be in clinical testing. In a surface plasmon resonance (SPR)-mediated fragment screening campaign, we discovered bicyclic scaffolds like 1H-pyrazolo[3,4-d]pyrimidines binding to the hinge region of FAK. By an accelerated knowledge-based fragment growing approach, essential pharmacophores were added. The establishment of highly substituted unprecedented 1H-pyrrolo[2,3-b]pyridine derivatizations provided compounds with submicromolar cellular FAK inhibition potential. The combination of substituents on the bicyclic templates and the nature of the core structure itself have a significant impact on the compounds FAK selectivity. Structural analysis revealed that the appropriately substituted pyrrolo[2,3-b]pyridine induced a rare helical DFG-loop conformation. The discovered synthetic route to introduce three different substituents independently paves the way for versatile applications of the 7-azaindole core.
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