bi 4464

BI-4464 is a highly selective inhibitor targeting focal adhesion kinase (FAK). BI-4464 effectively blocks the catalytic activity of FAK by competitively binding to the ATP-binding site, with an IC₅₀ of 17 nM. In addition to its role as a kinase inhibitor, BI-4464 can also serve as a FAK-targeting ligand (warhead) for PROTAC design. By conjugation with an E3 ligase ligand via an appropriate linker, the resulting PROTAC molecule can induce the selective degradation of FAK through the ubiquitin–proteasome pathway, providing a valuable tool for cancer biology and related disease research.

BI-3663 is a highly selective PTK2/FAK PROTAC that utilizes cereblon ligands to hijack E3 ligases for PTK2 degradation, with an IC50 of 18 nM. It is composed of BI-4464 linked to Pomalidomide with a linker[1]. Anti-cancer.