FAK ligand-Linker Conjugate 1 is a chemical compound designed to facilitate PROTAC-mediated protein degradation. This compound consists of a ligand specifically targeting FAK and a PROTAC linker module, which acts as a recruitment agent for E3 ligases including VHL, CRBN, MDM2, and IAP[1].
Tos-PEG4-t-butyl ester (Tos-PEG4-Boc) is a PROTAC linker characterized by its PEG composition. This compound plays a crucial role in the synthesis of a range of PROTACs, including BI-3663, a highly selective PTK2/FAK PROTAC. It employs cereblon ligands to target E3 ligases for the degradation of PTK2, exhibiting potent inhibitory activity with an IC50 of 18 nM[1].