Propargyl-PEG1-acid is a PEG-based PROTAC linker can be used in the synthesis of BTK-CRBN PROTACs Ibrutinib-based PROTAC 4 and PROTAC 5. PROTAC 5 causes the degradation of BTK and induces the degradation of CSK, LYN, and LAT2 at 10 μM[1].
BTK-CRBN PROTACs act as stoichiometric degraders, resulting in degradation of BTK protein. Degradation of BTK is a result of cereblon E3 ligases family recruitment[1].
















