Propargyl-PEG2-NHBoc is a cleavable ADC linker utilized for the synthesis of antibody-drug conjugates (ADCs). This PEG-based PROTAC linker, namely Propargyl-PEG2-NHBoc, holds potential for the synthesis of PROTACs[1].

ADCs are comprised of an antibody to which is attached an ADC cytotoxin through an ADC linker. PROTACs contain two different ligands connected by a linker; one is a ligand for an E3 ubiquitin ligase and the other is for the target protein. PROTACs exploit the intracellular ubiquitin-proteasome system to selectively degrade target proteins.