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t-Boc-N-amido-PEG1-acid is a PEG linker containing a terminal carboxylic acid and Boc-protected amino group. The hydrophilic PEG spacer increases solubility in aqueous media. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The Boc group can be deprotected under mild acidic conditions to form the free amine.

Boc-NH-PEG1-CH2CH2COOH is a cleavable ADC linker containing 1 unit PEG, and also a PROTAC linker, belonging to the PEG and Alkyl/ether classes, which can be used for the synthesis of antibody-drug conjugates (ADC) and PROTACs .

PEGs

Alkyl/ether

Cleavable