Axispharm offers you high purity tert-butyl (11-aminoundecyl)carbamate that can be used as a PROTAC linker in PROTAC synthesis and other conjugation applications. It has an alkane chain with a terminal amine and a Boc protected amino group. Amine groups react with carboxylic acids, activated NHS esters, carbonyl groups (ketones, aldehydes), etc. The Boc group can be deprotected under mild acidic conditions to form the free amine.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.