Benzyl-PEG2-Tos CAS:4981-83-3 contains a benzyl protecting group and tosyl group. The benzyl protecting group can be removed via hydrogenolysis and the resulting hydroxy group can be further functionalized. The tosyl group easily undergo nucleophilic substitution and can be replaced by a variety of functional groups. The hydrophilic PEG linkers increase the solubility of the compound in aqueous media.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.