PEG

m-PEG11-Tos (Legacy Tebubio ref. 282T20904). M-PEG11-Tos is a PEG derivative containing a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. For nucleophilic substitution reactions, the tosyl group is a good leaving group.

Azido-PEG2-t-butyl ester (Legacy Tebubio ref. 282T20915). Azido-PEG2-t-butyl ester is a PEG derivative containing a t-butyl ester and an azide group. The hydrophilic PEG spacer increases solubility in aqueous media. Under acidic conditions, the t-butyl protected carboxyl group can be deprotected.