t-Boc-Aminooxy-PEG5-azide

t-Boc-Aminooxy-PEG5-azide is a PEG5 compound with an azide group and Boc-protected amino group. It is reactive with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The Boc group can be deprotected under mild acidic conditions to form the free amine. The hydrophilic PEG spacer increases solubility in aqueous media.