t-Boc-Aminooxy-PEG-Tos is a commonly used compound in pharmaceutical research and development. This molecule contains several functional groups that make it useful for a wide range of applications. The t-Boc group is a protecting group that is commonly used in organic synthesis to protect primary amines from unwanted reactions. The aminooxy group is a functional group that is often used in bioconjugation reactions to attach biomolecules to synthetic polymers. Finally, the tosyl group is a leaving group that can be easily displaced in nucleophilic substitution reactions. These properties make t-Boc-Aminooxy-PEG-Tos an important tool for researchers who are working on the development of new pharmaceuticals. By using this compound, they can selectively protect primary amines and then attach other molecules to the aminooxy group. This can help to improve the pharmacological properties of new drugs, such as their solubility, stability, and bioavailability.