Azidoacetic Acid CAS:18523-48-3 is a simple azido-containing building block that can be used to modify primary amines in the presence activators (e.g. EDC, or DCC) with azide (N3) group through a stable amide bond for subsequent ligation to terminal alkynes, strained cyclooctynes (e.g. DBCO or BCN compounds) or phosphine-labeled molecules. A short spacer arm adds minimal mass to modified molecules.
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