Azide Chemistry

Azide Chemistry encompasses bioorthogonal chemical reactions utilising azide functional groups that react selectively with strained alkynes or phosphines through strain-promoted cycloaddition or Staudinger reactions without interfering with biological functionality, enabling site-specific labelling, bioconjugation, and imaging in living systems.

The biopharmaceutical industry employs azide chemistry for site-specific antibody-drug conjugation, metabolic labelling, and research applications. Azide-containing unnatural amino acids incorporated into antibodies through genetic code expansion enable precise payload attachment at defined sites producing homogeneous conjugates with optimal drug-to-antibody ratios. Metabolic labelling with azide-containing sugars incorporates reactive handles into cell surface glycans enabling visualisation and capture of glycoproteins. Click chemistry reactions between azides and alkynes provide efficient, selective conjugation under mild aqueous conditions. As site-specific bioconjugation becomes increasingly important for next-generation antibody-drug conjugates, azide chemistry continues providing versatile, selective tools enabling precise molecular engineering.