🔬 Discovery

Click chemistry (CuAAC)

Química click (cicloadición azida-alquino catalizada por cobre)

Date
2001-2002 · confidence high
Place
Scripps Research Institute, La Jolla, California; University of Southern Denmark, Odense (Meldal)
Credited to
K. Barry Sharpless (concept, 2001); Morten Meldal and Sharpless-Fokin (CuAAC, 2002); Carolyn Bertozzi (bioorthogonal chemistry)
People
👤 Hartmuth C. Kolb1964–👤 Karl Barry Sharpless1941–👤 M. G. Finn1958–
Field
Matter & energy

⚠️ Disputed: the sources disagree.

What was discovered

Modular, fast, selective reactions that join molecular building blocks under mild conditions, such as the azide-alkyne cycloaddition; Bertozzi takes it copper-free into living cells (bioorthogonal chemistry).

Nobel Prize in Chemistry 2022 (Sharpless, Meldal, Bertozzi). Meldal and Sharpless-Fokin independently discovered CuAAC in 2002.

What it led to

  • Bioconjugation and drug conjugates
  • Functional materials
  • Chemistry inside living organisms

Built on

  • Huisgen cycloaddition (1960s)
  • copper catalysis

Made possible

  • antibody-drug conjugates
  • in vivo glycan labelling

📄 Original publication

Click Chemistry: Diverse Chemical Function from a Few Good ReactionsHartmuth C. Kolb, M. G. Finn, K. Barry Sharpless · Angewandte Chemie International Edition · 2001

Links

Sources✓ verified 2026-09-25