Rapid Cu-free click chemistry with readily synthesized biarylazacyclooctynones

John C. Jewett, Ellen M. Sletten, Carolyn R. Bertozzi

Research output: Contribution to journalArticlepeer-review

556 Scopus citations


"Chemical equation presented" Bioorthogonal chemical reactions, those that do not interact or interfere with biology, have allowed for exploration of numerous biological processes that were previously difficult to study. The reaction of azides with strained alkynes, such as cyclooctynes, readily forms a triazole product without the need for a toxic catalyst. Here we describe a iarylazacyclooctynone (BARAC) that has exceptional reaction kinetics and whose synthesis is designed to be both modular and scalable. We employed BARAC for live cell fluorescence imaging of azide-labeled glycans. The high signal-to-background ratio obtained using nanomolar concentrations of BARAC obviated the need for washing steps. Thus, BARAC is a promising reagent for in vivo imaging.

Original languageEnglish (US)
Pages (from-to)3688-3690
Number of pages3
JournalJournal of the American Chemical Society
Issue number11
StatePublished - Mar 24 2010

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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