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A Strain-Promoted [3 + 2] Azide−Alkyne Cycloaddition for Covalent Modification of Biomolecules in Living Systems

Agard, Nicholas J., Prescher, Jennifer A., Bertozzi, Carolyn R.·2004·Journal of the American Chemical Society

Abstract

Selective chemical reactions that are orthogonal to the diverse functionality of biological systems have become important tools in the field of chemical biology. Two notable examples are the Staudinger ligation of azides and phosphines and the Cu(I)-catalyzed [3 + 2] cycloaddition of azides and alkynes ("click chemistry"). The Staudinger ligation has sufficient biocompatibility for performance in living animals but suffers from phosphine oxidation and synthetic challenges. Click chemistry obviates the requirement of phosphines, but the Cu(I) catalyst is toxic to cells, thereby precluding in vivo applications. Here we present a strain-promoted [3 + 2] cycloaddition between cyclooctynes and azides that proceeds under physiological conditions without the need for a catalyst. The utility of the reaction was demonstrated by selective modification of biomolecules in vitro and on living cells, with no apparent toxicity.

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Authors
Agard, N. J., Prescher, J. A., & Bertozzi, C. R.
Venue
Journal of the American Chemical Society
Published
2004-11-01
Volume
126
Issue
46
Pages
15046-15047
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1968222033
Cited by
3,017
References
0
FWCI
14.83
Type
journal article
Language
en
Open access
closed

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.