A Bioorthogonal Reaction of N‐Oxide and Boron Reagents. Issue 52 (16th November 2015)

• Record Type: Journal Article
• Authors: Kim, Justin; Bertozzi, Carolyn R.
• Is Part Of: Angewandte Chemie international edition. Volume 54:Issue 52(2015)
• Page Start: 15777
• Page End: 15781
• Publication Date: 2015-11-16
• Subjects: bioorthogonal chemistry -- diboron reagents -- N‐oxides -- small‐molecule activation -- uncaging; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201508861
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The development of bioorthogonal reactions has classically focused on bond‐forming ligation reactions. In this report, we seek to expand the functional repertoire of such transformations by introducing a new bond‐cleaving reaction between N ‐oxide and boron reagents. The reaction features a large dynamic range of reactivity, showcasing second‐order rate constants as high as 2.3×10 3 M −1 s −1 using diboron reaction partners. Diboron reagents display minimal cell toxicity at millimolar concentrations, penetrate cell membranes, and effectively reduce N ‐oxides inside mammalian cells. This new bioorthogonal process based on miniscule components is thus well‐suited for activating molecules within cells under chemical control. Furthermore, we demonstrate that the metabolic diversity of nature enables the use of naturally occurring functional groups that display inherent biocompatibility alongside abiotic components for organism‐specific applications. Abstract : The bond‐cleaving reaction between N ‐oxide and diboron reagents features second‐order rate constants as high as 2.3×10 3 M −1 s −1 . Diboron reagents display minimal cell toxicity at millimolar concentrations, penetrate cell membranes, and reduce N ‐oxides inside mammalian cells. This new bioorthogonal reaction is thus well‐suited for chemically activating molecules within cells.