Kinetic Stabilization of Carbazole Nitroxides by Inclusion in a Macrocage and their ESR Characterization.

Some nitroxides, eg. tetramethylpyridiniumoxide (TEMPO), are known as stable radicals; however, carbazole nitroxide is less stable. The kinetic stabilization of labile radicals by introduction of bulky substituents is usually effective to investigate intrinsic properties of the molecule because of small electronic perturbation induced by the substituents. In this study, macrocage molecules with a carbazole nitroxide connected by covalent bonds were newly designed as kinetically stabilized carbazole nitroxides. The nitroxides were prepared and characterized by ESR spectroscopy. The caged nitroxides presented long half-lives (~50 h) by kinetic analysis.

• Publication year

  2019

• Venue

  Journal of Organic Chemistry

• Publication date

  2019-09-06

• Fields of study

  Medicine, Chemistry

• Identifiers
  DOI 10.1021/acs.joc.9b01686PMID 31442043
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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