Issue 10, 2023

N-Amino pyridinium salts in organic synthesis

Abstract

C–N bond forming reactions hold immense significance to synthetic organic chemistry. In pursuit of efficient methods for the introduction of nitrogen in organic small molecules, myriad synthetic methods have been developed, and methods based on both nucleophilic and electrophilic aminating reagents have received sustained research effort. In response to continued challenges – the need for substrate prefunctionalization, the requirement for vestigial N-activating groups, and the need to incorporate nitrogen in ever more complex molecular settings – the development of novel aminating reagents remains a central challenge in method development. N-Aminopyridinums and their derivatives have recently emerged as a class of bifunctional aminating reagents, which combine N-centered nucleophilicity with latent electrophilic or radical reactivity by virtue of the reducible N–N bond, with broad synthetic potential. Here, we summarize the synthesis and reactivity of N-aminopyridinium salts relevant to organic synthesis. The preparation and application of these reagents in photocatalyzed and metal-catalyzed transformations are discussed, showcasing the reactivity in the context of bifunctional platform and its potential for innovation in the field.

Graphical abstract: N-Amino pyridinium salts in organic synthesis

Article information

Article type
Review Article
Submitted
07 Feb 2023
Accepted
24 Mac 2023
First published
30 Mac 2023

Org. Chem. Front., 2023,10, 2563-2580

N-Amino pyridinium salts in organic synthesis

P. Roychowdhury, S. Samanta, H. Tan and D. C. Powers, Org. Chem. Front., 2023, 10, 2563 DOI: 10.1039/D3QO00190C

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