What question did this study set out to answer?

The aim is to explore the effects of polyfluoroalkoxy substitutions on N-substituents in triazolium NHCs for organocatalysis.

April 10, 2026

Triazolium NHCs with polyfluoroalkoxy phenyl substitutes: synthesis and preliminary application as organocatalyst

Puntos clave

The aim is to explore the effects of polyfluoroalkoxy substitutions on N-substituents in triazolium NHCs for organocatalysis.
Synthesis of triazolium NHCs with polyfluoroalkoxy phenyl groups.
Characterization using Natural Bond Orbital calculations for charge distribution and conformation.
Evaluation of enantioselectivity in various catalyzed reactions.
Polyfluoroalkoxy substitutions significantly enhance enantioselectivity in NHC-catalyzed reactions.
Improved performance observed in radical trifluoroacylation and photocatalyzed radical coupling.
Unique fluorine effects noted from N-substituents modifying electronic structures.

Resumen

The N-substituents are essential for the performance of Nheterocyclic carbene (NHC) organocatalyst. Introducing polyfluoroalkoxy groups into the N-substituents of triazolium NHCs resulted in a unique fluorine effect. Calculations of Natural Bond Orbital (NBO) charge distributions and dihedral angles validate the unique impact of the polyfluoroalkoxy groups on the electronic structure and conformation of the NHCs. Notably, this modification strategy led to remarkably enhanced enantioselectivities in various NHC-catalyzed reactions, including radical trifluoroacylation, photocatalyzed radical coupling, and electro-catalyzed dynamic kinetic resolution.

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