Issue 3, 2018

A direct synthetic method for (nitronyl nitroxide)-substituted π-electronic compounds via a palladium-catalyzed cross-coupling reaction with a zinc complex

Abstract

We have developed an efficient synthetic method for (nitronyl nitroxide)-substituted (NN-substituted) π-electronic compounds via palladium-catalyzed cross-coupling reactions with a zinc complex of the parent nitronyl nitroxide radical anion. Various aryl iodides can be directly converted to the desired coupling compounds with high efficiency. The utility of the present method has been demonstrated by direct synthesis of a newly prepared radical species, NN-substituted phenothiazine 15P, which could not be obtained from the corresponding aldehyde compound by typical condensation-oxidation methods. The molecular structure and characteristic electronic nature of 15P were examined by single-crystal X-ray diffraction analysis and cyclic voltammetry, indicating that 15P is a promising candidate as a precursor for a triplet ground state species by one-electron oxidation.

Graphical abstract: A direct synthetic method for (nitronyl nitroxide)-substituted π-electronic compounds via a palladium-catalyzed cross-coupling reaction with a zinc complex

Supplementary files

Article information

Article type
Research Article
Submitted
07 Des 2017
Accepted
17 Jan 2018
First published
18 Jan 2018

Mater. Chem. Front., 2018,2, 591-596

A direct synthetic method for (nitronyl nitroxide)-substituted π-electronic compounds via a palladium-catalyzed cross-coupling reaction with a zinc complex

S. Suzuki, F. Nakamura and T. Naota, Mater. Chem. Front., 2018, 2, 591 DOI: 10.1039/C7QM00565B

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