Synthesis 2024; 56(12): 1958-1966
DOI: 10.1055/s-0042-1751570
paper

Heptafluorobutyric Acid Catalyzed Cross-Dehydrogenative Coupling of 7-Aminocoumarins with 1,2,4-Triazines: A Straightforward Pathway to 3-Triazinyl-7-aminocoumarins

a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
,
a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
,
Ainur D. Sharapov
a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
,
Anastasia P. Potapova
a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
,
Anton N. Tsmokalyuk
a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
,
Vasiliy S. Gaviko
a   Ural Federal University, Mira 19, 620002 Ekaterinburg, Russian Federation
b   M. N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, 18 S. Kovalevskaya Str., 620108 Ekaterinburg, Russian Federation
› Author Affiliations
This work was supported by the Russian Science Foundation (grant no. 23-73-10050).


Abstract

A protocol for C–H/C–H cross-coupling reaction between 7-aminocoumarins and 1,2,4-triazines has been developed. The reaction was carried out under heptafluorobutyric acid catalysis providing products with yield up to 91%. The applicability and scope of the proposed method was demonstrated on 25 compounds containing different substituents both in the triazine ring and at the nitrogen atom of 7-aminocoumarins. The study of the reaction mechanism by EPR and radical trapping suggests that radicals are involved in this transformation.

Supporting Information



Publication History

Received: 17 January 2024

Accepted after revision: 19 February 2024

Article published online:
01 March 2024

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