Synthesis 2024; 56(08): 1309-1323
DOI: 10.1055/a-2230-0583
paper

Efficient Synthesis of Pyrido[3,4-c]cinnolines and Pyrido[3,2-c]cinnolines by Intramolecular Azo Coupling Reaction of 4,6-Diaryl-3-pyridine Diazonium Salts and Study of Their Antiviral Activity

Autoren

  • Alina Yu. Fisenko

    a   Department of Organic and Analytical Chemistry, F. M. Dostoevsky Omsk State University, 55a Mira Ave., 644077 Omsk, Russian Federation
  • Vladislav Yu. Shuvalov

    b   Laboratory of New Organic Materials, Omsk State Technical University, 11 Mira Ave., 644050 Omsk, Russian Federation
  • Evgenii V. Arshinov

    a   Department of Organic and Analytical Chemistry, F. M. Dostoevsky Omsk State University, 55a Mira Ave., 644077 Omsk, Russian Federation
  • Larisa V. Glizdinskaya

    a   Department of Organic and Analytical Chemistry, F. M. Dostoevsky Omsk State University, 55a Mira Ave., 644077 Omsk, Russian Federation
  • Larisa N. Shishkina

    c   State Research Center of Virology and Biotechnology “VECTOR”, Novosibirsk Region, 6300559 Koltsovo, Russian Federation
  • Nikolay I. Bormotov

    c   State Research Center of Virology and Biotechnology “VECTOR”, Novosibirsk Region, 6300559 Koltsovo, Russian Federation
  • Olga A. Serova

    c   State Research Center of Virology and Biotechnology “VECTOR”, Novosibirsk Region, 6300559 Koltsovo, Russian Federation
  • Galina P. Sagitullina

    a   Department of Organic and Analytical Chemistry, F. M. Dostoevsky Omsk State University, 55a Mira Ave., 644077 Omsk, Russian Federation

This work was supported by the Russian Science Foundation (grant No 23-23-00622). Virological studies were carried out with financial support from the State assignment of the State Research Centre of Virology and Biotechnology VECTOR.


Graphical Abstract

Abstract

A new method is proposed for the synthesis of pyrido[3,4-c]cinnolines and pyrido[3,2-c]cinnolines. Pyridine-3-diazonium tetrafluoroborates, containing donor methoxy groups in one of the aryl substituents, form pyridocinnolines at 0 °C by intramolecular azo coupling reaction. The 2′-methoxy group in the aryl substituent of the pyridine-3-diazonium salt participates in the aromatic nucleophilic substitution reaction, which results in the elimination of the diazo group to form benzofuro[2,3-c]pyridine and benzofuro[3,2-b]pyridine. The intermediate and target reaction products were isolated in high yields.

Supporting Information



Publikationsverlauf

Eingereicht: 01. November 2023

Angenommen: 14. Dezember 2023

Accepted Manuscript online:
18. Dezember 2023

Artikel online veröffentlicht:
24. Januar 2024

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