Synthesis 2023; 55(23): 4034-4048
DOI: 10.1055/a-2105-2850
paper

Palladium-Catalyzed Oxidative Cycloaddition of Quinazoline-2,4(1H,3H)-diones and Diarylalkynes via C–H/N–H Activation

Authors

  • Darya D. Komolova

    a   Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russian Federation
  • Yulia A. Pronina

    b   Saint-Petersburg State Institute of Technology, Moskovskii pr. 26, 190013 St. Petersburg, Russian Federation
  • Stanislav V. Lozovskiy

    c   CRAB, Case 551, Aix-Marseille Université, Avenue Escadrille Normandie-Niemen, 13397 Marseille, Cedex 20, France
    d   Institute of Organoelement compounds of Russian Academy of Sciences, Vavilova str. 28, 119334 Moscow, Russian Federation
  • Stanislav I. Selivanov

    e   Laboratory of Biomolecular NMR, Saint-Petersburg State University, 199034 St. Petersburg, Russian Federation
    b   Saint-Petersburg State Institute of Technology, Moskovskii pr. 26, 190013 St. Petersburg, Russian Federation
  • Alexander I. Ponyaev

    b   Saint-Petersburg State Institute of Technology, Moskovskii pr. 26, 190013 St. Petersburg, Russian Federation
  • Alexander S. Filatov

    a   Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russian Federation
  • Vitali M. Boitsov

    f   Saint Petersburg National Research Academic University of the Russian Academy of Sciences, ul. Khlopina 8/3, 194021, St. Petersburg, Russian Federation
  • Alexander V. Stepakov

    a   Saint-Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russian Federation
    b   Saint-Petersburg State Institute of Technology, Moskovskii pr. 26, 190013 St. Petersburg, Russian Federation

This work was supported by the Ministry of Science and Higher Education of the Russian Federation (state assignment FSEN-2023-0002). V.M.B. is grateful to the Ministry of Education and Science of the Russian Federation (project FSRM-2023-0005) for financial support. S.I.S. acknowledges Saint-Petersburg State University for a research grant 104236506.


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In commemoration of the 300th anniversary of St Petersburg State University’s founding

Abstract

The oxidative cycloaddition of 3-subsituted quinazoline-2,4(1H,3H)-diones and alkynes has been developed. The reaction is Pd(II)-catalyzed and successfully occurs in the presence of Ag(I) oxidants. This transformation is assumed to proceed by N–H palladation of the quinazoline-2,4(1H,3H)-dione followed by ortho-C–H activation. Using this methodology, a series of 5,6,7,8-tetraaryl-1H-azepino[3,2,1-ij]quinazoline-1,3(2H)-diones were obtained in moderate to good yields. The resulting tricyclic heterocycles can be converted by alkaline hydrolysis into 1H-benzo[b]azepine-9-carboxamide derivatives. DFT calculations have been carried out to shed light on the reaction mechanism.

Supporting Information



Publikationsverlauf

Eingereicht: 22. April 2023

Angenommen nach Revision: 02. Juni 2023

Accepted Manuscript online:
02. Juni 2023

Artikel online veröffentlicht:
04. Juli 2023

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