Synthesis of 4-hydroxy-5-methyl-2-[2-(4-oxo-4H-chromen-3-yl)ethenyl]-6H-1,3-oxazin-6-ones and their reaction with hydrazine
- Authors: Chernov N.M.1, Klyukin A.S.1, Ksenofontova G.V.1, Shchegolev A.E.1, Yakovlev I.P.1
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Affiliations:
- St. Petersburg State Chemical Pharmaceutical Academy
- Issue: Vol 87, No 5 (2017)
- Pages: 952-956
- Section: Article
- URL: https://journals.rcsi.science/1070-3632/article/view/219700
- DOI: https://doi.org/10.1134/S1070363217050103
- ID: 219700
Cite item
Abstract
4-Hydroxy-6H-1,3-oxazin-6-ones containing a 3-vinylchromone fragment in the 2-position were synthesized. The direction of their reactions with hydrazine hydrate was found to depend on the solvent nature. The reaction in protic solvents (methanol, acetic acid) resulted in recyclization of both oxazine ring to 1,2,4-triazole and pyranone ring to pyrazole. Aprotic acetonitrile favored attack of hydrazine exclusively on the oxazine ring, while the 3-vinylchromone fragment remained intact.
About the authors
N. M. Chernov
St. Petersburg State Chemical Pharmaceutical Academy
Author for correspondence.
Email: nikita.chernov@pharminnotech.com
Russian Federation, ul. Professora Popova 14A, St. Petersburg, 197376
A. S. Klyukin
St. Petersburg State Chemical Pharmaceutical Academy
Email: nikita.chernov@pharminnotech.com
Russian Federation, ul. Professora Popova 14A, St. Petersburg, 197376
G. V. Ksenofontova
St. Petersburg State Chemical Pharmaceutical Academy
Email: nikita.chernov@pharminnotech.com
Russian Federation, ul. Professora Popova 14A, St. Petersburg, 197376
A. E. Shchegolev
St. Petersburg State Chemical Pharmaceutical Academy
Email: nikita.chernov@pharminnotech.com
Russian Federation, ul. Professora Popova 14A, St. Petersburg, 197376
I. P. Yakovlev
St. Petersburg State Chemical Pharmaceutical Academy
Email: nikita.chernov@pharminnotech.com
Russian Federation, ul. Professora Popova 14A, St. Petersburg, 197376