O
Oleg N. Chupakhin
Researcher at Russian Academy of Sciences
Publications - 6
Citations - 36
Oleg N. Chupakhin is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Nucleophilic substitution & Chemoselectivity. The author has an hindex of 2, co-authored 6 publications receiving 21 citations. Previous affiliations of Oleg N. Chupakhin include Ural Federal University.
Papers
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Journal ArticleDOI
Nucleophilic substitution of hydrogen–the Boger reaction sequence as an approach towards 8-(pyridin-2-yl)coumarins
Ramil F. Fatykhov,Maria I. Savchuk,Ekaterina S. Starnovskaya,Maria V. Bobkina,Dmitry S. Kopchuk,Dmitry S. Kopchuk,Emiliya V. Nosova,Emiliya V. Nosova,Grigory V. Zyryanov,Grigory V. Zyryanov,Igor A. Khalymbadzha,Igor A. Khalymbadzha,Oleg N. Chupakhin,Oleg N. Chupakhin,Valery N. Charushin,Valery N. Charushin,Viktor G. Kartsev +16 more
TL;DR: In this article, the Boger transformation of formed triazine moiety into the pyridine one was proposed, which achieved high yields and the absence of transition-metal catalysts.
Journal ArticleDOI
1-Nicotinoylbenzotriazole: A Convenient Tool for Site-Selective Protection of 5,7-Dihydroxycoumarins
Ramil F. Fatykhov,Igor A. Khalymbadzha,Igor A. Khalymbadzha,Oleg N. Chupakhin,Oleg N. Chupakhin,Valery N. Charushin,Valery N. Charushin,Anna K. Inyutina,Pavel A. Slepukhin,Victor G. Kartsev +9 more
TL;DR: NicBt proved useful in a gram-scale three-step preparation of a 2,2-dimethylpyrano[2,3-f]coumarin, a key intermediate for the synthesis of calanolide A, an HIV reverse transcriptase and Mycobacterium tuberculosis inhibitor, and its active analogues.
Journal ArticleDOI
Synthetic Approaches to Unsymmetrically Substituted 5,7-Dihydroxycoumarins
Ramil F. Fatykhov,Oleg N. Chupakhin,Oleg N. Chupakhin,Anna K. Inyutina,Igor A. Khalymbadzha,Igor A. Khalymbadzha +5 more
TL;DR: A review of 5,7-dihydroxycoumarins can be found in this paper with an emphasis on recent works, including the Horner-Wadsworth-Emmons reaction.
Proceedings ArticleDOI
New approach to the synthesis of biologically active derivatives of pyranocoumarins
Anna K. Inyutina,Ramil F. Fatykhov,Igor A. Khalymbadzha,Ainur D. Sharapov,Maria V. Bobkina,Oleg N. Chupakhin +5 more
TL;DR: In this article, a simple and convenient synthesis of selectively protected derivatives of 5,7-dihydroxycoumarins was proposed, based on the reaction of the coumarins with nicotinoyl azide yielding 7-nicotine-loxy derivatives of the Coumarins, an important semiproduct for synthesis of anti-HIV agents.
Proceedings ArticleDOI
Synthesis of azaheterocyclic derivatives of 5,7-dimethoxycoumarins by CH/CH functionalization with quinazolines
Ainur D. Sharapov,Ramil F. Fatykhov,Maria V. Bobkina,Anna K. Inyutina,Igor A. Khalymbadzha,Oleg N. Chupakhin +5 more
TL;DR: In this paper, a new approach was developed for nucleophilic substitution of hydrogen in quinazoline derivatives under the action of 5,7-dimethoxycoumarins.