Zobrazeno 1 - 10 of 544 pro vyhledávání: '"A. L. Ioffe"'
1
Akademický článek
Diels–Alder reaction of β-fluoro-β-nitrostyrenes with cyclic dienes
Autor: Savva A. Ponomarev, Roman V. Larkovich, Alexander S. Aldoshin, Andrey A. Tabolin, Sema L. Ioffe, Jonathan Groß, Till Opatz, Valentine G. Nenajdenko
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 17, Iss 1, Pp 283-292 (2021)
The Diels–Alder reaction of β-fluoro-β-nitrostyrenes with cyclic 1,3-dienes was investigated. A series of novel monofluorinated norbornenes was prepared in up to 97% yield. The reaction with 1,3-cyclohexadiene permits the preparation of monofluor
Externí odkaz: https://doaj.org/article/44e21075ae3d4f0bb200ba3830fbd415
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2
Akademický článek
[3+3]-Annulation of Cyclic Nitronates with Vinyl Diazoacetates: Diastereoselective Synthesis of Partially Saturated [1,2]Oxazino[2,3-b][1,2]oxazines and Their Base-Promoted Ring Contraction to Pyrrolo[1,2-b][1,2]oxazine Derivatives
Autor: Yulia A. Antonova, Yulia V. Nelyubina, Sema L. Ioffe, Andrey A. Tabolin
Publikováno v: Molecules, Vol 28, Iss 7, p 3025 (2023)
A rhodium(II)-catalyzed reaction of cyclic nitronates (5,6-dihydro-4H-1,2-oxazine N-oxides) with vinyl diazoacetates proceeds as a [3+3]-annulation producing bicyclic unsaturated nitroso acetals (4a,5,6,7-tetrahydro-2H-[1,2]oxazino[2,3-b][1,2]oxazine
Externí odkaz: https://doaj.org/article/0d141a4d92e24046ba6f82e262204457
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4
Akademický článek
Conjugated nitrosoalkenes as Michael acceptors in carbon–carbon bond forming reactions: a review and perspective
Autor: Yaroslav D. Boyko, Valentin S. Dorokhov, Alexey Yu. Sukhorukov, Sema L. Ioffe
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 13, Iss 1, Pp 2214-2234 (2017)
Despite of their chemical instability and high reactivity, conjugated nitrosoalkenes are useful intermediates in target-oriented organic synthesis. The present review deals with carbon–carbon bond forming reactions involving Michael addition to α-
Externí odkaz: https://doaj.org/article/7de863303bc5433fa7c5f1e3fe2c09e6
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7
Akademický článek
An Easy Synthesis of Monofluorinated Derivatives of Pyrroles from β-Fluoro-β-Nitrostyrenes
Autor: Alexander S. Aldoshin, Andrey A. Tabolin, Sema L. Ioffe, Valentine G. Nenajdenko
Publikováno v: Molecules, Vol 26, Iss 12, p 3515 (2021)
The catalyst-free conjugate addition of pyrroles to β-Fluoro-β-nitrostyrenes was investigated. The reaction was found to proceed under solvent-free conditions to form 2-(2-Fluoro-2-nitro-1-arylethyl)-1H-pyrroles. The effectiveness of this approach
Externí odkaz: https://doaj.org/article/701b8037b5974b33b851c0dc691d0dd1
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9
Akademický článek
Construction of bis-, tris- and tetrahydrazones by addition of azoalkenes to amines and ammonia
Autor: Artem N. Semakin, Aleksandr O. Kokuev, Yulia V. Nelyubina, Alexey Yu. Sukhorukov, Petr A. Zhmurov, Sema L. Ioffe, Vladimir A. Tartakovsky
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 12, Iss 1, Pp 2471-2477 (2016)
Exhaustive Michael-type alkylations of amines and ammonia with azoalkenes (generated from α-halohydrazones) were demonstrated as an efficient approach to poly(hydrazonomethyl)amines – a novel class of polynitrogen ligands. An intramolecular cyclot
Externí odkaz: https://doaj.org/article/06c80b8b0f8045d1a9535c841deeafd5
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10
Oxidative [3+2]-annulation of nitroalkenes and azolium ylides in the presence of Cu(ii): efficient synthesis of [5,5]-annulated N-fused heterocycles
Autor: Andrey A. Tabolin, Sema L. Ioffe, Vladimir A. Motornov
Publikováno v: New Journal of Chemistry. 46:4134-4141
A facile synthesis of [5,5]-annulated N-fused heterocycles – pyrrolo[2,1-b]thiazoles and pyrrolo[1,2-b]indazoles via Cu(II)-mediated oxidative [3+2]-annulation between nitroalkenes and azolium ylides was developed. The reaction proceeds in mild con
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::399b6b031471784e4c5cd6ac0643740a
https://doi.org/10.1039/d1nj05332a
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