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Stereodynamics of some pyridoxine derivatives

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dc.contributor.author Rakhmatullin I.
dc.contributor.author Galiullina L.
dc.contributor.author Balandina A.
dc.contributor.author Garipov M.
dc.contributor.author Strelnik A.
dc.contributor.author Galiullina A.
dc.contributor.author Shtyrlin Y.
dc.contributor.author Klochkov V.
dc.date.accessioned 2018-09-19T20:35:08Z
dc.date.available 2018-09-19T20:35:08Z
dc.date.issued 2017
dc.identifier.issn 0749-1581
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/143041
dc.description.abstract Copyright © 2016 John Wiley & Sons, Ltd.The conformational properties of three pyridoxine derivatives were studied by 1H dynamic NMR spectroscopy. Conformational exchange caused by a rotation of 2-nytrophenyl group around one single C–C bond, of 2,4-dinitrophenyl substituent around two single C–O bonds, and twist-twist transformations of the seven-membered ketal cycle was observed by NMR experiments at low temperatures. Meanwhile, the conformational exchange of the acetal ring remains fast in the NMR timescale even at 198 K. The energy barriers for all observed conformational exchange processes were determined by the lineshape analysis of dynamic NMR spectra. The activation barriers of the 2-nitrophenyl group rotation were almost the same for all studied compounds, about 40–41 kJ/mol. The energy barriers of the conformational exchange processes of the 2,4-nitrophenyl group and the ketal cycle increased significantly up to 10 kJ/mol in comparison with previously studied compounds with similar structure. Copyright © 2016 John Wiley & Sons, Ltd.
dc.relation.ispartofseries Magnetic Resonance in Chemistry
dc.subject 2D NOESY NMR
dc.subject conformational exchange
dc.subject dynamic H NMR 1
dc.subject energy barrier
dc.subject pyridoxine
dc.title Stereodynamics of some pyridoxine derivatives
dc.type Article
dc.relation.ispartofseries-issue 4
dc.relation.ispartofseries-volume 55
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 304
dc.source.id SCOPUS07491581-2017-55-4-SID85014868987


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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