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  1. No Access

    Article

    Synthesis of 5,5-Disubstituted N-Methyl-1,3-oxazinanes Containing Monoterpene Fragments

    A new method has been developed for the synthesis of 5,5-disubstituted N-methyl-1,3-oxazinanes as a mixture of diastereomers at the 5-position containing monoterpene and branched alkyl substituents in the 5-posit...

    I. V. Nechepurenko, K. P. Volcho… in Doklady Chemistry (2023)

  2. No Access

    Article

    A New Approach to the Synthesis of Diethyl 2,3-Diisobutylsuccinate, a Component of Titanium–Magnesium Catalysts for Propylene Polymerization

    A procedure was developed for preparing 2,3-dialkyl-substituted succinates by condensation of a succinic acid diester with two isobutyraldehyde molecules, followed by esterification and hydrogenation of the su...

    I. V. Nechepurenko, I. Ya. Mainagashev… in Russian Journal of Applied Chemistry (2021)

  3. No Access

    Article

    Synthesis, hypolipidemic and antifungal activity of tetrahydroberberrubine sulfonates

    The paper describes the synthesis of new tetrahydroberberrubine derivatives containing polyfl uorophenyl- or alkylsulfonate groups at the O(9) position as well as those containing or not containing a bromine a...

    I. V. Nechepurenko, E. D. Shirokova, M. V. Khvostov… in Russian Chemical Bulletin (2019)

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    Article

    Hypolipidemic Berberine Derivatives with a Reduced Aromatic Ring C

    A series of aromatic and reduced berberine derivatives were synthesized. Their hypocholesterolemic activity was studied in vitro and in vivo. As a rule, berberine derivatives containing a...

    I. V. Nechepurenko, U. A. Boyarskikh, M. V. Khvostov… in Chemistry of Natural Compounds (2015)

  5. No Access

    Article

    Synthesis of berberine bromide analogs containing tertiary amides of acetic acid in the 9-O-position

    9-O-Acetamide analogs of berberine bromide were prepared in 20–87% yields via reaction of the isoquinoline alkaloid berberrubine with tertiary amides of bromoacetic acid. Aminolysis did not occur during reaction ...

    I. V. Nechepurenko, N. I. Komarova, V. G. Vasil’ev… in Chemistry of Natural Compounds (2013)

  6. No Access

    Article

    LDLR up-regulatory activity of berberine and its bromo and iodo derivatives in human liver HepG2 cells

    I. V. Nechepurenko, U. A. Boyarskikh, N. I. Komarova, M. P. Polovinka… in Doklady Chemistry (2011)

  7. No Access

    Article

    Isolation and identification of 4′,6-dimethoxy-7-hydroxyisoflavone from roots of Hedysarum theinum cultivated in vitro

    I. V. Nechepurenko, N. I. Komarova, I. N. Kuzovkina… in Chemistry of Natural Compounds (2009)

  8. No Access

    Article

    Structure of oligomeric proanthocyanidines from Hedysarum thienum roots studied by thiolysis and MALDI-TOF MS

    Oligomeric proanthocyanidines from Hedysarum theinum roots that were cleaved by benzylmercaptan were shown to be heterogeneous mixtures consisting of prodelphinine and procyanidine structural units with the fo...

    I. V. Nechepurenko, N. I. Komarova, Yu. V. Gerasimova… in Chemistry of Natural Compounds (2009)

  9. No Access

    Article

    Synthetic transformations of higher terpenoids: XVIII. Synthesis of optically active 9,10-anthraquinone derivatives

    Retro-Diels-Alder decomposition of dodecahydro-endo-4b,12-ethenochrysene-1,4-diones obtained from a tricyclic diterpenoid, levopimaric acid, gave optically active 5-[2-(6-vinyl-2,6-dimethyl-2-carboxycyclohexyl) e...

    E. E. Shul’ts, D. S. Oleinikov, I. V. Nechepurenko… in Russian Journal of Organic Chemistry (2009)

  10. No Access

    Article

    Low-molecular-weight phenolic compounds from Hedysarum theinum roots

    Isoflavonoids (−)-medicarpin, (−)-vestitol, formononetin, 8-hydroxydaidzein, and 6″-O-acetylononin were isolated for the first time in addition to (−)-catechin, (−)-epicatechin, protocatechoic acid, raspberry ket...

    I. V. Nechepurenko, M. P. Polovinka, N. I. Komarova… in Chemistry of Natural Compounds (2008)

  11. No Access

    Article

    Components of the ethylacetate extract of Hedysarum theinum roots

    Isoflavonoids (-)-medicarpin, (-)-vestitol, and formononetin and butylphenols raspberry ketone and rhododendrol were isolated for the first time from the ethylacetate extract of Hedysarum thienum roots by column ...

    I. V. Nechepurenko, N. P. Polovinka, O. I. Sal’nikova… in Chemistry of Natural Compounds (2007)

  12. No Access

    Article

    Synthesis of 5-Aryl-1,4-naphthoquinone and 1-Aryl-9,10-anthraquinone Derivatives by Cycloaddition of 1-(Dimethoxyphenyl)-3-trimethylsiloxy-1,3-butadienes to 1,4-Benzoquinones and 1,4-Naphthoquinones

    The Diels-Alder reaction of new 1-(3,4-dimethoxyphenyl)- or 1-(2,4-dimethoxyphenyl)-2-R-3-trimethylsiloxy-1,3-butadienes with 2,5- and 2,6-dibromo-, and 2-bromo-6-methyl-1,4-benzoquinones regioselectively yiel...

    I. V. Nechepurenko, E. E. Shul'ts, G. A. Tolstikov in Russian Journal of Organic Chemistry (2003)

  13. No Access

    Article

    Inhibition of HIV-1 Reverse Transcriptase by Aryl-Substituted Naphto- and Anthraquinones

    T. V. Ilina, E. A. Semenova, T. R. Pronyaeva… in Doklady Biochemistry and Biophysics (2002)

  14. No Access

    Article

    Cycloaddition of 1-Aryl-3-trimethylsiloxy-1,3-butadienes in the Synthesis of Natural Quinone Analogs

    7-Hydroxy-5-(2-methoxyphenyl)-2-methyl-6-R-1,4-naphthoquinones, 8-hydroxy-1-(2-methoxyphenyl)-3-oxo-1,2,3,4-tetrahydro-9,10-anthraquinone, and 2-ethoxycarbonyl-8-hydroxy-1-(2-methoxyphenyl)-3-trimethylsiloxy-1...

    I. V. Nechepurenko, E. E. Shul'ts, G. A. Tolstikov in Russian Journal of Organic Chemistry (2001)