Leonid V. Spirikhin
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Complex formation of cellular phospholipid with 3,5,7,4′-tetrahydroxyflavonol (kaempferol); 3,5,7,3′,4′-pentahydroxyflavonol ′quercetin); and 3,5,7,3′,4′,5′-hexahydroxyflavonol (myricetin) was… Continue Reading
A reductive transformation of the peroxide products of ozonolysis of derivatives of 3β-O-acetyl-22(17→28)-abeo-lupa-17(28),20(29)-diene and the subsequent intramolecular ketalization led to a… Continue Reading
Under the action of PCl5, the Beckman rearrangement of a 3: 1 mixture of Z- and E-isomeres of 18β-hydro-xydihydroquinopimaric acid resulted in 5′-caprolactam and isomeric caprolactams containing… Continue Reading
The electronic spectra were measured and the unimolecular decay kinetics of the isomeric forms (cis and trans) of 4-methoxyphenylnitroso oxide in acetonitrile, benzene, and hexane was studied using… Continue Reading
Alcohols were prepared by stereospecific hydroxylation of isocembrol and were esterified into N-methylurocanates, proposed biomimetics of taxol.
Flavonoids are a broad class of phenolic compounds of plant origin, with structures based on a pair of benzene rings linked by a three-carbon chain. A large part of flavonoids can be considered as… Continue Reading
The assignment of NMR resonances of lupane triterpenoids was refined by the example of 3O,28O-dinicotinoylbetulin, obtained by acylation of betulin. Hepatoprotective, antiulcer, antiinflammatory,… Continue Reading
Hemisuccinates, hemiphthalates, acetylsalicylates, cinnamates, andp-methoxycinnamates of lupeol, betulin, and 3-O-acetylbetulin were synthesized via interaction with corresponding acid anhydrides or… Continue Reading
Photolysis was inverstigated of quinopimaric acid derivatives under various conditions. The structure of the photolysis products was proved with 1H, 13C, and mass spectra and XRD analysis.