Genrikh A Tolstikov

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Two new triterpenoid saponins 1 and 2 were isolated from the methanol extract of the roots of Acanthophyllum gypsophiloides Regel. These saponins have quillaic acid or gypsogenin moieties as an aglycon, and both bear similar sets of two oligosaccharide chains, which are 3-O-linked to the triterpenoid part trisaccharide(More)
Triterpenoids are used for medicinal purposes in many countries. Some, such as oleanolic and glycyrrhetinic acids, are known to be anti-inflammatory and anticarcinogenic. However, the biological activities of these naturally occurring molecules against their particular targets are weak, so the synthesis of new synthetic analogues with enhanced potency is(More)
Lupane C-28-imidazolides containing 3-oxo-, 3-hydroxyimino-, and 2-cyano-2,3-seco-4(23)-ene fragments in cycle A have been synthesized. 3-3-Hydroxyimino-lup-20(29)-en-28-yl-1H-imidazole-1-carboxylate showed the highest antineoplastic activity in experiments in vitro, significantly inhibiting the growth and inducing the death of cells of lung, colon cancer,(More)
180 In effective complex therapy of cardiovascular diss eases, a major role is played by antithrombotic drugs, the most popular of which are based on acetylsalicylic acid (ASA) medicines [1]. Given the fact that the use of ASA for primary and secondary prevention of carr diovascular diseases is a lifetime measure, the risk of development of adverse side(More)
Triterpenoids with the following amine fragments in C3 and C28 positions were synthesized on the basis of betulinic and oleanolic acids: (3-aminopropoxy)-, 3-acetyl-(3-aminopropyl)amino-, 6-[bis(3-aminopropyl)amino]hexylamino-, and (3-aminopropyl)-4-aminophenylsulfonyl-4-phenylamino. Amide of betulonic acid with 4,4′-diaminodiphenylsulfonic substituent was(More)
3-Deoxy-3a-homo-3a-aza derivatives of betulin and erythrodiol have been synthesized from betulonic and oleanonic acids. 3-Deoxy-3a-homo-3a-aza-28-hydroxy-12(13)-oleanene showed the highest antineoplastic activity of the broad spectrum in vitro; the results of an extensive examination of the derivative in vitro enable one to recommend it for in vivo tests.(More)
7 The results of the study of the 55aminoo66methyluu racil antioxidant activity in vitro and in vivo are pree sented. It has been established that the investigated compound is more active than the reference oxymeth yluracil. It is known that some 55substituted derivatives of 66methyluracil inhibit processes of chainnradical oxii dation in model systems of(More)
Interaction of betulonic acid chloride with 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, 3-amino-2,2,5,5-tetramethylpyrrolidine-1-oxyl, and 3-aminomethyl-2,2,5,5-tetramethylpyrrolidine-1-oxyl yielded the corresponding triterpene amides. The synthesized derivatives of betulonic acid were shown to exhibit a cytotoxic activity on models of the CEM-13, U-937,(More)
The synthesis of (7R,8S)-epoxy-(13R,17R)-trioxolane abietic acid was carried out and its structure was established by X-ray diffraction. The antineoplastic activity and the ability to induce apoptosis that were predicted by a PASS computer system, correlate well with the experimentally found cytotoxic activity towards the MeWo malignant cell line. The(More)
This review considers the synthetic possibilities of monoterpene ketones, such as (R)-(+)- and (S)-(-)-pulegones, (-)-menthone, (R)-(-)- and (S)-(+)-carvones, (2R,5S)-dihydrocarvone, (S)-(+)- and (R)-(-)-camphors, (R)-(-)-nopinone, (R)-(+)- and (S)-(-)-verbenones by the examples of synthesis of optically pure and enantiomerically enriched insect pheromones.