A variety of new and earlier synthesized lupane, oleanane, ursane and dammarane
triterpenoids have been investigated for their inhibitory activity against α-glucosidase. 2, 3 …

Triterpenoids with aminopropoxy groups in C-28 or C-3 and C-28 positions were
synthesized from betulin, erythrodiol, uvaol, oleantriol and betulinic acid N …

A series of new steroidal peroxides–3′-trifluoromethylated 1, 2, 4-trioxolanes and 1, 2, 4, 5-
tetraoxanes based on deoxycholic acid were prepared via the reactions of the Griesbaum …

A one-pot synthesis of a hybrid triterpenoid-steroid molecule, hollongdione (22, 23, 24, 25,
26, 27-hexanordammar-3, 20-dion), was achieved in a yield of 89%, based on the selective …

Abstract 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) …

It was found that ozonolysis of 3-oximino-28-oxoallobetulin under normal conditions (CHCl
3, 0° C) led to the preferred formation of azepanone (lactam) ring-A (61%) and partial …

Features of process of oxidative lactonization of 3-oxooleanolic and 3-oxoursolic acids
under treatment with ozone were established. The similarity of the processes consists in …

The first oxidative transformations of 3β-acetoxy-21β-acetyl-20β, 28-epoxy-18α, 19β H-
ursane at the 21β-acetyl reaction center were performed. Ursane-type 1, 2, 4, 5-tetraoxanes …

Griesbaum ozonolysis of mixtures of methyl 3-(methoxyimino)-5β-cholan-24-oate with
ketones (cyclohexanone, methyl trifluoromethyl ketone, and phenyl trifluoromethyl ketone) …

Осуществлен синтез новых производных платановой кислоты полученных
модификацией С2, С3 и С30-положений тритерпенового остова. Изучение …