| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 28-hydroxylupan-3-one | 97451-93-9 | C30H50O2 | 442.726 |
| —— | 28-acetoxybetulin | 27686-35-7 | C32H52O3 | 484.763 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 28-acetoxy-2α-hydroxylupan-3-one | 159258-93-2 | C32H52O4 | 500.762 |
| —— | 28-hydroxylupan-3-one | 97451-93-9 | C30H50O2 | 442.726 |
| —— | 2-((3R,4R,5R,8R,9R,10R,13S,14R,15S)-4-Carboxymethyl-13-hydroxymethyl-15-isopropyl-4,9,10-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl)-2-methyl-propionic acid methyl ester | 159258-99-8 | C31H52O5 | 504.751 |
| —— | 2-((3R,4R,5R,8R,9R,10R,13S,14R,15S)-13-Hydroxymethyl-15-isopropyl-4-methoxycarbonylmethyl-4,9,10-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-yl)-2-methyl-propionic acid | 159258-98-7 | C31H52O5 | 504.751 |
| —— | 2-[(3R,4R,5R,8R,9R,10R,13S,14R,15S)-4-(carboxymethyl)-13-(hydroxymethyl)-4,9,10-trimethyl-15-propan-2-yl-2,3,5,6,7,8,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl]-2-methylpropanoic acid | 159258-96-5 | C30H50O5 | 490.724 |
A series of 3- and 28-glucosides and glucosyl esters of betulinic acid (
New lupane-type triterpenoids with 5(6) double bond were prepared using the method of partial demethylation on carbon C-4. Hydroboration of the double bond led to 6α-hydroxy derivative. By the oxidation and following reduction of 6α-hydroxy derivative the 6-oxo and 6β-hydroxy derivatives were prepared. A new method for selective oxidation of secondary hydroxy group in the presence of primary hydroxy group was performed. The conformation of ring A of new lupane-type 3-oxo derivatives with a substituent on ring B was elucidated on the bases of 1H and 13C NMR spectra and molecular modelling.