| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 3-oxolupan-28-yl acetate | 111675-26-4 | C32H52O3 | 484.763 |
| —— | betulone | 7020-34-0 | C30H48O2 | 440.71 |
| —— | lupane-3β,28-diol | —— | C30H52O2 | 444.742 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | 3-oxolupan-28-ic acid | 25576-27-6 | C30H48O3 | 456.709 |
| —— | 3-oxolupan-28-yl acetate | 111675-26-4 | C32H52O3 | 484.763 |
| —— | 3-oxolupan-28-oyl chloride | 1007345-49-4 | C30H47ClO2 | 475.155 |
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.