Bp. Pradhan et al., OXIDATION OF TRITERPENOIDS .17. OXIDATION OF ISOPROPENYL DOUBLE-BOND OF LUPANE SKELETON WITH M-CHLOROPERBENZOIC ACID IN A MOLAR PROPORTION, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 34(6), 1995, pp. 540-542
Methyl 3-O-acetylbetulinate (1) on refluxing with m-chloroperbenzoic a
cid in a molar proportion in chloroform affords methyl 3 eta-acetoxy-3
0-hydroxylup-20(29)-en-28-carboxylate (3) and lupenyl acetate (2) furn
ishes 3 beta-acetoxy-3O-hydroxy-lup-20(29)-ene (4). The structures of
the compounds have been established on the basis of elemental analysis
and spectral data.