Synthetic transformations of higher terpenoids: XXIV. Synthesis of cyanoethyl derivatives of lupane triterpenoids and their transformation into 1,2,4-oxadiazoles
摘要:
Cyanoethylation of lupane triterpenoids was performed. Amide oximes of 3 beta-O-(2-cyanoethyl)-betulinic acid methyl ester and 3 beta-O-acetyl-28-O-(2-cyanoethyl)betulin and the corresponding O-[2-(1,2,4-oxadiazol-3-yl)ethyl] lupane derivatives were obtained.