Synthesis and Cytotoxicity of Bidesmosidic Betulin and Betulinic Acid Saponins
摘要:
The naturally occurring cytotoxic saponin 28-O-beta-D-glucopyranosylbetulinic acid 3 beta-O-alpha-L-arabinopyranoside (3) was easily synthesized along with seven bidesmosidic saponins starting from the lupane-type triterpenoids betulin (1) and betulinic acid (2). As highlighted by the preliminary cytotoxicity evaluation against A549, DLD-1, MCF7, and PC-3 human cancer cell lines, the bidesmosidic betulin saponin 22a, bearing alpha-L-rhamnopyranoside moieties at both C-3 and C-28 positions, was determined to be a potent cytotoxic agent (IC50 1.8-1.9 mu M).
[EN] BIDESMOSIDIC BETULIN AND BETULINIC ACID DERIVATIVES AND USES THEREOF AS ANTITUMOR AGENTS<br/>[FR] DÉRIVÉS DE BÉTULINE BIDESMOSIDIQUE ET D'ACIDE BÉTULINIQUE, ET LEURS UTILISATIONS EN TANT QU'AGENTS ANTICANCÉREUX
申请人:UNIV QUEBEC A CHICOUTIMI
公开号:WO2010028487A1
公开(公告)日:2010-03-18
The instant application is directed to bidesmosidic betulin and betulinic acid saponin derivatives of formula (I), and use thereof as antitumor agents. In particular, said compounds are effective in treating lung carcinomas, colorectal adenocarcinomas, breast adenocarcinomas, and prostate adenocarcinomas. Methods of synthesizing said compounds through selective glycosylation of the C-28 and C-3 position, and diagnostic methods for identifying tumours suitable for treatment by said compounds are also disclosed.