Semi-synthesis and Structure-Activity Relationship of Neuritogenic Oleanene Derivatives
作者:Linglin Bian、Shining Cao、Lihong Cheng、Atsuo Nakazaki、Toshio Nishikawa、Jianhua Qi
DOI:10.1002/cmdc.201800352
日期:2018.9.19
the structure and to assess biological activity, we semi‐synthesized 1 a from commercially available oleanolic acid. A series of novel 1 a derivatives was then designed and synthesized for a structure–activity relationship (SAR) study. All synthetic derivatives were characterized by analysis of spectral data, and their neuritogenic activities were evaluated in assays with PC12 cells. The SAR results
从(3 S,4 R)-23,28-Dihydroxyolean-12-en-3-yl(2 E)-3-(3,4-dihydroxyphenyl)丙烯酸酯(1 a)中分离出具有显着神经形成活性的传统中草药(Desmodium sambuense)植物。为了确定结构并评估生物活性,我们从市售齐墩果酸中半合成了1 a。小说系列1a然后设计并合成衍生物,以进行结构-活性关系(SAR)研究。所有合成衍生物均通过光谱数据分析进行表征,并在PC12细胞测定中评估了它们的神经生成活性。SAR结果表明,苯环和三萜烯部分上羟基的数量和位置,以及将苯环与三萜烯连接的(饱和或不饱和)烷基链的长度严重影响了神经形成活性。在所有测试的化合物中,发现了1 e [(3 S,4 R)-23,28-dihydroxyolean-12-en-3-yl(2 E)-3-(3,4,5-三羟基苯基)丙烯酸酯]最有效,可在1μm处引起明显的神经突生长。