Cytotoxic effect of some pentacyclic triterpenes and hemisynthetic derivatives of stigmasterol
作者:Louis P. Sandjo、Vincent Rincheval、Bonaventure T. Ngadjui、Gilbert Kirsch
DOI:10.1007/s10600-011-0045-8
日期:2011.11
Two different oxidation reactions (PCC and KMnO4) of stigmasterol gave three products, stigmasta-4,22-dien-3-one (1a), stigmasta-4,22-diene-3,6-dione (1b), and 3-O-acetyl-5β,6β-epoxystigmast-22-ene-3-ol (1c). The cytotoxic activities of hemisynthetic compounds, stigmasterol, and four pentacyclic triterpens 2–5 previously isolated from cultivated and wild Triumfetta cordifolia and identified were investigated against human fibrosarcoma cell line (HT1080). Most of the drugs showed moderate cytotoxic activity. It was also notice that the triterpene skeleton had a range of number of OH functions in which activity was observed. Spectroscopic analyses (1H and 13 C NMR) and mass were used to elucidate the structure of hemisynthetic compounds.
麦角甾醇的两种不同氧化反应(PCC 和 KMnO4)产生了三种产物:麦角甾-4,22-二烯-3-酮(1a)、麦角甾-4,22-二烯-3,6-二酮(1b)和 3-O-乙酰基-5β,6β-环氧麦角甾-22-烯-3-醇(1c)。研究了半合成化合物、豆甾醇和之前从栽培和野生脐叶三叶草(Triumfetta cordifolia)中分离并鉴定出的四种五环三萜 2-5 对人类纤维肉瘤细胞系(HT1080)的细胞毒活性。大多数药物显示出中等程度的细胞毒性活性。研究还注意到,三萜类骨架具有一定数量的羟基官能团,在这些官能团中可以观察到活性。光谱分析(1H 和 13 C NMR)和质量分析用于阐明半合成化合物的结构。