Crude Drugs from Aquatic Plants. I. On the Constituents of Alismatis Rhizoma. (1). Absolute Stereostructures of Alisols E 23-Acetate, F, and G, Three New Protostane-Type Triterpenes from Chinese Alismatis Rhizoma.
摘要:
从中国泽泻根茎(中国四川省采集的水生植物东方泽泻的干燥根茎(日文为 Sentaku))的极性较低的部分中,分离出了三种新的原烷型三萜类化合物,分别命名为泽泻醇 E 23-乙酸酯、F 和 G,以及四种愈创木型倍半萜类化合物和几种已知的三萜类化合物,包括 13,17-表紫苏醇 A。根据化学和物理化学证据,包括 E 23-乙酸烯醇、F 和 G 与已知三萜类烯醇 A 和 A 24-乙酸酯的化学相关性,以及应用改进的莫舍尔法,确定了 E 23-乙酸烯醇、F 和 G 的绝对立体结构。
A series of alisol A derivatives were synthesized and evaluated for their anti-hepatitis B virus (HBV) activities and cytotoxicities in vitro. The preliminary investigation demonstrates that simple modifications of the parent structure of alisol A can produce a number of potentially important derivatives against HBV. The most active anti-HBV compound 6a showed high activities against the secretion
Crude Drugs from Aquatic Plants. I. On the Constituents of Alismatis Rhizoma. (1). Absolute Stereostructures of Alisols E 23-Acetate, F, and G, Three New Protostane-Type Triterpenes from Chinese Alismatis Rhizoma.
From the less polar fraction of Chinese Alismatis Rhizoma [the dried rhizome of the aquatic plant Alisma orientale JUZEP. collected in Szechwan Province, China (Sentaku in Japanese)], three new protostane-type triterpenes named alisols E 23-acetate, F, and G were isolated together with four guaiane-type sesquiterpenes and several known triterpenes including 13, 17-epoxyalisol A. The absolute stereostructures of alisols E 23-acetate, F, and G have been determined on the basis of chemical and physicochemical evidence, which included the chemical correlations of alisols E 23-acetate, F, and G with the known triterpenes alisols A and A 24-acetate, and the application of the modified Mosher's method.
从中国泽泻根茎(中国四川省采集的水生植物东方泽泻的干燥根茎(日文为 Sentaku))的极性较低的部分中,分离出了三种新的原烷型三萜类化合物,分别命名为泽泻醇 E 23-乙酸酯、F 和 G,以及四种愈创木型倍半萜类化合物和几种已知的三萜类化合物,包括 13,17-表紫苏醇 A。根据化学和物理化学证据,包括 E 23-乙酸烯醇、F 和 G 与已知三萜类烯醇 A 和 A 24-乙酸酯的化学相关性,以及应用改进的莫舍尔法,确定了 E 23-乙酸烯醇、F 和 G 的绝对立体结构。
Murata,T. et al., Chemical and pharmaceutical bulletin, 1970, vol. 18, # 7, p. 1369 - 1384