Study on the Bile Salt, Sodium Scymnol Sulfate, from Lamna ditropis. III. The Structures of a New Sodium Scymnol Sulfate and New Anhydroscymnols.
作者:Hitoshi ISHIDA、Shunya KINOSHITA、Ryukan NATSUYAMA、Haruo NUKAYA、Kuniro TSUJI、Michio NAGASAWA、Takuo KOSUGE
DOI:10.1248/cpb.40.864
日期:——
Two sodium scymnol sulfates, 1 and 2, were isolated by two steps of chromatography from the bile of Lamna ditropis. Compound 2 was identified as (24R, 25S)-(+)-3α, 7α, 12α, 24, 26-pentahydroxy-5β-cholestan-27-yl sodium sulfate and the structure of 1 was determined to be (24R, 25R)-(+)-3α, 7α, 12α, 24, 26-pentahydroxy-5β-cholestan-27-yl sodium sulfate, based on the spectral data and chemical transformations. Based on the physical data, the structures of two new anhydroscymnols, 3 and 4, prepared from 1 by alkaline degradation with aqueous potassium hydroxide, were established as (24R, 25R)-(+)-24, 26-epoxy-5β-cholestane-3α, 7α, 12α, 27-tetrol and (24R)-(+)-26, 27-epoxy-5β-cholestane-3α, 7α, 12α, 24-tetrol, respectively. The other shark bile constituents were also analyzed, and the hydrolysis of the sulfate ester function of 1 and 2 was examined.
通过两步色谱法从 Lamna ditropis 的胆汁中分离出两种 scymnol 硫酸钠 1 和 2。化合物2经鉴定为(24R,25S)-(+)-3α,7α,12α,24,26-五羟基-5β-胆甾坦-27-基硫酸钠,1的结构确定为(24R,25R) -(+)-3α, 7α, 12α, 24, 26-五羟基-5β-胆甾烷-27-基硫酸钠,基于光谱数据和化学转化。根据物理数据,由 1 通过氢氧化钾水溶液碱降解制备两种新的脱水莼醇 3 和 4,其结构被确定为 (24R, 25R)-(+)-24, 26-epoxy-5β-cholestane分别为-3α、7α、12α、27-四醇和(24R)-(+)-26、27-环氧-5β-胆甾烷-3α、7α、12α、24-四醇。还分析了其他鲨鱼胆汁成分,并检查了1和2的硫酸酯功能的水解。