Saussureamines A, B, C, D, and E, new anti-ulcer principles from Chinese Saussureae Radix.
作者:Masayuki YOSHIKAWA、Shoko HATAKEYAMA、Yasuhiro INOUE、Johji YAMAHARA
DOI:10.1248/cpb.41.214
日期:——
Five new amino acid-sesquiterpene adducts, saussureamines A, B, C, D, and E, were isolated from Chinese Saussureae Radix, the dried root of Saussurea lappa CLARKE, together with a new lignan glycoside, (-)-massoniresinol 4"-O-β-D-glucopyranoside. Their structures were determined on the basis of chemical and physicochemical evidence. Among of these compounds. saussureamines A, B, C showed anti-ulcer effect on HCl / ethanol-induced lesions in rats, and saussureamine A also exhibited a inhibitory activiity on stress-induced ulcer formation in mice. During the course of these studies, facile conversion from sesquiterpene having an α-methylene γ-lactone function to amino acid-sesquiterpene adduct has been accomplished by means of Michael type addition reaction.
从中国莎草(Saussurea lappa CLARKE的干燥根)中分离出了五种新的氨基酸-倍半萜加合物--莎草胺A、B、C、D和E,以及一种新的木质素苷--(-)-massoniresinol 4"-O-β-D-吡喃葡萄糖苷。根据化学和物理化学证据确定了它们的结构。在这些化合物中,红豆杉胺 A、B、C 对盐酸/乙醇诱导的大鼠溃疡有抗溃疡作用,红豆杉胺 A 还对压力诱导的小鼠溃疡有抑制作用。在这些研究过程中,通过迈克尔式加成反应,将具有α-亚甲基γ-内酯功能的倍半萜轻松转化为氨基酸-倍半萜加合物。