The absolute stereostructures of betavulgarosides III and IV, which were isolated from the roots of Beta vulgaris L. (sugar beet) and exhibited inhibitory activity on glucose absorption, were determined by the chemical correlation of betavulgaroside IV with a known saponin momordin I, which included the conversion from the α-L-arabinopyranosyl moiety of momordin I to the acidic acetal-type substituent of betavulgarosides III and IV via the α-L-ribopyranosyl derivative. Furthermore, four acidic acetal-type substituent analogues were synthesized from L- and D-arabinose.
从甜菜(Beta vulgaris L.)的根部分离得到了具有抑制
葡萄糖吸收活性的β
甜菜苷III和IV,并通过β
甜菜苷IV与已知的
皂苷momordin I的
化学相关性确定了它们的绝对立体结构。这一过程包括将momordin I中的α-L-阿拉伯
呋喃糖基部分转化为β
甜菜苷III和IV中的酸性
缩醛型取代基,即α-L-核
呋喃糖衍
生物。此外,还从L-和
D-阿拉伯糖合成了四种酸性
缩醛型取代基类似物。