Saponin and sapogenol. XXII. Structure of spergulatriol, a new bisnorhopane-type genuine sapogenol of isoanhydrospergulatriol, from the root of Mollugo spergula L.
摘要:
By using the soil bacterial hydrolysis method and by enzymatic hydrolysis, spergulagenin A (1), which was previously obtained along with two oleanene-type sapogenols (oleanolic acid (2) and methyl spergulagenate (3)) by acid hydrolysis of the total saponin mixture extracted from the root of Mollugo spergula L. (Molluginaceae), has been shown to be a genuine sapogenol. In addition, enzymatic hydrolysis using crude naringinase of the same saponin mixture has led to the isolation of a new bisnorhopanetype sapogenol named spergulatriol (4). Based on the chemical and spectral evidence, the structure of spergulatriol has been elucidated to be 4 and it has been demonstrated that spergulatriol (4) is the genuine sapogenol of isoanhydrospergulatriol (5), which is a dienic bisnorhopane-type sapogenol and is isolated as a minor sapogenol from the acid hydrolysate of total saponin mixture.
作者:Niranjan P Sahu、Kazuo Koike、Sukdeb Banerjee、Basudeb Achari、Tamotsu Nikaido
DOI:10.1016/s0031-9422(01)00346-6
日期:2001.12
4-sulphate)-spergulagenin A] (1) and spergulin B [3-O-[alpha-rhamnopyranosyl (1-->2)-beta-D-xylopyranosyl]-spergulatriol] (4) were isolated from the aerial part of Mollugospergula along with spergulacin (2) and spergulacin A (3). Their structures and relative stereochemistry were determined by a combination of 2D-NMR (COSY, TOCSY, HETCOR, NOESY and HMBC) and HR-FAB-MS analysis coupled with strategic chemical
属于修饰的藿烷组的两种新型三萜皂苷,spergulin A [3-O-(beta-D-xylopyranOSyl 4-sulphate)-spergulagenin A] (1) 和 spergulin B [3-O-[α-rhamnopyranOSyl (1- ->2)-β-D-吡喃木糖基]-spergulatriol] (4) 与 spergulacin (2) 和 spergulacin A (3) 从 Mollugo spergula 的地上部分分离。它们的结构和相对立体化学通过 2D-NMR(COSY、TOCSY、HETCOR、NOESY 和 HMBC)和 HR-FAB-MS 分析以及战略化学和酶促转化的组合确定。
Yadava; Chakravarti, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2009, vol. 48, # 1, p. 83 - 87