All the possible types of the protopanaxatriol and protopanaxadiol glycosides, the major active yet extremely heterogeneous principles of ginsengs, could be accessed by the present sequence of transformations, including global removal of the sugar residues from the crude ginseng extracts and stepwise elaboration of the glycans onto the aglycone. In particular, intramolecular hydrogen-bonding and neutral conditions have enabled glycosylation of the highly sterically hindered and acid labile dammarane C20-OH.
人参的主要活性成分
原人参三醇和
原人参二醇苷的所有可能类型都可以通过目前的一系列转化过程获得,包括全面去除人参粗
提取物中的糖残基,以及逐步将聚糖加工到苷元上。特别是,分子内氢键和中性条件使得具有高度立体阻碍和酸性的
达玛烷 C20-OH 得以糖基化。