Isolation of a new disaccharide nucleoside from Helleborus caucasicus: structure elucidation and total synthesis of hellecaucaside A and its β-anomer
作者:Balla Sylla、Charles Gauthier、Jean Legault、Pierre-Yves Fleury、Serge Lavoie、Vakhtang Mshvildadze、Tamar Muzashvili、Eter Kemertelidze、André Pichette
DOI:10.1016/j.carres.2014.06.027
日期:2014.10
position, was isolated from the underground part of Helleborus caucasicus. The structure of the compound was elucidated by means of chemical degradation and spectroscopic analyses, such as 1D/2D NMR, chiral-GC, and HRMS. The total synthesis of hellecaucaside A and its β-anomer was accomplished, unequivocally confirming the structure of the natural product.
Hellecaucaside A是一种新的二糖核苷,具有2'-O-α-D-呋喃呋喃基葡糖苷骨架和5'位置的4-羟基苯甲酰基,是从Helleborus caucasicus的地下部分中分离出来的。通过化学降解和光谱分析(例如1D / 2D NMR,手性GC和HRMS)阐明了化合物的结构。hellecaucaside A和它的β-端基异构体的总合成完成了,明确地证实了天然产物的结构。