摘要
The focus of this work is the synthesis of an ursolic acid saponin with an N-acetylglucosamine-containing trisaccharide residue. Therefore, ursolic acid 3-yl α-L-arabinopyranosyl-（1→2）-α-L-arabinopyranosyl-（1→6）-2- acetamido-2-deoxy-β-D-glucopyranoside （1） was concisely synthesized in convergent synthesis with 48.0% overall yield. The structure of saponin 1 was confirmed by ^1H NMR, ^13C NMR and mass spectra.
The focus of this work is the synthesis of an ursolic acid saponin with an N-acetylglucosamine-containing trisaccharide residue. Therefore, ursolic acid 3-yl α-L-arabinopyranosyl-（1→2）-α-L-arabinopyranosyl-（1→6）-2- acetamido-2-deoxy-β-D-glucopyranoside （1） was concisely synthesized in convergent synthesis with 48.0% overall yield. The structure of saponin 1 was confirmed by ^1H NMR, ^13C NMR and mass spectra.
基金
Project supported by the National Natural Science Foundation of China （No. 30400564）.
