Regiospecific Synthesis of Three Quercetin <i>O</i>-β-Glucosides of <i>N</i>-Acetylglucosamine
作者:Zhiling Cao、Jing Chen、Dandan Zhu、Zongnan Yang、Wenqi Teng、Gaofeng Liu、Bing Liu、Chuanzhou Tao
DOI:10.3184/174751918x15232706115112
日期:2018.4
The regiospecific synthesis of three quercetin O-β-glucosides of N-acetylglucosamine has been achieved in good yield. Selective di-and tri-O-benzylation of quercetin followed by O-glycosylation with 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-α-D-glucopyranosyl chloride under phase-transfer catalysis conditions yielded, after deacetylation and debenzylation, 3-, 3′- and 4′-glycosylated quercetin.
N-乙酰氨基葡萄糖的三种槲皮素O-β-葡萄糖苷的区域特异性合成已以良好的收率实现。槲皮素的选择性二和三 O-苄基化,然后在相转移催化条件下与 2-乙酰氨基-3,4,6-三-O-乙酰基-2-脱氧-α-D-吡喃葡萄糖基氯进行 O-糖基化,得到,经过去乙酰化和去苄基化后,3-、3'-和 4'-糖基化槲皮素。