Stereoselective Syntheses of<i>α</i>-Glucuronides Using Dehydrative Glycosylation
作者:Shinkiti Koto、Teruhisa Miura、Motoko Hirooka、Aya Tomaru、Mika Iida、Masanori Kanemitsu、Kazuhiro Takenaka、Shinichi Masuzawa、Saeko Miyaji、Naoko Kuroyanagi、Miki Yagishita、Shonosuke Zen、Kazuo Yago、Fumiya Tomonaga
DOI:10.1246/bcsj.69.3247
日期:1996.11
Methyl and benzyl 2,3,4-tri-O-benzyl-d-glucopyranuronates, prepared from d-glucurono-6,3-lactone, afforded selectively the corresponding α-glucopyranosiduronates by the aid of the condensing reagent system composed of p-nitrobenzenesulfonyl chloride, silver trifluoromethanesulfonate, and triethylamine. Using this method, O-α-d-glucopyranuronosyl-(1→3)-O-α-l-arabinofuranosyl-(1→3)-d-xylopyranose, one of the minimal component units in the structure of plantago-mucilage A from the seeds of Plantago asiatica Linné constituting a Chinese medicine : chegianzi [].
在对硝基苯磺酰氯、三氟甲磺酸银和三乙胺组成的缩合试剂体系的帮助下,由 d-葡萄糖醛酸-6,3-内酯制备的 2,3,4-三-O-苄基-d-吡喃葡萄糖醛酸甲酯和苄酯选择性地得到了相应的 α-吡喃葡萄糖苷酸盐。利用这种方法,从构成中药车前子的车前子种子中提取出了车前子粘液 A 结构的最小组成单位之一--O-α-d-吡喃葡萄糖呋喃糖基-(1→3)-O-α-阿拉伯呋喃糖基-(1→3)-d-吡喃木糖[]。