Synthesis of various sulfoforms of the trisaccharide β-<scp>d</scp>-GlcpA-(1→3)-β-<scp>d</scp>-Galp-(1→3)-β-<scp>d</scp>-Galp-(1→OMP) as probes for the study of the biosynthesis and sorting of proteoglycans
作者:Bertrand Thollas、Jean-Claude Jacquinet
DOI:10.1039/b314244b
日期:——
A straightforward preparation of various sulfoforms of the trisaccharide 4-methoxyphenyl O-(sodium beta-d-glucopyranosyluronate)-(1-->3)-( beta-d-galactopyranosyl)-(1-->3)-beta-d-galactopyranoside (1), namely its 6a- and 4a-monosulfate, 6b- and 4b-monosulfate and 6a,6b-disulfate derivatives, is reported for the first time. These compounds, which are partial structures of the linkage region of proteoglycans
三糖4-甲氧基苯基O-(β-d-吡喃葡萄糖基尿酸钠)-(1-> 3)-(beta-d-吡喃半乳糖基)-(1-> 3)-beta-d的各种磺化物的直接制备首次报道了β-吡喃半乳糖苷(1),即其6a-和4a-单硫酸盐,6b-和4b-单硫酸盐和6a,6b-二硫酸盐衍生物。这些化合物是蛋白聚糖连接区域的部分结构,将用作研究这些大分子的生物合成和分选的探针。关键的三糖衍生物被用作常见的中间体,其中两个相似的d-Gal单元分别以4,6-亚苄基和4,6-二叔丁基亚甲缩醛在C-4,6处进行了区分。两个缩醛基团均显示出优异的正交性,并可以高收率制备所有目标化合物。