A novel method for the synthesis of unsaturated sulfur-linked (1→4)-disaccharides is described. The starting 1,6-anhydro-3,4-dideoxy-2-O-tosyl-β-D-erythro-hex-3-enopyranose (3) was reacted with potassium salt of acetylated 1-thiohexopyranoses of D-gluco-, D-galacto-, and L-galacto-configuration to give acetylated β-glycopyranosyl-(1→4)-1,6-anhydro-2,3-dideoxy-4-thio-β-D-erythro-hex-2-enopyranoses 8-10. Their acid methanolysis under mild conditions afforded the corresponding methyl glycosides 11-13. The structure of new compounds was confirmed by 1H NMR and mass spectra data.
描述了一种合成不饱和
硫连接的(1→4)-二糖的新方法。起始物1,6-脱
水-3,4-二脱氧-2-O-对
甲苯磺酰-β-D-
赤霉醇-3-烯
吡喃糖(3)与
D-葡萄糖、
D-半乳糖和L-半
乳糖构型的乙酰化1-
硫代己糖
吡喃糖的
钾盐反应,得到了乙酰化的β-
葡萄糖吡喃糖-(1→4)-1,6-脱
水-2,3-二脱氧-4-
硫-β-D-
赤霉醇-2-烯
吡喃糖(8-10)。它们在温和条件下进行酸
甲醇解,得到相应的甲基糖苷(11-13)。新化合物的结构经过1H NMR和质谱数据确认。