The chemical synthesis of the glycopeptidolipid-type pentasaccharide hapten of Mycobacterium avium serovar 19 with a trifluoroacetamido spacer at the reducing end is described. The spacer-armed pentasaccharide 31, when conjugated to an immunogenic protein, can be applied to the serodiagnosis of mycobacterial infections. The questionable structure of the penultimate monosaccharide unit was clarified
描述了在还原端具有三
氟乙酰氨基间隔基的鸟分枝杆菌血清型19的糖肽脂质型五糖半抗原的
化学合成。当间隔臂五糖31与免疫原性蛋白质缀合时,可以用于分枝杆菌感染的血清诊断。倒数第二个
单糖单元的可疑结构被澄清为6-脱氧-3-C-甲基-2,4-二-O-甲基-L-甘露
吡喃糖。存在大的H-1'-H-2'偶联常数可以排除6-脱氧-3-C-甲基-2,4-二-O-甲基-L-塔拉
吡喃糖的存在,这证明了4C1(L)构象为偏爱的构象。