Synthesis of tetrasaccharides related to the antigenic determinants from the glycopeptidolipid antigens of serovars 9 and 25 in the Mycobacterium avium-M. intracellulare-M. scrofulaceum serocomplex
作者:Ken'ichi Takeo、Gerald O. Aspinall、Patrick J. Brennan、Delphi Chatterjee
DOI:10.1016/0008-6215(86)80011-8
日期:1986.8
structures, respectively, have been proposed as the carbohydrate chains in the polar glycopeptidolipid antigens of serovars 9 and 25 in the Mycobacterium avium-M. intracellulare-M. scrofulaceum serocomplex. Glycosylation of allyl 2,3-di-O-methyl-alpha-L-fucopyranoside with 4-O-benzoyl-2,3-di-O-methyl-alpha-L-fucopyranosyl chloride gave the alpha-linked disaccharide derivative, which was O-deallylated and
四糖O-(2,3-二-O-甲基-α-L-富勒基糖基)-(1 ---- 4)-O-(2,3-二-O-甲基-α-L -fucopyranosyl)-(1 ---- 3)-O-alpha-L-鼠李吡喃糖基-(1 ---- 2)-6-脱氧基-L-塔洛糖(36)和O-(2-O-甲基- α-L-呋喃核糖基)-(1 ---- 4)-O-(2-O-甲基-α-L-呋喃核糖基)-(1 ---- 3)-O-α-L-鼠李糖基-描述了1 ----- 2)-6-脱氧-L-塔洛糖(41)。已经提出前者和后者的结构分别作为鸟分枝杆菌-M中血清型9和25的极性糖肽脂质抗原中的碳水化合物链。细胞内 血清复合体。用4-O-苯甲酰基-2,3-二-O-甲基-α-L-呋喃二糖基氯对烯丙基2,3-二-O-甲基-α-L-呋喃二糖苷进行糖基化,得到α-连接的二糖衍生物,将其O-去甲酰化并转化为相应的二糖α-氯化物。将其与苄基3,4-二-O-苄基-6-脱氧-2-O-(2