2-O-[4-O-(2-Acetamido-2-deoxy-beta-D-mannopyranosyl)-alpha-D- glucopyranosyl]-alpha,beta-L-rhamnopyranose, a structural component of the capsular polysaccharide of Streptococcus pneumoniae type 19F, has been synthesized by sequential glycosylation reactions using the glycosyl acceptor 2,2,2-trichloroethyl 3,4-di-O-benzyl-alpha-L-rhamnopyranoside (prepared from the known 2-O-acetyl-3,4-di-O-benzyl-
2-O- [4-O-(2-乙酰胺基-2-脱氧-β-D-甘露
吡喃糖基)-α-D-
吡喃
吡喃糖基]-α,β-
L-鼠李糖吡喃糖,肺炎链球菌荚膜
多糖的结构成分通过使用糖基受体2,2,2-三
氯乙基3,4-二-O-苄基-α-
L-鼠李糖吡喃糖苷(由已知的2-O-乙酰基-3,4制备)的顺序糖基化反应合成了19F型-二-O-苄基-α-
L-鼠李糖基
氯)和糖基供体4-O-乙酰基-2,3,6-三-O-苄基-α-
D-吡喃葡萄糖基
氯和4,6-二- O-乙酰基-2-
叠氮基-3-O-苄基-2-脱氧-α-D-甘露
吡喃糖基
溴(由已知的甲基2-
叠氮基-4,6-O-亚苄基-2-脱氧-α七步制备-D-altropyranoside)。相应的8-(甲氧羰基)辛基糖苷也已经合成,