Galactose and mannose building blocks 9 and 12 were designed for the solid phase synthesis of oligosaccharides (SPOS). Both compounds were employed after condensation with benzoic acid function containing resin 10 in SPOS of human milk trisaccharide 1 and oligomannosides 2-4 (α-(1Æ2)-linked hexamer). Thus, in this approach a special linker development was not required and with the temporary protective groups phenoxyacetyl (PA) and 9-fluorenylmethoxycarbonyl (Fmoc) as part of compounds 7-12 the strategy offers the additional advantage of having the anomeric centre at the reducing end available for further manipulations.
为低聚糖固相合成(
SPOS)设计了半
乳糖和
甘露糖结构单元 9 和 12。这两种化合物在与含
苯甲酸功能的
树脂 10 缩合后,被用于人乳三糖 1 和低聚
甘露糖 2-4 (δ-(1Æ2)连接六聚体)的
SPOS。因此,在这种方法中,不需要开发特殊的连接体,而且由于化合物 7-12 中含有临时保护基团苯氧乙酰(PA)和 9-
芴甲氧羰基(Fmoc),该策略还具有另一个优势,即还原端的异构体中心可用于进一步操作。