The first synthesis of β-CF 2 -d-manno- and β-CF 2 -d-galactopyranosylesters 1a and 1b is reported. It involves an oxidation-Reformatsky addition sequence on carbohydrate-derived diols and a dehydroxylation of the resulting cyclized compounds. The expected β-CF 2 -d-glycoside and an undesired β-CF 2 -l-glycoside are obtained from this sequence. An application of this methodology to the synthesis of some fluorinated pseudo-glycopeptides, potential selectin inhibitors, is also described.
报告了第一个β-
CF2-d-
甘露糖和β-
CF2-d-半
乳糖苷的合成1a和1b。它涉及
碳水化合物衍生的二醇的氧化-雷马茨基加成序列和所得环化化合物的脱羟基化。预期的β-
CF2-d-糖苷和不需要的β-
CF2-l-糖苷从该序列中获得。还描述了将这种方法应用于一些
氟化假糖肽(潜在的选素
抑制剂)的合成。