compounds were converted into four, separable 1,2,4-tri-O-acetates, the structures and conformations of which were established by spectroscopy. The corresponding per-O-acetyl-5-deoxy-5-C-[(R)- and (S)-phenylphosphinyl] analogues were also prepared and their previously presented structures were revised. Complete 1H NMR (500-MHz) parameters of these two types of compounds are given for a comparative, structural
5-脱氧-5-
碘-1,2-O-异亚丙基-3-O-甲基-α-D-木
呋喃糖与苯基
硫代
膦酸乙酯在
DMF 中 NaH 存在下处理得到 1:1 的 5-脱氧混合物-5-C-[(R)-和(S)-(乙氧基)苯基
硫代膦酰基]衍
生物。用二氢双(2-甲氧基乙氧基)
铝酸钠还原这些 D-
呋喃木糖,然后进行酸
水解,得到标题化合物,它是第一个在
半缩醛环中具有
硫代膦酰基的
糖类似物。这些化合物被转化为四种可分离的 1,2,4-三-O-
乙酸酯,其结构和构象由光谱学确定。还制备了相应的 per-O-acetyl-5-deoxy-5-C-[(R)-和 (S)-phenylphoshinyl] 类似物,并对它们先前提出的结构进行了修改。