3,4,5-tri-O-acetyl-1,2-O-isopropylidene-β-D-tagatopyranose | 263382-50-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 3,4,5-tri-O-acetyl-1,2-O-isopropylidene-β-D-tagatopyranose
• 英文别名: [(5S,6S,7S,8R)-6,7-diacetyloxy-2,2-dimethyl-1,3,10-trioxaspiro[4.5]decan-8-yl] acetate
• CAS: 263382-50-9
• 化学式: C₁₅H₂₂O₉
• 分子量: 346.334
• InChiKey: AHFBAVGNLZFQSP-OSFYFWSMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.1
• 重原子数：
  24
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  107
• 氢给体数：
  0
• 氢受体数：
  9

反应信息

• 作为反应物：
  描述：

  3,4,5-tri-O-acetyl-1,2-O-isopropylidene-β-D-tagatopyranose 在 sodium methylate 作用下， 以 甲醇 为溶剂， 以200 mg的产率得到1,2-O-isopropylidene-β-D-tagatopyranose
  参考文献：
  名称：

  3,4-Anhydro-1,2-O-isopropylidene-β-d-tagatopyranose and 4,5-anhydro-1,2-O-isopropylidene-β-d-fructopyranose

  摘要：

  3,4-Anhydro-1,2-O-isopropylidene-beta-D-tagatopyranose (8) and 4,5-anhydro-1,2-O-isopropylidene-beta-D-fructopyranose (10) have been prepared by treatment of 3,5-di-O-acetyl-1,2-O- isopropylidene-4-O-toluene-p-sulfonyl-beta-D-fructopyranose with methanolic sodium methoxide. The structures of 8 and 10 were assigned by 1H and 13C NMR spectroscopy and that of 10 by X-ray crystallography; both exist in half-chair conformations. Compounds 8 and 10 interconvert in aqueous sodium hydroxide, giving a ratio of 1:2 at equilibrium. The monoacetates of 8 and 10 (5-O-acetyl-3,4-anhydro-1,2-O-isopropylidene-beta-D-tagatopyranose and 3-O-acetyl-4,5-anhydro-1,2-O-isopropylidene-beta-D-fructopyranose) undergo stereospecific epoxide ring opening in 80% acetic acid to give mainly the axial monoacetates 5-O-acetyl-1,2-O-isopropylidene-beta-D-fructopyranose and 4-O-acetyl-1,2-O-isopropylidene-beta-D-tagatopyranose, respectively.

  DOI：

  10.1016/s0008-6215(99)00272-4
• 作为产物：
  描述：

  3-O-acetyl-1,2-O-isopropylidene-4-O-toluene-p-sulfonyl-β-D-fructopyranose 在 sodium methylate 作用下， 以 吡啶 、 甲醇 、 溶剂黄146 为溶剂， 反应 55.0h， 生成 3,4,5-tri-O-acetyl-1,2-O-isopropylidene-β-D-tagatopyranose
  参考文献：
  名称：

  3,4-Anhydro-1,2-O-isopropylidene-β-d-tagatopyranose and 4,5-anhydro-1,2-O-isopropylidene-β-d-fructopyranose

  摘要：

  3,4-Anhydro-1,2-O-isopropylidene-beta-D-tagatopyranose (8) and 4,5-anhydro-1,2-O-isopropylidene-beta-D-fructopyranose (10) have been prepared by treatment of 3,5-di-O-acetyl-1,2-O- isopropylidene-4-O-toluene-p-sulfonyl-beta-D-fructopyranose with methanolic sodium methoxide. The structures of 8 and 10 were assigned by 1H and 13C NMR spectroscopy and that of 10 by X-ray crystallography; both exist in half-chair conformations. Compounds 8 and 10 interconvert in aqueous sodium hydroxide, giving a ratio of 1:2 at equilibrium. The monoacetates of 8 and 10 (5-O-acetyl-3,4-anhydro-1,2-O-isopropylidene-beta-D-tagatopyranose and 3-O-acetyl-4,5-anhydro-1,2-O-isopropylidene-beta-D-fructopyranose) undergo stereospecific epoxide ring opening in 80% acetic acid to give mainly the axial monoacetates 5-O-acetyl-1,2-O-isopropylidene-beta-D-fructopyranose and 4-O-acetyl-1,2-O-isopropylidene-beta-D-tagatopyranose, respectively.

  DOI：

  10.1016/s0008-6215(99)00272-4

文献信息

• ENZYMATIC O-GALACTOSYLATION OF SELECTED FREE AS WELL AS PARTIALLY PROTECTED KETOHEXOSES
  作者：Brigitte Eder、Inge Lundt、Arnold Stütz、Tanja Wrodnigg

  DOI：10.1081/car-100108279

  日期：——

  A range of partially protected ketoses was O-galactosylated with P-galactosidase from Aspergillus oryzae employing (4-nitro)phenyl beta -D-galactopyranoside as the donor. This enzyme also accepted free D-tagatose as a substrate.