methyl 6,7,8-tri-O-acetyl-2,3,4-tri-O-benzyl-α-D-erythro-D-galacto-octopyranoside | 1401562-84-2

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl 6,7,8-tri-O-acetyl-2,3,4-tri-O-benzyl-α-D-erythro-D-galacto-octopyranoside
• CAS: 1401562-84-2
• 化学式: C₃₆H₄₂O₁₁
• 分子量: 650.723
• InChiKey: DYWWEGTUWKHUII-IIFUUVPLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.54
• 重原子数：
  47.0
• 可旋转键数：
  16.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  125.05
• 氢给体数：
  0.0
• 氢受体数：
  11.0

反应信息

• 作为反应物：
  描述：

  methyl 6,7,8-tri-O-acetyl-2,3,4-tri-O-benzyl-α-D-erythro-D-galacto-octopyranoside 在 5%-palladium/activated carbon 、 氢气 作用下， 以 甲醇 为溶剂， 反应 16.0h， 生成
  参考文献：
  名称：

  Construction of the Octose 8-Phosphate Intermediate in Lincomycin A Biosynthesis: Characterization of the Reactions Catalyzed by LmbR and LmbN

  摘要：

  Lincomycin A is a potent antimicrobial agent noted for its unusual C1 methylmercapto-substituted 8-carbon sugar. Despite its long clinical history for the treatment of Gram-positive infections, the biosynthesis of the C-8-sugar, methylthiolincosamide (MTL), is poorly understood. Here, we report our studies of the two initial enzymatic steps in the MTL biosynthetic pathway leading to the identification of D-erythro-D-gluco-octose 8-phosphate as a key intermediate. Our experiments demonstrate that this intermediate is formed via a transaldol reaction catalyzed by LmbR using D-fructose 6-phosphate or D-sedoheptulose 7-phosphate as the C-3 donor and D-ribose 5-phosphate as the C-5 acceptor. Subsequent 1,2-isomerization catalyzed by LmbN converts the resulting 2-keto C-8-sugar (octulose 8-phosphate) to octose 8-phosphate. These results provide, for the first time, in vitro evidence for the biosynthetic origin of the C-8 backbone of MTL.

  DOI：

  10.1021/ja308221z
• 作为产物：
  描述：

  甲基6-O-[(叔丁基)二甲基硅烷基]-2,3,4-三-O-(苯基甲基)-ALPHA-D-吡喃半乳糖苷 在 吡啶 、 草酰氯 、 甲基磺酰胺 、 hydroquinine 1,4-phthalazinediyl diether 、 四丁基氟化铵 、 二甲基亚砜 作用下， 以 四氢呋喃 、 二氯甲烷 、 水 、 叔丁醇 为溶剂， 反应 33.5h， 生成 methyl 6,7,8-tri-O-acetyl-2,3,4-tri-O-benzyl-α-D-erythro-D-galacto-octopyranoside
  参考文献：
  名称：

  Construction of the Octose 8-Phosphate Intermediate in Lincomycin A Biosynthesis: Characterization of the Reactions Catalyzed by LmbR and LmbN

  摘要：

  Lincomycin A is a potent antimicrobial agent noted for its unusual C1 methylmercapto-substituted 8-carbon sugar. Despite its long clinical history for the treatment of Gram-positive infections, the biosynthesis of the C-8-sugar, methylthiolincosamide (MTL), is poorly understood. Here, we report our studies of the two initial enzymatic steps in the MTL biosynthetic pathway leading to the identification of D-erythro-D-gluco-octose 8-phosphate as a key intermediate. Our experiments demonstrate that this intermediate is formed via a transaldol reaction catalyzed by LmbR using D-fructose 6-phosphate or D-sedoheptulose 7-phosphate as the C-3 donor and D-ribose 5-phosphate as the C-5 acceptor. Subsequent 1,2-isomerization catalyzed by LmbN converts the resulting 2-keto C-8-sugar (octulose 8-phosphate) to octose 8-phosphate. These results provide, for the first time, in vitro evidence for the biosynthetic origin of the C-8 backbone of MTL.

  DOI：

  10.1021/ja308221z