1,2,4,6-tetra-O-acetyl-3-O-methyl-β-D-galactopyranoside | 4163-58-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 1,2,4,6-tetra-O-acetyl-3-O-methyl-β-D-galactopyranoside
• 英文别名: D-Glucopyranose, 3-O-methyl-, tetraacetate；1,2,4,6-Tetra-O-acetyl-3-O-methyl-α-D-mannopyranose
• CAS: 4163-58-0；4163-64-8；53957-07-6；65759-65-1；65759-66-2；95341-74-5；132561-88-7；65877-62-5
• 化学式: C₁₅H₂₂O₁₀
• 分子量: 362.334
• InChiKey: DCJXMAVPDMWIOR-MRLBHPIUSA-N

物化性质

• 沸点：
  424.3±45.0 °C(Predicted)
• 密度：
  1.27±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.28
• 重原子数：
  25.0
• 可旋转键数：
  6.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  123.66
• 氢给体数：
  0.0
• 氢受体数：
  10.0

反应信息

• 作为反应物：
  描述：

  1,2,4,6-tetra-O-acetyl-3-O-methyl-β-D-galactopyranoside 在 三氟化硼乙醚 、 水 、 三乙胺 作用下， 以 甲醇 、 甲苯 为溶剂， 反应 18.0h， 生成 p-nitrophenyl 3-O-methyl-α-D-mannopyranoside
  参考文献：
  名称：

  Synthesis of Monomethyl Derivatives ofP-Nitrophenyl α-D-Gluco, Galacto, and Mannopyranosides and their Hydrolytic Properties Against α-Glycosidases

  摘要：

  All possible monomethyl derivatives of p-nitrophenyl alpha-D-gluco, galacto, and mannopyranosides were synthesized. Hydrolytic activities of alpha-glucosidase (rice), alpha-galactosidases (green coffee bean, Mortierella vinacea, and Aspergillus niger), and alpha-mannosidases (almond and jack bean) against them were elucidated. The 6-O-methyl galactopyranoside and mannopyranoside were hydrolyzed by the M. vinacea alpha-galactosidase and the almond and jack bean alpha-mannosidases, respectively, while these enzymes did not act on the 2-, 3-, and 4-O-methyl derivatives. On the other hand, lice alpha-glucosidase and green coffee bean and A. niger alpha-galactosidases had no hydrolyzing activities at all against the respective four monomethylated substrates.

  DOI：

  10.1080/07328300008544084
• 作为产物：
  描述：

  甲基 4,6-O-亚苄基-3-O-甲基-alpha-D-吡喃甘露糖苷 在 palladium on activated charcoal 盐酸 、 硫酸 、 氢气 、 溶剂黄146 作用下， 以 乙醇 为溶剂， 反应 18.0h， 生成 1,2,4,6-tetra-O-acetyl-3-O-methyl-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Monomethyl Derivatives ofP-Nitrophenyl α-D-Gluco, Galacto, and Mannopyranosides and their Hydrolytic Properties Against α-Glycosidases

  摘要：

  All possible monomethyl derivatives of p-nitrophenyl alpha-D-gluco, galacto, and mannopyranosides were synthesized. Hydrolytic activities of alpha-glucosidase (rice), alpha-galactosidases (green coffee bean, Mortierella vinacea, and Aspergillus niger), and alpha-mannosidases (almond and jack bean) against them were elucidated. The 6-O-methyl galactopyranoside and mannopyranoside were hydrolyzed by the M. vinacea alpha-galactosidase and the almond and jack bean alpha-mannosidases, respectively, while these enzymes did not act on the 2-, 3-, and 4-O-methyl derivatives. On the other hand, lice alpha-glucosidase and green coffee bean and A. niger alpha-galactosidases had no hydrolyzing activities at all against the respective four monomethylated substrates.

  DOI：

  10.1080/07328300008544084

文献信息

• Studies on the substrate specificity of a GDP-mannose pyrophosphorylase from <i>Salmonella enterica</i>
  作者：Lu Zou、Ruixiang Blake Zheng、Todd L Lowary

  DOI：10.3762/bjoc.8.136

  日期：——

  A series of methoxy and deoxy derivatives of mannopyranose-1-phosphate (Manp-1P) were chemically synthesized, and their ability to be converted into the corresponding guanosine diphosphate mannopyranose (GDP-Manp) analogues by a pyrophosphorylase (GDP-ManPP) from Salmonella enterica was studied. Evaluation of methoxy analogues demonstrated that GDP-ManPP is intolerant of bulky substituents at the C-2, C-3, and C-4 positions, in turn suggesting that these positions are buried inside the enzyme active site. Additionally, both the 6-methoxy and 6-deoxy Manp-1P derivatives are good or moderate substrates for GDP-ManPP, thus indicating that the C-6 hydroxy group of the Manp-1P substrate is not required for binding to the enzyme. When taken into consideration with other previously published work, it appears that this enzyme has potential utility for the chemoenzymatic synthesis of GDP-Manp analogues, which are useful probes for studying enzymes that employ this sugar nucleotide as a substrate.

  一系列甲氧基和去氧衍生物的甘霖糖吡喷酸酯（Manp-1P）经化学合成，研究了它们通过一种来自沙门氏菌（Salmonella enterica）的焦磷酸化酶（GDP-ManPP）能否转化为相应的鸟苷二磷酸甘霖糖（GDP-Manp）类似物的能力。对甲氧基类似物的评价表明，GDP-ManPP对C-2、C-3和C-4位置的庞大取代基不耐受，进而暗示这些位置被埋藏在酶活性位点内部。此外，6-甲氧基和6-去氧 Manp-1P 衍生物均是GDP-ManPP的良好或中等底物，因此表明 Manp-1P 底物的C-6 羟基不是与酶结合所必需的。综合考虑先前发表的其他研究成果，这种酶似乎具有潜在的用途，可用于化酶合成 GDP-Manp 类似物，这些类似物是用于研究以这种糖核苷酸为底物的酶的有用探针。
• Paulsen, Hans; Springer, Matthias; Reck, Folkert, Liebigs Annalen, 1995, # 1, p. 53 - 66
  作者：Paulsen, Hans、Springer, Matthias、Reck, Folkert、Meinjohanns, Ernst、Brockhausen, Inka、Schachter, Harry

  DOI：——

  日期：——