methyl 4,6-O-benzylidene-3-deoxy-α-D-xylo-hexopyranoside | 20196-81-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: methyl 4,6-O-benzylidene-3-deoxy-α-D-xylo-hexopyranoside
• 英文别名: Methyl-<4,6-O-benzyliden-3-desoxy-α-D-gulosid>；α-Methyl-3-desoxy-4,6-benzyliden-D-galactopyranosid；4,6-O-Benzyliden-3-deoxy-α-D-xylo-methyl-hexosid；Methyl-(4,6-O-benzyliden-3-desoxy-α-D-gulosid)；(4aR,6S,7R,8aR)-6-methoxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-ol
• CAS: 20196-81-0
• 化学式: C₁₄H₁₈O₅
• 分子量: 266.294
• InChiKey: SGFFREHBBCJPJB-RCOGASTNSA-N

物化性质

• 熔点：
  163-164 °C
• 沸点：
  427.1±45.0 °C(predicted)
• 密度：
  1.27±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.22
• 重原子数：
  19.0
• 可旋转键数：
  2.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  57.15
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  methyl 4,6-O-benzylidene-3-deoxy-α-D-xylo-hexopyranoside 在 水 、 溶剂黄146 作用下， 反应 0.83h， 以63%的产率得到methyl 3-deoxy-α-D-galactopyranoside
  参考文献：
  名称：

  Synthesis and evaluation of 3″- and 4″-deoxy and -fluoro analogs of the immunostimulatory glycolipid, KRN7000

  摘要：

  Four 3 ''- and 4 ''-deoxy and -fluorogalactosyl ceramides were synthesized, and their ability to stimulate iNKT cells, based on levels of IL-2 production, was assessed in three NKT cell receptor hybridomas. In two of the hybridomas, 1.2 and 2H4, all of the analogs were immunostimulatory, while in the 1.4 hybridoma only the 4 ''-fluoro analog led to the production of significant levels of IL-2. (C) 2009 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2009.06.005
• 作为产物：
  描述：

  methyl 2-O-benzoyl-4,6-O-benzylidene-3-deoxy-α-D-galctopyranoside 在 甲醇 、 水 、 sodium hydroxide 作用下， 以 四氢呋喃 为溶剂， 反应 4.0h， 以97%的产率得到methyl 4,6-O-benzylidene-3-deoxy-α-D-xylo-hexopyranoside
  参考文献：
  名称：

  Synthesis and evaluation of 3″- and 4″-deoxy and -fluoro analogs of the immunostimulatory glycolipid, KRN7000

  摘要：

  Four 3 ''- and 4 ''-deoxy and -fluorogalactosyl ceramides were synthesized, and their ability to stimulate iNKT cells, based on levels of IL-2 production, was assessed in three NKT cell receptor hybridomas. In two of the hybridomas, 1.2 and 2H4, all of the analogs were immunostimulatory, while in the 1.4 hybridoma only the 4 ''-fluoro analog led to the production of significant levels of IL-2. (C) 2009 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2009.06.005

文献信息

• Synthesis of methyl O-α-L-rhamnopyranosyl-(1 → 2)-α-d-galactopyranosides specifically deoxygenated at position 3, 4, or 6 of the galactose residue
  作者：Laurence A. Mulard、Pavol Kovác̆、Cornelis P.J. Glaudemans

  DOI：10.1016/0008-6215(94)84287-6

  日期：1994.1

  4-tri-O-benzoyl-alpha-L-rhamnopyranosyl bromide with suitably protected, deoxygenated derivatives of methyl alpha-D-galactopyranoside. Deoxygenation was achieved via activation of a protected methyl alpha-D-gluco- or galacto-pyranoside with N,N'-thiocarbonyldiimidazole followed by treatment with tributyltin hydride and azobisisobutyronitrile. At position 3, the deoxygenation was more successful when performed with

  通过将2,3,4-三-O-苯甲酰基-α-L-鼠李糖基吡喃糖基溴化物与适当保护的甲基α-D-吡喃半乳糖苷的脱氧衍生物缩合来合成标题二糖。通过用N，N'-硫代羰基二咪唑活化被保护的甲基α-D-葡萄糖或半乳糖吡喃糖苷，然后用氢化三丁基锡和偶氮二异丁腈处理，可以实现脱氧。在位置3，当用三-O-苯甲酰化的前体而不是三-O-苄基化的前体进行脱氧更成功。通过甲基3-脱氧-α-D-木糖己吡喃糖苷的苄基化获得相应的亲核试剂。可以从具有D-半乳糖或D-葡萄糖构型的衍生物开始进行在位置4上脱氧的糖基受体的制备。