2-[(2R,3R,4S,5S,6S)-3-hydroxy-6-methoxy-5-methyl-4-phenylmethoxyoxan-2-yl]acetaldehyde | 157219-91-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-[(2R,3R,4S,5S,6S)-3-hydroxy-6-methoxy-5-methyl-4-phenylmethoxyoxan-2-yl]acetaldehyde
• CAS: 157219-91-5
• 化学式: C₁₆H₂₂O₅
• 分子量: 294.348
• InChiKey: WTMUIQLXONTVIY-AMMHQNNLSA-N

物化性质

• 沸点：
  438.7±45.0 °C(predicted)
• 密度：
  1.17±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.56
• 拓扑面积：
  65
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  2-[(2R,3R,4S,5S,6S)-3-hydroxy-6-methoxy-5-methyl-4-phenylmethoxyoxan-2-yl]acetaldehyde 在 2,6-二甲基吡啶 、 sodium chlorite 、 sodium dihydrogenphosphate 、 N-碘代丁二酰亚胺 、 2-甲基-2-丁烯 、 三氟甲磺酸三甲基硅酯 、 potassium tert-butylate 、 三乙胺 、 苯磺酰氯 、 lithium hexamethyldisilazane 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 、 水 、 乙腈 、 叔丁醇 为溶剂， 反应 5.33h， 生成 ethyl (E,4R,5S)-5-[(2S,3R,4R)-3-[tert-butyl(dimethyl)silyl]oxy-4-methyl-5-oxooxolan-2-yl]-4-methyl-5-phenylmethoxypent-2-enoate
  参考文献：
  名称：

  Stereocontrolled Synthesis of the JKLM Ring Fragment of Ciguatoxin

  摘要：

  A highly stereocontrolled synthesis of the JKLM ring fragment of ciguatoxin has been achieved. The present synthesis starts with methyl 4,6-O-benzylidene-2-deoxy-2-C-methyl-a-D whose configurations and substituents at C2-C5 correspond to those at C46-C49 of ciguatoxin, and involves as the key step base-induced 7-endo selective cyclization of a hydroxy epoxide for the efficient construction of the fully substituted oxepane ring K. Construction of the spiroether ring M was achieved by introduction of an allyl group to the ring L lactone followed by asymmetric dihydroxylation to install the C54 stereogenic center and acid-induced spiroketalization to furnish the protected KLM ring system. Finally, ring J was constructed by the method of Nicolaou to complete the synthesis of the JKLM ring fragment. The synthesis of a carboxylic acid derivative and its conjugation to carrier proteins to give an artificial antigen for development of an immunoassay system for the parent toxin molecule are also reported.

  DOI：

  10.1021/jo990988j
• 作为产物：
  描述：

  2-[(2R,3R,4S,5S,6S)-3-hydroxy-6-methoxy-5-methyl-4-phenylmethoxyoxan-2-yl]acetonitrile 在 二异丁基氢化铝 、 盐酸 作用下， 以 正己烷 、 二氯甲烷 、 水 为溶剂， 反应 1.25h， 以12.38 g的产率得到2-[(2R,3R,4S,5S,6S)-3-hydroxy-6-methoxy-5-methyl-4-phenylmethoxyoxan-2-yl]acetaldehyde
  参考文献：
  名称：

  Stereocontrolled Synthesis of the JKLM Ring Fragment of Ciguatoxin

  摘要：

  A highly stereocontrolled synthesis of the JKLM ring fragment of ciguatoxin has been achieved. The present synthesis starts with methyl 4,6-O-benzylidene-2-deoxy-2-C-methyl-a-D whose configurations and substituents at C2-C5 correspond to those at C46-C49 of ciguatoxin, and involves as the key step base-induced 7-endo selective cyclization of a hydroxy epoxide for the efficient construction of the fully substituted oxepane ring K. Construction of the spiroether ring M was achieved by introduction of an allyl group to the ring L lactone followed by asymmetric dihydroxylation to install the C54 stereogenic center and acid-induced spiroketalization to furnish the protected KLM ring system. Finally, ring J was constructed by the method of Nicolaou to complete the synthesis of the JKLM ring fragment. The synthesis of a carboxylic acid derivative and its conjugation to carrier proteins to give an artificial antigen for development of an immunoassay system for the parent toxin molecule are also reported.

  DOI：

  10.1021/jo990988j