Ethyl (2E,11R)-11-(benzyloxy)dodec-2-en-8-ynoate | 152896-83-8

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: Ethyl (2E,11R)-11-(benzyloxy)dodec-2-en-8-ynoate
• CAS: 152896-83-8
• 化学式: C₂₁H₂₈O₃
• 分子量: 328.452
• InChiKey: QBNTWZNICDZXBN-XEYRCQSKSA-N

物化性质

• 沸点：
  439.2±45.0 °C(predicted)
• 密度：
  1.013±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.66
• 重原子数：
  24.0
• 可旋转键数：
  10.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  35.53
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  Ethyl (2E,11R)-11-(benzyloxy)dodec-2-en-8-ynoate 在 咪唑 、 titanium(IV) isopropylate 、 叔丁基过氧化氢 、 4 A molecular sieve 、 二异丁基氢化铝 、 (+)-Weinsaeure-diethylester 作用下， 以 乙醚 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 8.5h， 生成 (2R,10S,11S)-2-(Benzyloxy)-10,11-epoxy-12-(tert-butyldimethylsiloxy)-4-dodecyne
  参考文献：
  名称：

  Total synthesis of patulolide C and its homo-, nor, and iso analogs

  摘要：

  The stereospecific total synthesis of the naturally occurring macrolide patulolide C 19Eb as well as its iso, nor, and homo analogs is described by applying the photoinduced rearrangement of enantiomerically pure epoxy diazomethyl ketones 14 to gamma-hydroxy alpha,beta-unsaturated esters 15 as the key step. The required epoxy diazomethyl ketones 14 are obtained by a Sharpless epoxidation of an appropriate allylic alcohol, followed by ruthenium tetraoxide oxidation to an oxiranecarboxylic acid, conversion into a mixed anhydride, and treatment with diazomethane. Macrolide 19Zb, which is a geometrical isomer of 19Eb, turned out to be a diastereomer of natural macrolide isopatulolide C, which implies the 4R,11R configuration for this natural material. X-ray diffraction analyses of 19Ea and 19Eb show that there is a considerable difference in spatial arrangement; particularly, the different torsion angles between the carbonyl and olefinic bonds are note worthy. The conformational behavior of these macrolides is also deduced from the NMR and UV spectra.

  DOI：

  10.1021/jo00077a047
• 作为产物：
  描述：

  (R)-9-(Benzyloxy)-6-decyn-1-ol 在 草酰氯 、 二甲基亚砜 、 三乙胺 、 N,N-二异丙基乙胺 、 lithium chloride 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 0.58h， 生成 Ethyl (2E,11R)-11-(benzyloxy)dodec-2-en-8-ynoate
  参考文献：
  名称：

  Total synthesis of patulolide C and its homo-, nor, and iso analogs

  摘要：

  The stereospecific total synthesis of the naturally occurring macrolide patulolide C 19Eb as well as its iso, nor, and homo analogs is described by applying the photoinduced rearrangement of enantiomerically pure epoxy diazomethyl ketones 14 to gamma-hydroxy alpha,beta-unsaturated esters 15 as the key step. The required epoxy diazomethyl ketones 14 are obtained by a Sharpless epoxidation of an appropriate allylic alcohol, followed by ruthenium tetraoxide oxidation to an oxiranecarboxylic acid, conversion into a mixed anhydride, and treatment with diazomethane. Macrolide 19Zb, which is a geometrical isomer of 19Eb, turned out to be a diastereomer of natural macrolide isopatulolide C, which implies the 4R,11R configuration for this natural material. X-ray diffraction analyses of 19Ea and 19Eb show that there is a considerable difference in spatial arrangement; particularly, the different torsion angles between the carbonyl and olefinic bonds are note worthy. The conformational behavior of these macrolides is also deduced from the NMR and UV spectra.

  DOI：

  10.1021/jo00077a047