Ethyl (Z)-2,2-difluorooctadec-13-enoate | 321856-67-1

• 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 (Z)-2,2-difluorooctadec-13-enoate
• 英文别名: ethyl (Z)-2,2-difluoro-13-octadecenoate
• CAS: 321856-67-1
• 化学式: C₂₀H₃₆F₂O₂
• 分子量: 346.501
• InChiKey: FISOAGKGMRJQCV-FPLPWBNLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.5
• 重原子数：
  24
• 可旋转键数：
  17
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.85
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  Ethyl (Z)-2,2-difluorooctadec-13-enoate 在 lithium aluminium tetrahydride 、 草酰氯 、 二甲基亚砜 、 三乙胺 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 1.0h， 生成 (Z)-2,2-Difluoro-octadec-13-enal
  参考文献：
  名称：

  New fluorinated derivatives as esterase inhibitors. Synthesis, hydration and crossed specificity studies

  摘要：

  A variety of new fluorinated chemicals have been prepared for the first time and tested as inhibitors of esterases, one of the main enzymes involved in pheromone catabolism, in two economically important pests, the Egyptian armyworm Spodoptera littoralis (SL) and the Mediterranean corn borer Sesamia nonagrioides (SN). Using the respective major component of the pheromone as substrate, the K-m and V-max of the antennal esterase of both insects resulted to be 5.66 x 10(-4) M and 8.47 x 10(-6) Mmin(-1) for SL and 1.61 x 10(-7) M and 1.25 x 10(-7) Mmin(-1) for SN, pointing out that SN esterase has a higher affinity for its corresponding substrate than SL. In general, the trifluoromethyl ketones (TFMKs) exhibited higher inhibitory potency than the corresponding difluoromethyl ketones (DFMKs) or difluoroaldehydes (DFAs). The compounds appeared to hydrate differently in aqueous solution, the extent of hydration following the order: alpha,alpha-DFMKs

  DOI：

  10.1016/s0968-0896(02)00467-4
• 作为产物：
  描述：

  Ethyl (Z)-2,2-difluoro-3-hydroxyoctadec-13-enoate 在 二叔丁基过氧化物 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 Diphenylphosphine oxide 作用下， 以 1,4-二氧六环 、 N,N-二甲基甲酰胺 为溶剂， 反应 3.0h， 生成 Ethyl (Z)-2,2-difluorooctadec-13-enoate
  参考文献：
  名称：

  烷基、烯基和芳基烷基α,α-二氟酯作为昆虫信息素分解代谢潜在抑制剂前体的实用高效合成

  摘要：

  报告了一种以二苯基氧化膦和二叔丁基过氧化物为引发剂，通过还原裂解相应的 S-甲基二硫代碳酸酯来合成长链烷基、烯基和芳基烷基δ,δ-二氟酯的有效方法。δ±,δ±-二氟酯 4a-j 是首次以良好的总产率分离出来的。该方法的一个局限性是底物中存在对自由基敏感的官能团，如二取代的双键或三键，因为膦酰基同时加到不饱和碳上可能会引起双键的异构化或聚合。如果需要立体纯烯基 δ,δ-二氟酯，建议对乙炔基前驱体的 S-甲基二硫代碳酸酯进行还原裂解，然后进行立体选择性氢化反应生成烯烃。

  DOI：

  10.1055/s-2000-8226

文献信息

• New fluorinated derivatives as esterase inhibitors. Synthesis, hydration and crossed specificity studies
  作者：Carmen Quero、Gloria Rosell、Oscar Jiménez、Sergio Rodriguez、M.Pilar Bosch、Angel Guerrero

  DOI：10.1016/s0968-0896(02)00467-4

  日期：2003.3

  A variety of new fluorinated chemicals have been prepared for the first time and tested as inhibitors of esterases, one of the main enzymes involved in pheromone catabolism, in two economically important pests, the Egyptian armyworm Spodoptera littoralis (SL) and the Mediterranean corn borer Sesamia nonagrioides (SN). Using the respective major component of the pheromone as substrate, the K-m and V-max of the antennal esterase of both insects resulted to be 5.66 x 10(-4) M and 8.47 x 10(-6) Mmin(-1) for SL and 1.61 x 10(-7) M and 1.25 x 10(-7) Mmin(-1) for SN, pointing out that SN esterase has a higher affinity for its corresponding substrate than SL. In general, the trifluoromethyl ketones (TFMKs) exhibited higher inhibitory potency than the corresponding difluoromethyl ketones (DFMKs) or difluoroaldehydes (DFAs). The compounds appeared to hydrate differently in aqueous solution, the extent of hydration following the order: alpha,alpha-DFMKs
• Practical and Efficient Synthesis of Alkyl, Alkenyl and Aryl-alkyl α,α-Difluoro Esters as Precursors of Potential Inhibitors of the Pheromone Catabolism in Insects
  作者：Oscar Jiménez、Maria Pilar Bosch、Angel Guerrero

  DOI：10.1055/s-2000-8226

  日期：——

  An efficient method for the synthesis of long chain alkyl, alkenyl and aryl-alkyl α,α-difluoro esters through reductive cleavage of the corresponding S-methyl dithiocarbonates with diphenylphosphine oxide and di-tert-butyl peroxide as initiator is reported. The α,α-difluoro esters 4a-j have been obained for the first time and in good overall yields. A limitation of the method is the presence of radical-sensitive functions, such as disubstituted double or triple bonds, in the substrate since the concomitant addition of the phosphonyl radical to the unsaturated carbons may induce isomerization of the double bond or polymerization. If stereomerically pure alkenyl α,α-difluoro esters are required, it is suggested to run the reductive cleavage on the S-methyl dithiocarbonate of the acetylenic precursor followed by stereoselective hydrogenation to the alkene.

  报告了一种以二苯基氧化膦和二叔丁基过氧化物为引发剂，通过还原裂解相应的 S-甲基二硫代碳酸酯来合成长链烷基、烯基和芳基烷基δ,δ-二氟酯的有效方法。δ±,δ±-二氟酯 4a-j 是首次以良好的总产率分离出来的。该方法的一个局限性是底物中存在对自由基敏感的官能团，如二取代的双键或三键，因为膦酰基同时加到不饱和碳上可能会引起双键的异构化或聚合。如果需要立体纯烯基 δ,δ-二氟酯，建议对乙炔基前驱体的 S-甲基二硫代碳酸酯进行还原裂解，然后进行立体选择性氢化反应生成烯烃。