2-(2-methoxyethoxy)ethyl octanoate

• 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: 2-(2-methoxyethoxy)ethyl octanoate
• 化学式: C₁₃H₂₆O₄
• 分子量: 246.347
• InChiKey: NEWGABCOTVHLJX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  17
• 可旋转键数：
  13
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  辛酰氯 、 alkaline earth salt of/the/ methylsulfuric acid 在 sodium tetrahydroborate 、 三乙胺 、 lithium chloride 作用下， 反应 5.0h， 生成 2-(2-methoxyethoxy)ethyl octanoate
  参考文献：
  名称：

  Reductions of Carboxylic Acids and Esters with NaBH₄ in Diglyme at 162°C

  摘要：

  Aromatic esters, including the extremely sterically hindered ester: t-amyl 2-chlorobenzoate, are readily reduced to the corresponding benzyl alcohols in high yield with NaBH4 in refluxing diglyme (162 degreesC). In sharp contrast, aliphatic esters usually gave only low yields of alcohols. Instead, diglyme fragmentation products are formed which undergo transesterification reactions, producing complex product mixtures including products such as RCOOCH2CH2OCH3. The mechanism of this process involves sodium borohydride-induced S(N)2 cleavage of diglyme (hydride attack) at high temperatures. However, when the extremely electron rich, 3,4,5-trimethoxybenzoic acid is treated with NaBH4/diglyme at 162 degreesC (with or without an equivalent of LiCl), no 3,4,5-trimethyoxybenzyl alcohol is formed. The electron rich and hindered ester, t-amyl-3,4,5-trimethoxybenzoate, also does not reduce under these conditions (with or without LiCl). However, both methyl and isopropyl 3,4,5-trimethoxybenzoate esters were converted into 3,4,5-trimethyoxybenzyl alcohol in good yields in NaBH4/diglyme/LiCl at 162 degreesC. These reductions did not occur unless LiCl was present, illustrating the electron releasing effect of the three methoxy functions which reduce the carbonyl group's reactivity.

  DOI：

  10.1081/scc-120018935

文献信息

• US4585565A
  申请人：——

  公开号：US4585565A

  公开（公告）日：1986-04-29
• US4618441A
  申请人：——

  公开号：US4618441A

  公开（公告）日：1986-10-21
• Reductions of Carboxylic Acids and Esters with NaBH₄ in Diglyme at 162°C
  作者：Hua-Jie Zhu、Charles U. Pittman

  DOI：10.1081/scc-120018935

  日期：2003.1.6

  Aromatic esters, including the extremely sterically hindered ester: t-amyl 2-chlorobenzoate, are readily reduced to the corresponding benzyl alcohols in high yield with NaBH4 in refluxing diglyme (162 degreesC). In sharp contrast, aliphatic esters usually gave only low yields of alcohols. Instead, diglyme fragmentation products are formed which undergo transesterification reactions, producing complex product mixtures including products such as RCOOCH2CH2OCH3. The mechanism of this process involves sodium borohydride-induced S(N)2 cleavage of diglyme (hydride attack) at high temperatures. However, when the extremely electron rich, 3,4,5-trimethoxybenzoic acid is treated with NaBH4/diglyme at 162 degreesC (with or without an equivalent of LiCl), no 3,4,5-trimethyoxybenzyl alcohol is formed. The electron rich and hindered ester, t-amyl-3,4,5-trimethoxybenzoate, also does not reduce under these conditions (with or without LiCl). However, both methyl and isopropyl 3,4,5-trimethoxybenzoate esters were converted into 3,4,5-trimethyoxybenzyl alcohol in good yields in NaBH4/diglyme/LiCl at 162 degreesC. These reductions did not occur unless LiCl was present, illustrating the electron releasing effect of the three methoxy functions which reduce the carbonyl group's reactivity.