octadecyl mandelate

• 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: octadecyl mandelate
• 英文别名: Octadecyl 2-hydroxy-2-phenylacetate
• 化学式: C₂₆H₄₄O₃
• 分子量: 404.634
• InChiKey: RZPFWMVHVUOASO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  10
• 重原子数：
  29
• 可旋转键数：
  20
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  硬脂醇 、 扁桃酸 在 水杨醛 作用下， 以 甲苯 为溶剂， 反应 30.0h， 以81%的产率得到octadecyl mandelate
  参考文献：
  名称：

  水杨醛通过诱导的分子内作用催化α-羟基酸的化学选择性酯化†

  摘要：

  使用可逆的共价结合策略开发了一种新的，直接的和化学选择性的α-羟基酸酯化方法。通过利用缩醛化学，可以使用简单的醛在等于或超过醇的量的β-羟基酸部分或其他羧酸的存在下有效地催化α-羟基羧酸的酯化。用10 mol％廉价的市售水杨醛催化的1°和2°醇将各种α-芳基，α-烷基，α-杂芳基和官能化的α-羟基酸平稳地酯化，从而在83-在简单的碱性水溶液处理中除去未反应的羟基酸后，产率为95％。此外，水杨醛可通过真空蒸馏或硅胶纯化回收，从而达到绿色化学标准。机理研究证明，共价加合物的形成III在我们建议的催化循环中（方案1A）负责真正的催化作用。

  DOI：

  10.1039/c2ra23068b

文献信息

• Nucleophilic Acyl Substitutions of Esters with Protic Nucleophiles Mediated by Amphoteric, Oxotitanium, and Vanadyl Species
  作者：Chien-Tien Chen、Jen-Huang Kuo、Cheng-Hsiu Ku、Shiue-Shien Weng、Cheng-Yuan Liu

  DOI：10.1021/jo0484878

  日期：2005.2.1

  [GRAPHICS]A diverse array of oxometallic species were examined as catalysts in nucleophilic acyl substitution (NAS) reactions of methyl (or ethyl) esters with protic nucleophiles. Among them, oxotitanium acetylacetonate (TiO(acac)(2)) and vanadyl chloride (VOCl2-(THF)(x)) served as the most efficient and water-tolerant catalysts. Transesterifications of methyl and/or ethyl esters with functionalized (including acid- or base-sensitive) 1degrees and 2degrees alcohols can be carried out chemoselectively in refluxed toluene or xylene in a 1:1 substrate stoichiometry using 1 mol % catalyst loading. The resultant products were furnished in 85-100% yields by simple aqueous workup to remove water-soluble catalysts. The new NAS protocol is also amenable to amines and thiols in 74-91% yields, albeit with higher loading (2.5 equiv) of protic nucleophiles. Representative examples of commercial interests such as Padimate 0 and antioxidant additives for plastics were also examined to demonstrate their practical applications. A 1:1 adduct between TiO(acac)2 and a given 1-octadecanol was identified as (C18H37O)(2)Ti(acac)(2) and was responsible for its subsequent NAS of methyl esters.
• Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity
  作者：Shiue-Shien Weng、Hsin-Chun Li、Teng-Mao Yang

  DOI：10.1039/c2ra23068b

  日期：——

  direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficiently catalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl

  使用可逆的共价结合策略开发了一种新的，直接的和化学选择性的α-羟基酸酯化方法。通过利用缩醛化学，可以使用简单的醛在等于或超过醇的量的β-羟基酸部分或其他羧酸的存在下有效地催化α-羟基羧酸的酯化。用10 mol％廉价的市售水杨醛催化的1°和2°醇将各种α-芳基，α-烷基，α-杂芳基和官能化的α-羟基酸平稳地酯化，从而在83-在简单的碱性水溶液处理中除去未反应的羟基酸后，产率为95％。此外，水杨醛可通过真空蒸馏或硅胶纯化回收，从而达到绿色化学标准。机理研究证明，共价加合物的形成III在我们建议的催化循环中（方案1A）负责真正的催化作用。