Methyl 2,2-dimethyl-5-oxopentanoate | 112009-51-5

• 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: Methyl 2,2-dimethyl-5-oxopentanoate
• CAS: 112009-51-5
• 化学式: C₈H₁₄O₃
• 分子量: 158.197
• InChiKey: ZRMAGMSYRAINHQ-UHFFFAOYSA-N

物化性质

• 沸点：
  215.0±23.0 °C(Predicted)
• 密度：
  0.979±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  11
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2,2-dimethoxy-3,3-dimethyldihydropyran 在 oxonium 作用下， 以 1,4-二氧六环 为溶剂， 生成 Methyl 2,2-dimethyl-5-oxopentanoate
  参考文献：
  名称：

  酸催化的2,2-二甲氧基-3,4-二氢吡喃类化合物水解为3,4-二氢-α-吡喃酮和δ-酮酸酯的机理和合成方面

  摘要：

  酸催化的2,2-二甲氧基-3,4-二氢吡喃（）水解生成δ-酮酸酯（）和3,4-二氢-α-吡喃酮（）的混合物。当在水/二氯甲烷的两相系统中进行水解时，随着在3位，5位和6位烷基的取代增加而增加的量。结果表明，甲醇直接由形成，而甲醇则由甲醇直接形成。讨论了这些水解反应的机理和合成方面。

  DOI：

  10.1016/s0040-4039(00)95431-5

文献信息

• ——
  作者：Torsten Zytowski、Bernhard Knühl、Hanns Fischer

  DOI：10.1002/(sici)1522-2675(20000315)83:3<658::aid-hlca658>3.0.co;2-z

  日期：2000.3.15

  Absolute rate constants and some of their Arrhenius parameters were obtained by time-resolved electron spin resonance (ESR) spectroscopy for the addition of the 2-(alkoxycarbonyl)propan-2-yl and 3,3,3-trifluoroacetonyl (= 3,3,3-trifluoro-2-oxopropyl) radicals to a variety of mono- and 1,1-disubstituted alkenes. Their analysis shows that the addition of 2-(alkoxycarbonyl)propan-2-yl is mainly governed by the exothermicity of the reaction with slight modifications by nucleophilic and electrophilic effects giving rise to an overall ambiphilic behavior. In contrast, large electrophilic polar effects dominate the addition of the 3,3,3-trifluoroacetonyl (= 3,3,3-frifluoro-2-oxopropan-2-yl) radical, as it is expected from its large electron affinity. For both radicals, the activation energies are well-predicted by analytic equations for the enthalpic and polar terms. A comparison of the rate data of 2-(alkoxycarbonyl)propan-2-yl with the homo- and copolymerization rate constants of the propagating radical of methyl methacrylate shows that the additions of these structurally related low- and high-molecular-weight radicals to alkenes are governed by very similar effects.
• SCHEEREN J. W.; BAKKER C. G.; PEPERZAK R.; NIVARD R. J. F., TETRAHEDRON LETT., 28,(1987) N 16, 1821-1824
  作者：SCHEEREN J. W.、 BAKKER C. G.、 PEPERZAK R.、 NIVARD R. J. F.

  DOI：——

  日期：——
• Mechanistic and synthetic aspects of the acid-catalysed hydrolysis of 2,2-dimethoxy-3,4-dihydropyrans into 3,4-dihydro-α-pyrones and δ-keto esters
  作者：J.W. Scheeren、C.G. Bakker、R. Peperzak、R.J.F. Nivard

  DOI：10.1016/s0040-4039(00)95431-5

  日期：1987.1

  Acid-catalysed hydrolysis of 2,2-dimethoxy-3,4-dihydropyrans () yields mixtures of δ-keto esters () and 3,4-dihydro-α-pyrones (). The amount of increases with increasing alkyl substitution in the 3-, 5- and 6-position of and when the hydrolysis is carried out in a two-phases system of water/dichloromethane. It is shown that is formed directly from whereas is formed directly from and by methanolysis

  酸催化的2,2-二甲氧基-3,4-二氢吡喃（）水解生成δ-酮酸酯（）和3,4-二氢-α-吡喃酮（）的混合物。当在水/二氯甲烷的两相系统中进行水解时，随着在3位，5位和6位烷基的取代增加而增加的量。结果表明，甲醇直接由形成，而甲醇则由甲醇直接形成。讨论了这些水解反应的机理和合成方面。