methyl 3-methyl-5-oxohexanoate | 14983-18-7

• 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 3-methyl-5-oxohexanoate
• CAS: 14983-18-7
• 化学式: C₈H₁₄O₃
• 分子量: 158.197
• InChiKey: QIZFMIXTHKTRJG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 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

• 作为反应物：
  描述：

  methyl 3-methyl-5-oxohexanoate 在 potassium tert-butylate 、 盐酸 作用下， 以 叔丁醇 、 四氢呋喃 、 水 为溶剂， 以53%的产率得到5-甲基环己烷-1,3-二酮
  参考文献：
  名称：

  Synthesis and Spectroscopic Characterization of [5-13C]- and [6-13C]Ubiquinone-10 for Studies of Bacterial Photosynthetic Reaction Centers

  摘要：

  This paper presents the synthesis and characterization by mass spectrometry and NMR spectroscopy of [2-C-13]- and [3-C-13]ubiquinone-0 and of [5-C-13]- and [6-C-13]ubiquinone-10. A scheme based on the synthetic approach to [5-C-13]ubiquinone-10 has been worked out for the synthesis of ubiquinones C-13-labeled at any individual position and at every combination of positions in the quinone ring. The [5-C-13]- and [6-C-13]ubiquinone-10 isotopomers were incorporated into the Q(A)-site of the photosynthetic reaction center of Rhodobacter sphaeroides R-26. Magic angle spinning NMR subsequently revealed an unperturbed 6-position, while the signal of the 5-position was absent. These results corroborate the recently reported detection of an asymmetric binding of Q(A) with a dynamic perturbation involving the 4-carbonyl functionality.

  DOI：

  10.1002/1099-0690(20021)2002:1<189::aid-ejoc189>3.0.co;2-8
• 作为产物：
  描述：

  3-甲基戊二酸酐 在 氯化亚砜 、 magnesium 作用下， 以 乙醚 为溶剂， 反应 4.0h， 生成 methyl 3-methyl-5-oxohexanoate
  参考文献：
  名称：

  Synthesis and Spectroscopic Characterization of [5-13C]- and [6-13C]Ubiquinone-10 for Studies of Bacterial Photosynthetic Reaction Centers

  摘要：

  This paper presents the synthesis and characterization by mass spectrometry and NMR spectroscopy of [2-C-13]- and [3-C-13]ubiquinone-0 and of [5-C-13]- and [6-C-13]ubiquinone-10. A scheme based on the synthetic approach to [5-C-13]ubiquinone-10 has been worked out for the synthesis of ubiquinones C-13-labeled at any individual position and at every combination of positions in the quinone ring. The [5-C-13]- and [6-C-13]ubiquinone-10 isotopomers were incorporated into the Q(A)-site of the photosynthetic reaction center of Rhodobacter sphaeroides R-26. Magic angle spinning NMR subsequently revealed an unperturbed 6-position, while the signal of the 5-position was absent. These results corroborate the recently reported detection of an asymmetric binding of Q(A) with a dynamic perturbation involving the 4-carbonyl functionality.

  DOI：

  10.1002/1099-0690(20021)2002:1<189::aid-ejoc189>3.0.co;2-8

文献信息

• Combined Effects on Selectivity in Fe-Catalyzed Methylene Oxidation
  作者：Mark S. Chen、M. Christina White

  DOI：10.1126/science.1183602

  日期：2010.1.29

  in organic molecules. Methylene C–H bonds are among the most difficult chemical bonds to selectively functionalize because of their abundance in organic structures and inertness to most chemical reagents. Their selective oxidations in biosynthetic pathways underscore the power of such reactions for streamlining the synthesis of molecules with complex oxygenation patterns. We report that an iron catalyst

  二级选择性有机分子主要由亚甲基（二级）CH2 基团的环和链组成，间歇性地装饰有氧或氮中心以及连接处更重取代的碳。如果沿着框架的任何特定亚甲基中的 C-H 键可以作为选择性修饰的目标，那么合成转化将是最有效的。然而，在大多数情况下，这些碳中心被证明非常难以区分用于反应目的。Chen 和 White (p. 566) 现在表明，铁催化剂可以引导过氧化物优先氧化一系列复杂分子中的特定二级 C-H 键，并具有合理的效率。观察到的选择性遵循与目标位点的电子和空间环境相关的可预测趋势。铁催化剂显示出对有机分子中二级 C-H 键氧化的选择性。亚甲基 C-H 键是最难选择性官能化的化学键之一，因为它们具有丰富的有机结构和对大多数化学试剂的惰性。它们在生物合成途径中的选择性氧化强调了这种反应在简化具有复杂氧化模式的分子合成方面的能力。我们报告说，铁催化剂可以在不同的天然产物环境中实现亚甲基 C-H 键氧化，
• Décomposition du percarbonate de<i>O</i>,<i>O</i>-<i>t</i>-butyle et<i>O</i>-isopropényle en solution: Acétonylation des esters, acides et nitriles
  作者：Robert Lalande、Claude Filliatre、Jean-Jacques Villenave、Rabih Jaouhari

  DOI：10.1002/hlca.19840670118

  日期：1984.2.1

  The Free-Radical Decomposition of O,O-t-Butyl and O-Isopropenyl Peroxycarbonate in Solution: the Acetonylation of Esters, Acides and Nitriles

  的自由基分解Ø，Ô -牛逼丁基和Ø异丙烯氧化碳的解决方案：酯类的酸酐和腈的Acetonylation
• DBU‐Catalyzed Ring‐Opening and Retro‐Claisen Fragmentation of Dihydropyranones
  作者：Anton Axelsson、Emmelie Hammarvid、Martin Rahm、Henrik Sundén

  DOI：10.1002/ejoc.202000858

  日期：2020.9.7

  We present a general protocol for the formal Michael addition of acetone to alpha,beta-unsaturated esters and amides, a transformation difficult to perform using current methods. The protocol comprises of an amidine catalyzed relay ring-opening and fragmentation of 3,4-dihydropyranones. The reaction proceeds under mild conditions, has a broad substrate scope and the products can be isolated in good

  我们提出了丙酮正式迈克尔加成到 α、β-不饱和酯和酰胺的一般协议，这是使用当前方法难以执行的转换。该协议包括脒催化的中继开环和 3,4-二氢吡喃酮的碎片化。该反应在温和的条件下进行，底物范围广，产物可以以良好到极好的收率分离。该方法可应用于完全保留手性信息的同手性底物，产生高光学纯度的产物。由量子化学模型支持的动力学实验表明，催化剂具有双功能作用，既充当布朗斯台德碱又充当氢键供体。
• <i>C</i>₂-Symmetric Chiral Malonamides for Asymmetric Michael Reaction
  作者：Sung-Ji Kim、Kyoungyim Lee、Sang-sup Jew、Hyeung-geun Park、Byeong-Seon Jeong

  DOI：10.1246/cl.2008.432

  日期：2008.4.5

  Described is the design and preparation of chiral C2-symmetric malonamides and their application to asymmetric conjugate addition to enone. The mechanism of partial racemization observed in the course of hydrolysis–decarboxylation step is also elucidated.

  描述了手性C2-对称丙二酰胺的设计和制备及其在烯酮不对称缀合加成中的应用。还阐明了在水解-脱羧步骤过程中观察到的部分外消旋作用的机制。
• Asymmetric synthesis of β-substituted δ-ketoesters via michael-additions of samp/ramp-hydrazones to α,β-unsaturated esters, virtually complete 1.6-asymmetric induction
  作者：Dieter Enders、Kyriakos Papadopoulos

  DOI：10.1016/s0040-4039(01)99823-5

  日期：1983.1

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