乙酰乙醛 | 625-34-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 乙酰乙醛
• 英文名称: 3-oxobutyraldehyde
• 英文别名: Acetoacetaldehyde；3-oxobutanal
• CAS: 625-34-3
• 化学式: C₄H₆O₂
• 分子量: 86.0904
• InChiKey: PKQIDSVLSKFZQC-UHFFFAOYSA-N

物化性质

• 沸点：
  30 °C(Press: 24 Torr)
• 密度：
  1.097 g/cm3

计算性质

• 辛醇/水分配系数(LogP)：
  -0.4
• 重原子数：
  6
• 可旋转键数：
  2
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  34.1
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 海关编码：
  2914400090

反应信息

• 作为反应物：
  描述：

  乙酰乙醛 在 盐酸 、 sodium nitrite 作用下， 以 水 为溶剂， 反应 0.5h， 生成 2-(hydroxyimino)-3-oxobutanal
  参考文献：
  名称：

  Reaction of alkyl- and arylamines with 2-(hydroxyimino)-3-oxobutanal

  摘要：

  The condensation of 2-(hydroxyimino)-3-oxobutanal with primary aliphatic amines, cyclohexanamine, and amines containing an adamantane fragment afforded 4-(alkylamino)- and 4-(cyclohexylamino)- 3nitrosobut- 3-en-2-ones. Analogous reaction with substituted anilines RC6H4NH2 (R = H, 4-Me, 4-OMe, 4-NH2, 4-Br, 4- I, 3-NO2) led to the formation of 4-aryl-3-hydroxyiminobutan-2-ones.

  DOI：

  10.1134/s1070428017010018
• 作为产物：
  描述：

  1-甲基1-环丙醇 在 chromium(VI) oxide 作用下， 以 高氯酸 为溶剂， 生成 乙酰乙醛
  参考文献：
  名称：

  Chromic acid oxidation of cyclopropanols

  摘要：

  DOI：

  10.1021/ja00855a036

文献信息

• Pr(OTf)₃ as an Efficient and Recyclable Catalyst for Chemoselective Thioacetalization of Aldehydes
  作者：Surya De

  DOI：10.1055/s-2004-834858

  日期：——

  Praseodymium triflate has been found to be an efficient and recyclable catalyst for chemoselective protection of aldehydes.

  三氟甲磺酸镨已被发现是一种高效且可循环的催化剂，适用于醛的选择性保护反应。
• [EN] SUBSTITUTED PYRROLO[1,2-A]PYRIMIDINES AND THEIR USE IN THE TREATMENT OF MEDICAL DISORDERS<br/>[FR] PYRROLO[1,2-A]PYRIMIDINES SUBSTITUÉES ET LEUR UTILISATION DANS LE TRAITEMENT DE TROUBLES MÉDICAUX
  申请人：LYSOSOMAL THERAPEUTICS INC

  公开号：WO2016073891A1

  公开（公告）日：2016-05-12

  The invention provides substituted pyrrolo[l,2-a]pyrimi dines and related organic compounds, compositions containing such compounds, medical kits, and methods for using such compounds and compositions to treat medical disorders, e.g., Gaucher disease, Parkinson's disease, Lewy body disease, dementia, or multiple system atrophy, in a patient. Exemplary substituted pyrrolo[1,2-a]pyrimidines compounds described herein include substituted 2,4-dimethyl-N-phenylpyrrolo[l,2-a]pyrimidine-8-carboxamide compounds and variants thereof.

  该发明提供了取代的吡咯并[1,2-a]嘧啶和相关的有机化合物，包含这种化合物的组合物，医疗工具包，以及使用这种化合物和组合物治疗疾病的方法，例如高雪氏病、帕金森病、路易体病、痴呆症或多系统萎缩症等。本文描述的示例取代的吡咯并[1,2-a]嘧啶化合物包括取代的2,4-二甲基-N-苯基吡咯并[1,2-a]嘧啶-8-羧酰胺化合物及其变体。
• Polyketide syntheses: condensations of keto esters with anionic electrophiles
  作者：T. M. Harris、T. P. Murray、C. M. Harris、M. Gumulka

  DOI：10.1039/c39740000362

  日期：——

  Condensation of multiple anions of acetoacetic and 3,5-dioxohexanoic esters with monoanions of β-ketoesters and β-keto-aldhydes provide a new approach to β-polyketo-esters and related products having biosynthetic significance.

  乙乙酸酯和3,5-二氧己酸酯的多个阴离子与β-酮酸酯和β-酮-醛单阴离子的缩合为β-聚酮酯及其相关产品具有生物合成意义提供了一种新方法。
• Stereoselective control in the Staudinger reactions involving monosubstituted ketenes with electron acceptor substituents: experimental investigation and theoretical rationalization
  作者：Hengzhen Qi、Xinyao Li、Jiaxi Xu

  DOI：10.1039/c0ob00783h

  日期：——

  The stereoselectivity of the Staudinger reactions involving monosubstituted ketenes with electron acceptor substituents was investigated experimentally by determination of the product stereochemistry and theoretically via DFT calculations. The results indicate that imines preferentially attack the less sterically hindered exo-side of the ketenes to generate zwitterionic intermediates. Subsequently, for cyclic imines, the intermediates undergo a conrotatory ring closure directly to produce β-lactams, while for linear imines, the imine moiety of the intermediates isomerizes to more stable intermediates, which further undergo a conrotatory ring closure to afford trans-β-lactams. The steric hindrance and the isomerization, rather than the torquoelectronic effect, play crucial roles in controlling the stereoselectivity in the practical Staudinger reactions involving monosubstituted ketenes with electron acceptor substituents, although the unaccessible borylketene with a powerful electron acceptor group controls the stereoselectivity torquoelectronically, in theory.

  通过确定产物立体化学和基于密度泛函理论（DFT）的计算，实验上研究了涉及带有电子受体取代基的单取代乙烯酮的斯陶丁格反应的立体选择性。结果表明，亚胺优先攻击乙烯酮上立体障碍较小的外侧，生成内鎓离子中间体。随后，对于环状亚胺，中间体直接进行协同环合反应生成β-内酰胺；而对于线性亚胺，中间体的亚胺部分异构化为更稳定的中间体，后者进一步进行协同环合反应，产生反式β-内酰胺。在实际涉及带有电子受体取代基的单取代乙烯酮的斯陶丁格反应中，立体障碍和异构化而不是扭曲电子效应在控制立体选择性中起着关键作用，尽管在理论上，具有强电子受体基团的不可获得的硼乙烯酮通过扭曲电子效应控制立体选择性。
• Tropylium salts as efficient organic Lewis acid catalysts for acetalization and transacetalization reactions in batch and flow
  作者：D. J. M. Lyons、R. D. Crocker、D. Enders、T. V. Nguyen

  DOI：10.1039/c7gc01519d

  日期：——

  carbonyl compounds. Herein we demonstrate for the first time that tropylium salts can act as organic Lewis acid catalysts to facilitate acetalization and transacetalization reactions of a wide range of aldehyde substrates. This metal-free method works efficiently in both batch and flow conditions, prompting further future applications of tropylium organocatalysts in green synthesis.

  羰基化反应在羰基化合物重要的掩蔽化学中起着重要的作用。在本文中，我们首次证明了对钾盐可以用作有机路易斯酸催化剂，以促进各种醛底物的缩醛化和反缩醛化反应。这种无金属方法在间歇和流动条件下均能有效工作，从而促进了对硝基有机催化剂在绿色合成中的进一步应用。