(E)-2-hydroxy-2-methylhex-4-en-3-one | 3246-24-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (E)-2-hydroxy-2-methylhex-4-en-3-one
• 英文别名: (E)-5-Hydroxy-5-methylhex-2-en-4-one；trans methyl-2 hexene-4 one-3 ol-2；2-hydroxy-2-methylhex-4-en-3-one；(E)-2-hydroxy-2-methyl-hex-4-en-3-one
• CAS: 3246-24-0
• 化学式: C₇H₁₂O₂
• 分子量: 128.171
• InChiKey: BOICBTFXAYDYLD-SNAWJCMRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.7
• 重原子数：
  9
• 可旋转键数：
  2
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  N-甲基-N-(亚甲基氨基)甲胺 、 (E)-2-hydroxy-2-methylhex-4-en-3-one 在 anhydrous zinc trifluoromethanesulfonate 作用下， 以 乙醚 为溶剂， 反应 24.5h， 生成
  参考文献：
  名称：

  N，N-二烷基hydr向α-羟基烯酮的对映选择性共轭加成。

  摘要：

  Zn（OTf）2 / tBuBOX催化剂对α-羟基烯酮的活化使得对映选择性共轭加成1-亚甲基氨基吡咯烷作为中性d1合成子。实验证据支持立体化学模型，其中三氟甲磺酸酯配体通过OH-OTf氢键控制催化剂-底物配合物的几何形状。β-氰基酸的合成说明了该方法的潜力。

  DOI：

  10.1021/ol071055+
• 作为产物：
  描述：

  (E)-3-Ethoxy-2-methylhexa-3,5-dien-2-ol 在 盐酸 作用下， 以 甲醇 、 水 为溶剂， 以90%的产率得到(E)-2-hydroxy-2-methylhex-4-en-3-one
  参考文献：
  名称：

  .alpha.,.beta.-Unsaturated Acetals as Precursors of .alpha.-Substituted Ethoxy Dienes. Useful Reagents for Nucleophilic Acylation

  摘要：

  The reaction of (E)-1,1-diethoxybut-2-ene (1a) and 1,1-diethoxy-3-methylbut-2-ene (1b) with 2 equiv of sec-butyllithium complexed with potassium tert-butoxide (Schlosser's base) in THF at -95 degrees C gives 1-metalated 1-ethoxy 1,3-dienes that are synthetically equivalent to acyl anions. Subsequent reaction with suitable electrophiles, such as alkyl halides, aldehydes, ketones, carbon dioxide, and carboxylic acid derivatives, affords (E)-1-substituted 1-ethoxy 1,3-dienes 2a-i. Experimental procedures are given for the reaction of the carbanionic intermediates with the electrophiles. Some typical examples for the conversion of the produced alpha-substituted alkoxy dienes into the corresponding alpha,beta-unsaturated carbonyl compounds are also reported. In particular, in the case in which crotonaldehyde is used as an electrophile, the addition product 2c undergoes acid-catalyzed conversion to compounds 4c, 5c, and 6c as a function of the experimental conditions.

  DOI：

  10.1021/jo00097a059

文献信息

• Highly Enantioselective Friedel−Crafts Alkylations of Pyrroles and Indoles with α‘-Hydroxy Enones under Cu(II)-Simple Bis(oxazoline) Catalysis
  作者：Claudio Palomo、Mikel Oiarbide、Bharat G. Kardak、Jesús M. García、Anthony Linden

  DOI：10.1021/ja0423217

  日期：2005.3.1

  Remarkably high and regular enantioselectivities are obtained in Friedel-Crafts alkylation reactions involving alpha'-hydroxy enone templates and Cu(II)-bis(oxazoline) complexes as catalysts. The simple elaboration of adducts provides a route to enantioenriched aldehydes, carboxylic acids, and ketones containing the pyrrole and indole frameworks.

  在涉及 α'-羟基烯酮模板和 Cu（II）-双（恶唑啉）配合物作为催化剂的 Friedel-Crafts 烷基化反应中获得了非常高和规则的对映选择性。加合物的简单加工为含有吡咯和吲哚骨架的对映体富集的醛、羧酸和酮提供了途径。
• Reactivite des gem-dibromocyclopropanes—IV
  作者：Christiane Santelli-Rouvier

  DOI：10.1016/0040-4020(81)85011-9

  日期：1981.1

  By acid catalysis, gem-dihalogenocyclopropylcarbinols are converted into homoallylic α-dihalogenated cations which in general eliminate the hydrogen halide and lead to the 3-halogenopentadienyl cations from which cyclopentenones can be formed by cyclisation. For bicyclo[4.1.0]heptanes, aromatisation of the 3-halogenopentadienyl cation in benzyl bromide is observed.

  通过酸催化，将宝石-二卤代环丙基羰基醇转化成均烯丙基的α-二卤代阳离子，该阳离子通常消除了卤化氢并生成了3-卤代戊二烯基阳离子，可以通过环化反应从中生成环戊烯酮。对于双环[4.1.0]庚烷，在苄基溴中观察到3-卤代戊二烯基阳离子的芳构化。
• Prandi Cristina, Venturello Paolo, J. Org. Chem., 59 (1994) N 18, S 5458-5462
  作者：Prandi Cristina, Venturello Paolo

  DOI：——

  日期：——
• SANTELLI-ROUVIER, C., TETRAHEDRON, 1981, 37, N 24, 4195-4200
  作者：SANTELLI-ROUVIER, C.

  DOI：——

  日期：——
• .alpha.,.beta.-Unsaturated Acetals as Precursors of .alpha.-Substituted Ethoxy Dienes. Useful Reagents for Nucleophilic Acylation
  作者：Cristina Prandi、Paolo Venturello

  DOI：10.1021/jo00097a059

  日期：1994.9

  The reaction of (E)-1,1-diethoxybut-2-ene (1a) and 1,1-diethoxy-3-methylbut-2-ene (1b) with 2 equiv of sec-butyllithium complexed with potassium tert-butoxide (Schlosser's base) in THF at -95 degrees C gives 1-metalated 1-ethoxy 1,3-dienes that are synthetically equivalent to acyl anions. Subsequent reaction with suitable electrophiles, such as alkyl halides, aldehydes, ketones, carbon dioxide, and carboxylic acid derivatives, affords (E)-1-substituted 1-ethoxy 1,3-dienes 2a-i. Experimental procedures are given for the reaction of the carbanionic intermediates with the electrophiles. Some typical examples for the conversion of the produced alpha-substituted alkoxy dienes into the corresponding alpha,beta-unsaturated carbonyl compounds are also reported. In particular, in the case in which crotonaldehyde is used as an electrophile, the addition product 2c undergoes acid-catalyzed conversion to compounds 4c, 5c, and 6c as a function of the experimental conditions.