3-(2,4-dimethoxyphenyl)-2-cyclohexen-1-one

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 3-(2,4-dimethoxyphenyl)-2-cyclohexen-1-one
• 英文别名: 3-(2,4-Dimethoxyphenyl)cyclohex-2-en-1-one
• 化学式: C₁₄H₁₆O₃
• 分子量: 232.279
• InChiKey: WJIPPMKCSRCTLO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  2-环己烯-1-酮 、 2,4-二甲氧基苯甲酸 在 palladium(II) trifluoroacetate silver carbonate 作用下， 以 二甲基亚砜 、 N,N-二甲基甲酰胺 为溶剂， 反应 0.5h， 以90%的产率得到3-(2,4-dimethoxyphenyl)-2-cyclohexen-1-one
  参考文献：
  名称：

  Development of a Decarboxylative Palladation Reaction and Its Use in a Heck-type Olefination of Arene Carboxylates

  摘要：

  The development of a palladium-catalyzed decarboxylative coupling reaction of arene carboxylates with olefinic substrates is described. The optimized procedure for decarboxylative palladation employs Pd(O2CCF3)2 as catalyst (0.2 equiv) in the presence of Ag2CO3 (3 equiv) in the solvent 5% DMSO-DMF and proceeds at temperatures of 80-120 degrees C with a wide range of arene carboxylates and alkenes as substrates. The process is proposed to proceed by an initial Ar-SE reaction involving ipso attack of an electrophilic Pd(II) intermediate on an arene carboxylate to form an arylpalladium(II) species with loss of carbon dioxide. This intermediate is then proposed to react with an olefinic substrate by steps common to the Heck coupling process. Reoxidation of the liberated Pd(0) in situ is proposed to establish the catalytic cycle.

  DOI：

  10.1021/ja027523m

文献信息

• Selective Heck reaction of electron-rich aryl bromides with cyclic alkenones
  作者：Tarak Nath Gowala、Jagadish Pabba

  DOI：10.1016/j.tetlet.2015.02.045

  日期：2015.4

  A simple and efficient protocol for the Heck reaction of cyclic alkenones with electron-rich aryl bromides has been developed. A ligand combination of X-Phos and tri-tert-butylphosphonium hydrogen tetrafluorborate in the presence of Pd(PPh3)(2)Cl-2 and Na2CO3 in DMSO was found to be efficient and selective for electron-rich aryl bromides with high substrate scope for cyclic alkenones. (C) 2015 Elsevier Ltd. All rights reserved.
• Development of a Decarboxylative Palladation Reaction and Its Use in a Heck-type Olefination of Arene Carboxylates
  作者：Andrew G. Myers、Daisuke Tanaka、Michael R. Mannion

  DOI：10.1021/ja027523m

  日期：2002.9.1

  The development of a palladium-catalyzed decarboxylative coupling reaction of arene carboxylates with olefinic substrates is described. The optimized procedure for decarboxylative palladation employs Pd(O2CCF3)2 as catalyst (0.2 equiv) in the presence of Ag2CO3 (3 equiv) in the solvent 5% DMSO-DMF and proceeds at temperatures of 80-120 degrees C with a wide range of arene carboxylates and alkenes as substrates. The process is proposed to proceed by an initial Ar-SE reaction involving ipso attack of an electrophilic Pd(II) intermediate on an arene carboxylate to form an arylpalladium(II) species with loss of carbon dioxide. This intermediate is then proposed to react with an olefinic substrate by steps common to the Heck coupling process. Reoxidation of the liberated Pd(0) in situ is proposed to establish the catalytic cycle.
• Heck-Type Arylation of 2-Cycloalken-1-ones with Arylpalladium Intermediates Formed by Decarboxylative Palladation and by Aryl Iodide Insertion
  作者：Daisuke Tanaka、Andrew G. Myers

  DOI：10.1021/ol0363467

  日期：2004.2.1

  A palladium-catalyzed decarboxylative arylation reaction was shown to produce Heck-type coupling products using a number of different arene carboxylic acid and 2-cycloalken-1-one substrates. The more conventional Heck coupling of an aryl iodide and a 2-cycloalken-1-one reactant was also briefly explored for comparison, where it was found that phosphine-free (Jeffery) conditions afforded the highest yield of product.