4-methyl-2-(1H-pyrazol-1-yl) benzoic acid methyl ester | 1262659-72-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 4-methyl-2-(1H-pyrazol-1-yl) benzoic acid methyl ester
• 英文别名: methyl 4-methyl-2-(1H-pyrazol-1-yl)benzoate；Methyl 4-methyl-2-pyrazol-1-ylbenzoate；methyl 4-methyl-2-pyrazol-1-ylbenzoate
• CAS: 1262659-72-2
• 化学式: C₁₂H₁₂N₂O₂
• 分子量: 216.239
• InChiKey: SVDJTZQQXKTAFT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  44.1
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  1-(3-甲基苯基)吡唑 在 RuH₂(CO)(PPh₃)₃ 、 norbornene 、 caesium carbonate 、 cesium fluoride 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 20.0~100.0 ℃ 、101.33 kPa 条件下， 反应 36.5h， 生成 4-methyl-2-(1H-pyrazol-1-yl) benzoic acid methyl ester
  参考文献：
  名称：

  Ruthenium-Catalyzed C–H Silylation of 1-Arylpyrazole Derivatives and Fluoride-Mediated Carboxylation: Use of Two Nitrogen Atoms of the Pyrazole Group

  摘要：

  Carboxylation of 1-arylpyrazole derivatives was developed using a ruthenium-catalyzed ortho silylation in conjunction with fluoride-mediated carboxylation with carbon dioxide. The two nitrogen atoms of pyrazole play crucial roles in promoting ortho silylation via the formation of a five-membered ruthenacycle and in accelerating aryl anion formation by lowering the electron density of the aromatic ring.

  DOI：

  10.1055/s-0033-1341230

文献信息

• Rhodium(I)-Catalyzed Direct Carboxylation of Arenes with CO₂ via Chelation-Assisted C−H Bond Activation
  作者：Hajime Mizuno、Jun Takaya、Nobuharu Iwasawa

  DOI：10.1021/ja109097z

  日期：2011.2.9

  products in good yields. The catalysis is proposed to consist of methylrhodium(I) species as the key intermediate, which undergoes C-H activation to afford rhodium(III), followed by reductive elimination of methane to give nucleophilic arylrhodium(I). This approach demonstrates promising application of C-H bond activation strategy in the field of carbon dioxide fixation.

  首次通过螯合辅助的 CH 活化实现了在常压二氧化碳下 Rh 催化未活化的芳基 CH 键的直接羧化。在铑催化剂和化学计量甲基化试剂 AlMe(2)(OMe) 的存在下，各种取代和官能化的 2-芳基吡啶和 1-芳基吡唑经历了羧化反应，以良好的收率得到羧化产物。该催化剂被提议由甲基铑（I）物种作为关键中间体组成，它经过 CH 活化得到铑（III），然后还原消除甲烷得到亲核芳基铑（I）。这种方法证明了 CH 键活化策略在二氧化碳固定领域的应用前景。
• Ruthenium-Catalyzed C–H Silylation of 1-Arylpyrazole Derivatives and Fluoride-Mediated Carboxylation: Use of Two Nitrogen Atoms of the Pyrazole Group
  作者：Tsuyoshi Mita、Yoshihiro Sato、Hiroyuki Tanaka、Kenichi Michigami

  DOI：10.1055/s-0033-1341230

  日期：——

  Carboxylation of 1-arylpyrazole derivatives was developed using a ruthenium-catalyzed ortho silylation in conjunction with fluoride-mediated carboxylation with carbon dioxide. The two nitrogen atoms of pyrazole play crucial roles in promoting ortho silylation via the formation of a five-membered ruthenacycle and in accelerating aryl anion formation by lowering the electron density of the aromatic ring.