5-bromo-2-(4'-methoxyphenyl)benzoic acid

• 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: 5-bromo-2-(4'-methoxyphenyl)benzoic acid
• 英文别名: 5-Bromo-2-(4-methoxyphenyl)benzoic acid；5-bromo-2-(4-methoxyphenyl)benzoic acid
• 化学式: C₁₄H₁₁BrO₃
• 分子量: 307.144
• InChiKey: YHHTVEHOCRMEOZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-bromo-2-(4'-methoxyphenyl)benzoic acid 在 N-氯代丁二酰亚胺 、 sodium iodide 作用下， 以 1,2-二氯乙烷 为溶剂， 反应 21.0h， 以97%的产率得到3,4-(2'-bromo)benzo-7-methoxycoumarin
  参考文献：
  名称：

  Facile Preparation of 3,4-Benzocoumarins from 2-Arylbenzoic Acids with NCS and Nai

  摘要：

  Treatment of 2-arylbenzoic acids with N-chlorosuccinimide (NCS) and NaI at 70 degrees C under fluorescent lighting condition gave the corresponding 3,4-benzocoumarins in good yields under transition-metal-free condition. It was found that the reactivity of NCS with NaI for the formation of 3,4-benzocoumarins from 2-arylbenzoic acids was as high as that with NIS. Thus, the formation of carboxyl radicals and their cyclization onto an aromatic ring from 2-arylbenzoic acids with much less expensive NCS and NaI, than NIS could be successfully carried out to form 3,4-benzocoumarins.

  DOI：

  10.3987/com-20-14292
• 作为产物：
  描述：

  5-溴-2-碘苯甲酸乙酯 在 bis-triphenylphosphine-palladium(II) chloride 、 potassium carbonate 、 potassium hydroxide 作用下， 以 乙醇 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 14.0h， 生成 5-bromo-2-(4'-methoxyphenyl)benzoic acid
  参考文献：
  名称：

  Facile Preparation of 3,4-Benzocoumarins from 2-Arylbenzoic Acids with NCS and Nai

  摘要：

  Treatment of 2-arylbenzoic acids with N-chlorosuccinimide (NCS) and NaI at 70 degrees C under fluorescent lighting condition gave the corresponding 3,4-benzocoumarins in good yields under transition-metal-free condition. It was found that the reactivity of NCS with NaI for the formation of 3,4-benzocoumarins from 2-arylbenzoic acids was as high as that with NIS. Thus, the formation of carboxyl radicals and their cyclization onto an aromatic ring from 2-arylbenzoic acids with much less expensive NCS and NaI, than NIS could be successfully carried out to form 3,4-benzocoumarins.

  DOI：

  10.3987/com-20-14292

文献信息

• Iridium-Catalyzed<i>ortho</i>-Arylation of Benzoic Acids with Arenediazonium Salts
  作者：Liangbin Huang、Dagmar Hackenberger、Lukas J. Gooßen

  DOI：10.1002/anie.201505769

  日期：2015.10.19

  In the presence of catalytic [IrCp*Cl2}2] and Ag2CO3, Li2CO3 as the base, and acetone as the solvent, benzoic acids react with arenediazonium salts to give the corresponding diaryl‐2‐carboxylates under mild conditions. This CH arylation process is generally applicable to diversely substituted substrates, ranging from extremely electron‐rich to electron‐poor derivatives. The carboxylate directing

  在催化[IrCp * Cl 2 } 2 ]和Ag 2 CO 3，Li 2 CO 3为碱，丙酮为溶剂的情况下，苯甲酸与槟榔重氮盐反应生成相应的二芳基-2-羧酸盐温和的条件。这种CH芳基化过程通常适用于各种取代的底物，范围从极富电子的至贫电子的衍生物。羧酸根导向基团是广泛可得的，可以无痕地除去或用于进一步的衍生作用。通过使用重氮盐可实现与卤化物交叉偶联的正交性，即使存在碘取代基也可将其偶联。
• Dual-role catalysis of iridium in photo-irradiation synthesis of 9-fluorenone through intramolecular cyclization <i>via</i> hydrogen evolution
  作者：Xi Hong、Yi-Wen Zhang、Bing Zhan、Xue-Juan Chen、De-Jun Hu、Zhi-Ming Li、Xiu-Feng Hou

  DOI：10.1039/d3cy01353g

  日期：——

  the dehydrogenation. The catalyst [Ir(Fmpbo)2dtbppy]PF6 played a dual role as both the photoredox catalyst to initiate the benzoyl radical reaction and the TM catalyst to finish the aromatization and the hydrogen evolution. The photoredox/TM dual catalytic role of the Ir catalyst was proposed firstly. The reactions provide good to excellent yields of the products under mild and economic conditions.

  以2-芳基苯并[ d ]恶唑基铱配合物为双用途催化剂，由[1,1'-联苯]-2-羧酸光氧化还原催化合成9-芴酮。首次发现了伴随 9-芴酮形成的不寻常的析氢反应。形成的氢的量与9-芴酮成正比，这使得反应原子经济。结合DFT计算，提出了铱催化剂的配体解离过程来解释脱氢反应。催化剂[Ir(Fmpbo) 2 dtbppy]PF 6发挥双重作用，既作为引发苯甲酰自由基反应的光氧化还原催化剂，又作为完成芳构化和析氢的TM催化剂。首次提出Ir催化剂的光氧化还原/TM双重催化作用。该反应在温和且经济的条件下提供了良好至优异的产物收率。