2,6-dimethyl-4'-acetylbiphenyl

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,6-dimethyl-4'-acetylbiphenyl
• 英文别名: 1-(2',6'-dimethyl-[1,1'-biphenyl]-4-yl)ethanone；1-[4-(2,6-dimethylphenyl)phenyl]ethanone
• 化学式: C₁₆H₁₆O
• 分子量: 224.302
• InChiKey: MSGZXJLWMJZLLG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  苯胺 、 2,6-dimethyl-4'-acetylbiphenyl 在 对甲苯磺酸 作用下， 以 甲苯 为溶剂， 以66 %的产率得到(E)-(2',6'-dimethyl-[1,1'-biphenyl]-4-yl)-N-phenylethan-1-imine
  参考文献：
  名称：

  Cyclometallated Imides as Templates for the H‐Bond Directed Iridium‐Catalyzed Asymmetric Hydrogenation of N‐Methyl, N‐Alkyl and N‐Aryl Imines

  摘要：

  A combined computational and experimental approach allowed us to develop the most selective catalysts for the direct hydrogenation of N‐methyl and N‐alkyl imines described to date. Iridium catalysts with a cyclometallated cyclic imide group provide selectivity of up to 99% enantiomeric excess. Computational studies show that the selectivity results from the combined effect of H‐bonding of the imide C=O with the substrate iminium ion and a stabilizing π‐π interaction with the cyclometallated ligand. The cyclometallated ligand thus exhibits a unique mode of action, serving as a template for the H‐bond directed approach of the substrate which results in enhanced selectivity. The catalyst (2) has been synthesized and isolated as a crystalline air‐stable solid. X‐ray analysis of 2 confirmed the structure of the catalyst and the correct position of the imide C=O groups to engage in an H‐bond with the substrate. 19F‐NMR real‐time monitoring showed the hydrogenation of N‐methyl imines catalyzed by 2 is very fast, with a TOF of approx. 3500 h‐1.

  DOI：

  10.1002/anie.202404955
• 作为产物：
  描述：

  在 palladium diacetate 、 2,2'-双(二苯基磷)联苯 、 copper(l) chloride 、 potassium hydroxide 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 18.0h， 生成 2,6-dimethyl-4'-acetylbiphenyl
  参考文献：
  名称：

  使用芳基三硼酸盐合成四邻位取代的联芳基化合物

  摘要：

  四邻位取代的联芳基化合物是通过 2,6-二取代溴芳烃和在邻位碳上具有取代基的芳基三硼酸酯之间的交叉偶联合成的。发现使用铜 (I) 卤化物如 CuCl (20 mol%) 和钯催化剂非常有效地以良好的产率得到这种位阻联芳基化合物。过渡金属催化的交叉偶联反应是形成 C-C 键的有效合成方法。1 芳基金属化合物与芳基亲电试剂之间的交叉偶联反应是用于合成联芳基的传统 Ullman 偶联的最新变体。尽管使用各种有机金属试剂和亲电子试剂对该协议进行了广泛研究，1 最近人们对非金属硼化合物的使用产生了兴趣，因为它们在空气和水中的稳定性高，并且与广泛的官能团相容。四邻位取代的联芳基是有机功能材料 2 和许多生物活性化合物（如米歇尔胺和 steganone）的重要片段。3 最近的进展是使用富电子和空间要求高的配体，如三叔丁基膦、4 二烷基芳基膦、5-9 N-杂环卡宾、10-12 和其他配体、13-14 用于

  DOI：

  10.1055/s-0030-1260932

文献信息

• The Rational Design and Synthesis of Water-Soluble Thiourea Ligands for Recoverable Pd-Catalyzed Aerobic Aqueous Suzuki–Miyaura Reactions at Room Temperature
  作者：Wei Chen、Xiao-Yan Lu、Bei-Hua Xu、Wei-guo Yu、Zi-niu Zhou、Ying Hu

  DOI：10.1055/s-0036-1589150

  日期：2018.4

  black precipitate reveal that Pd nanoparticles are formed during the reactions and are stabilized by the carboxylic-functionalized thiourea ligands. Eight precatalysts containing carboxylic-functionalized thiourea ligands are prepared and their activities and recyclability are evaluated in aerobic aqueous Suzuki–Miyaura reactions. A bulky monothiourea–Pd complex, functionalized with four carboxylic groups

  摘要 制备了八种含有羧基官能化硫脲配体的预催化剂，并在有氧的Suzuki-Miyaura水溶液反应中评估了它们的活性和可回收性。具有四个羧基官能团的庞大的单硫脲-Pd复合物在芳基溴化物与芳基硼酸的偶联反应中显示出最佳的活性和可回收性。该催化剂可以重复使用至少五次，而其催化活性没有任何显着降低。TEM分析和所观察到的黑色沉淀物的确证催化活性表明，Pd纳米颗粒在反应过程中形成，并被羧基官能化的硫脲配体稳定。 制备了八种含有羧基官能化硫脲配体的预催化剂，并在有氧的Suzuki-Miyaura水溶液反应中评估了它们的活性和可回收性。具有四个羧基官能团的庞大的单硫脲-Pd复合物在芳基溴化物与芳基硼酸的偶联反应中显示出最佳的活性和可回收性。该催化剂可以重复使用至少五次，而其催化活性没有任何显着降低。TEM分析和所观察到的黑色沉淀物的确证催化活性表明，Pd纳米颗粒在反应过程中形成，并被羧基官能化的硫脲配体稳定。
• Palladium Catalysed Cross-Coupling of Aryl Bromides with Functionalised Arylboronic Acids in the Presence of a Tetraphosphine Ligand
  作者：Henri Doucet、Maurice Santelli、Marie Feuerstein、Florian Berthiol

  DOI：10.1055/s-2002-34896

  日期：——

  cyclopentane/[PdCl(C3H5)]2 system catalyses efficiently the cross-coupling of aryl bromides with functionalised arylboronic acids. The electronic properties of the arylboronic acids seem to have a minor influence on the reaction rate. Better results were generally obtained for the reaction of electron poor aryl bromides associated with electron rich arylboronic acids rather than the contrary.

  Cis,cis,cis-1,2,3,4-四(二苯基膦甲基)-环戊烷/[PdCl(C3H5)]2系统有效地催化芳基溴化物与官能化芳基硼酸的交叉偶联。芳基硼酸的电子特性似乎对反应速率的影响很小。与富电子芳基硼酸相关的缺电子芳基溴化物的反应通常获得更好的结果，而不是相反。
• Highly Active Palladium Catalysts for Suzuki Coupling Reactions
  作者：John P. Wolfe、Robert A. Singer、Bryant H. Yang、Stephen L. Buchwald

  DOI：10.1021/ja992130h

  日期：1999.10.1

  room-temperature Suzuki coupling of aryl bromides and aryl chlorides with 0.5−1.0 mol % Pd. Use of o-(dicyclohexylphosphino)biphenyl (2) allows Suzuki couplings to be carried out at low catalyst loadings (0.000001−0.02 mol % Pd). The process tolerates a broad range of functional groups and substrate combinations including the use of sterically hindered substrates. This is the most active catalyst system in

  乙酸钯和邻（二叔丁基膦）联苯 (4) 的混合物催化芳基溴和芳基氯与 0.5-1.0 mol% Pd 的室温 Suzuki 偶联。使用邻（二环己基膦基）联苯 (2) 允许在低催化剂负载（0.000001-0.02 mol% Pd）下进行 Suzuki 偶联。该工艺可以容忍广泛的官能团和底物组合，包括使用空间位阻底物。这是迄今为止已报道的在反应温度、转换数和空间耐受性方面最活跃的催化剂体系。
• Application of a zwitterionic palladium complex as a metal precursor of recyclable palladium nanoparticles for catalyzing Suzuki-Miyaura coupling reactions
  作者：Jhen-Yi Lee、Ru-Jiun Tzeng、Mu-Cheng Wang、Hon Man Lee

  DOI：10.1016/j.ica.2017.04.046

  日期：2017.8

  for Suzuki-Miyaura coupling reactions in water was developed based on a zwitterionic palladium complex bearing an imidazolium-based carbon donor and tricyclohexylphopshine. The complex served as an effective metal precursor for the formation of catalytically active palladium nanoparticles. The addition of excess n-tetrabutylammonium bromide (TBAB) was essential for stabilizing the nanoparticles in water

  摘要：基于带有咪唑基碳供体和三环己基磷酸的两性离子钯配合物，开发了一种有效的可循环水中铃木-宫浦偶联反应的催化剂体系。该络合物用作形成催化活性钯纳米颗粒的有效金属前体。添加过量的正四丁基溴化铵（TBAB）对于稳定水中的纳米颗粒至关重要。在几次催化运行之后，观察到相分离，并且TBAB变成离子液相，支撑钯纳米颗粒。纳米颗粒是可回收的，可以完成多达九次连续的催化运行，而不会显着降低活性。可循环使用的催化剂体系允许使用未反应的芳基氯化物作为底物，
• Ionic Liquid-Based Microemulsions in Catalysis
  作者：Mahtab Hejazifar、Martyn Earle、Kenneth R. Seddon、Stefan Weber、Ronald Zirbs、Katharina Bica

  DOI：10.1021/acs.joc.6b02165

  日期：2016.12.16

  The design and properties of surface-active ionic liquids that are able to form stable microemulsions with heptane and water are presented, and their promise as reaction media for thermomorphic palladium-catalyzed cross-coupling reactions is demonstrated.

  介绍了能够与庚烷和水形成稳定微乳液的表面活性离子液体的设计和性质，并证明了它们作为热定形钯催化交叉偶联反应的反应介质的前景。