(E)-(1-(2-methoxyphenyl)ethene-1,2-diyl)dibenzene

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 英文名称: (E)-(1-(2-methoxyphenyl)ethene-1,2-diyl)dibenzene
• 英文别名: 1-[(E)-1,2-diphenylethenyl]-2-methoxybenzene
• 化学式: C₂₁H₁₈O
• 分子量: 286.373
• InChiKey: MVNNPKPCPGPSCO-CAPFRKAQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.05
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  2-methoxyphenyldiazonium tetrafluoroborate 、 二苯基乙炔 在 palladium diacetate 、 三苯基硅烷 作用下， 以 四氢呋喃 为溶剂， 以56%的产率得到(E)-(1-(2-methoxyphenyl)ethene-1,2-diyl)dibenzene
  参考文献：
  名称：

  Palladium-Catalyzed Hydroarylation of Alkynes with Arenediazonium Salts

  摘要：

  The palladium-catalyzed hydroarylation of arenediazonium tetrafluoroborates with alkynes in the presence of triphenylsilane affords stereoselectively hydroarylation products in moderate to high yields. The reaction tolerates a variety of substituents including keto, ester, cyano, and nitro groups and can be performed as a one-pot procedure generating the arenediazonium salt in situ. With ethyl phenylpropynoate as the starting alkyne, the hydroarylation affords ethyl (2)-2-arylcinnamates stereo- and regioselectively.

  DOI：

  10.1021/ol800266e

文献信息

• Geometry-Constrained Iminopyridyl Palladium-Catalyzed Hydroarylation of Alkynes to Prepare Tri-substituted Alkenes Using Alcohol as Reductant
  作者：Ke Wu、Nan Sun、Baoxiang Hu、Zhenlu Shen、Liqun Jin、Xinquan Hu

  DOI：10.1002/adsc.201800423

  日期：2018.8.17

  straightforward method to prepare tri‐substituted alkenes through palladium‐catalyzed hydroarylation of alkynes with aryl bromides. Diarylacetylenes and alkyl(aryl)acetylenes could be well hydroarylated with various aryl bromides in moderate to excellent yields. Mechanistic studies suggested that alcohol was the reductant to provide hydride through β‐H elimination. Gram scale reaction further demonstrated

  我们开发了一种有效且直接的方法，通过钯与芳基溴化物催化炔烃的加氢芳基化反应来制备三取代烯烃。二芳基乙炔和烷基（芳基）乙炔可以用各种芳基溴化物以中等至极好的收率很好地进行氢芳基化。机理研究表明，酒精是通过消除β-H来提供氢化物的还原剂。革兰氏反应进一步证明了新开发策略的实用性和有效性。
• Palladium-catalyzed reactions of aryl iodides with trimethylsilylacetylenes and disubstituted alkynes: the synthesis of diarylacetylenes and triarylethylenes
  作者：Ming-Jung Wu、Li-Mei Wei、Chi-Fong Lin、Shiow-Piaw Leou、Li-Lan Wei

  DOI：10.1016/s0040-4020(01)00758-x

  日期：2001.9

  trimethylsilylacetylene in the presence of 3 equiv. of sodium methoxide and 5 mol% of Pd(PPh3)4 under refluxing methanol for 6 h gave diarylacetylene in good chemical yields. When the catalyst was replaced by Pd(dba)2 and 5 equiv. of aryl iodide were added under the same reaction conditions, triarylethylenes were obtained in 70–85% yields. Only the sterically hindered o-methoxyiodobenzene and 2-iodothiophene

  2.5当量的治疗 在3当量的存在下，芳基碘化物与三甲基甲硅烷基乙炔的反应。将甲醇钠和5 mol％的Pd（PPh 3）4在甲醇回流6 h时，以良好的化学收率得到二芳基乙炔。当催化剂被Pd（dba）2和5当量代替。在相同的反应条件下加入碘化芳基碘，可得到70-85％的三芳基乙烯。仅空间受阻的邻甲氧基碘苯和2-碘噻吩给出了二芳基乙炔，但化学收率也很高。在Pd（OAc）2存在下芳基碘化物与双取代炔烃的反应甲醇中的甲醇钠生成适量的三取代乙烯。通过β-氢化物消除甲醇钯钯中间体提出了有机钯的氢解。
• Rhodium(I)-Catalyzed Carbonylative Arylation of Alkynes with Arylboronic Acids Using Formaldehyde as a Carbonyl Source
  作者：Tsumoru Morimoto、Chuang Wang、Hiroyuki Kanashiro、Hiroki Tanimoto、Yasuhiro Nishiyama、Kiyomi Kakiuchi、Levent Artok

  DOI：10.1055/s-0033-1341046

  日期：——

  The rhodium(I)-catalyzed reaction of alkynes with arylboronic acids in the presence of formaldehyde resulted in a carbon monoxide gas-free carbonylative arylation to yield α,β-enones. The simultaneous loading of phosphine-ligated and phosphine-free rhodium(I) complexes is required for efficient catalysis, which catalyze the abstraction of a carbonyl moiety from formaldehyde (decarbonylation) and its

  在甲醛存在下，炔烃与芳基硼酸的铑 (I) 催化反应导致无一氧化碳气体的羰基化芳基化反应生成 α,β-烯酮。高效催化需要同时加载连接膦和不含膦的铑 (I) 配合物，分别催化从甲醛中提取羰基部分（脱羰），然后将其引入底物（羰基化）。
• Employing Water as the Hydride Source in Synthesis: A Case Study of Diboron Mediated Alkyne Hydroarylation
  作者：Santhosh Rao、M. Nibin Joy、Kandikere Ramaiah Prabhu

  DOI：10.1021/acs.joc.8b01965

  日期：2018.11.16

  We present an approach to utilize water as the hydride source via Pd(II)/Pd(0) catalysis. As a case study, we have achieved a diboron mediated Pd(II)-catalyzed hydroarylation of alkynes using arylboronic acids. This approach not only complements conventional reactivity of Pd via Pd(0)/Pd(II) cycle for the hydroarylation but also utilizes water as the hydride source. We believe this would particularly

  我们提出一种通过Pd（II）/ Pd（0）催化利用水作为氢化物来源的方法。作为一个案例研究，我们已经实现了使用芳基硼酸的二硼介导的Pd（II）催化炔烃的氢芳基化反应。该方法不仅通过Pd（0）/ Pd（II）循环对Pd的常规反应性进行了补充，还可以利用水作为氢化物源。我们认为，这对于利用水作为试剂特别有益。
• Synthesis of Trisubstituted Alkenes via Direct Oxidative Arene–Alkene Coupling
  作者：Roderick C. Jones、Michał Gałęzowski、Donal F. O’Shea

  DOI：10.1021/jo401326f

  日期：2013.8.16

  2-disubstituted alkene oxidative couplings, providing an efficient route to trisubstituted alkenes. The acetonitrile cosolvent dramatically accelerates the rate of reaction, and an insoluble inorganic oxidant limits unwanted oxidation of substrates. The scope of this procedure is illustrated with arenes and alkenes containing electron-donating and -withdrawing substituents resulting in a general synthetic

  已确定将无机氧化剂与乙酸/乙腈溶剂组合使用是直接芳烃/ 1,2-二取代烯烃氧化偶联的最佳方法，从而提供了通往三取代烯烃的有效途径。乙腈助溶剂极大地加快了反应速度，并且不溶的无机氧化剂限制了底物的有害氧化。用含有给电子和吸电子取代基的芳烃和烯烃说明了该方法的范围，这导致了对三取代烯烃的一般合成策略。对反应成分的原位ESI-MS分析已确定了藤原-森谷催化循环中的关键Pd中间体。