4,4''-dimethoxy-1,1':3',1''-terphenyl | 1568-74-7

• 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: 4,4''-dimethoxy-1,1':3',1''-terphenyl
• 英文别名: 1,3-bis(4-methoxyphenyl)benzene；1,3-di(4-methoxyphenyl)benzene
• CAS: 1568-74-7
• 化学式: C₂₀H₁₈O₂
• 分子量: 290.362
• InChiKey: CNIVKSMELXXQAZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.1
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4,4''-dimethoxy-1,1':3',1''-terphenyl 在 4-二甲氨基吡啶 、 三溴化硼 作用下， 以 二氯甲烷 、 苯 为溶剂， 生成 [4-[4-[3-[4-[4-(4-Tetradecoxybenzoyl)oxybenzoyl]oxyphenyl]phenyl]phenoxy]carbonylphenyl] 4-tetradecoxybenzoate
  参考文献：
  名称：

  Molecular Design of Nonchiral Bent-Core Liquid Crystals with Antiferroelectric Properties

  摘要：

  Novel bent-core (banana-shaped) liquid crystals without Schiff-base units have been synthesized and investigated by polarized light optical microscopy, differential scanning calorimetry, X-ray scattering, and electrooptical investigations. These molecules are 4-(4-alkylbenzoyloxy)benzoates and 4-(4-alkoxybenzoyloxy)benzoates of resorcinol, 3,4'-dihydroxybiphenyl, and 4,4"-dihydroxy-1,1':3',1"-terphenyl. Three different mesophases were found depending on the molecular structure and the length of the terminal alkyl chains: a rectangular columnar phase, a highly ordered low-temperature mesophase, and an antiferroelectric switchable fluid smectic mesophase designated as SmCPA. The influence of the molecular structure on the occurrence of the SmCPA phase was investigated. The spontaneous polarization of these molecules is quite high (P-S = 500-700 nC cm(-2)) and specially those molecules with long alkyl chains and short bent-core structures have low melting points and broad regions of this switchable mesophase. Furthermore, first examples of antiferroelectric switchable bent-core molecules with semifluorinated terminal chains will be described.

  DOI：

  10.1021/ja993572w
• 作为产物：
  描述：

  (1R)-trans-1,2-dichloro-cyclohexane 在 palladium on activated charcoal 、 三氯化铝 作用下， 生成 4,4''-dimethoxy-1,1':3',1''-terphenyl
  参考文献：
  名称：

  The Pinacols and Pinacolone from p-Methoxyacetophenone

  摘要：

  DOI：

  10.1021/ja01232a039

文献信息

• Efficient construction of C–C bonds from aryl halides/aryl esters with arylboronic acids catalysed by palladium(II) thiourea complexes
  作者：Manikandan Thimma Sambamoorthy、Ramesh Rengan、Malecki Jan Grzegorz

  DOI：10.1002/aoc.5181

  日期：2019.11

  Interestingly, the palladium(II) thiourea complexes showed the highest catalytic activity with 0.1 mol% catalyst loading in Suzuki–Miyaura cross‐coupling reactions utilizing a range of aryl bromides/unactivated aryl chlorides with arylboronic acids as coupling partners in aqueous–organic media. Syntheses of diaryl ketones using aryl esters and arylboronic acids as coupling partners were also achieved with low

  已成功地合成了一组新的包含苯基（噻唑基）硫脲配体的钯（II）配合物，并借助分析和光谱（IR，UV-可见光和NMR）方法对其进行了表征。单晶X射线衍射法证实了新钯配合物中硫脲配体的N ^ S配位模式具有N ^ S配位模式的扭曲方平面几何结构。有趣的是，钯（II）硫脲配合物在铃木-宫浦交叉偶联反应中显示出最高的催化活性，催化剂负载量为0.1摩尔％，利用一系列芳基溴化物/未活化的芳基氯化物与芳基硼酸作为水性有机介质中的偶合伙伴。使用芳基酯和芳基硼酸作为偶合伙伴合成二芳基酮也可以在20小时内以较低的催化剂负载量实现。我们的催化剂的潜力通过其广泛的底物范围，低的催化剂负载量和高的分离产率得到了证明。此外，还研究了关键参数如溶剂，碱，温度和催化剂用量的影响。
• Palladium (II)–Salan Complexes as Catalysts for Suzuki–Miyaura C–C Cross-Coupling in Water and Air. Effect of the Various Bridging Units within the Diamine Moieties on the Catalytic Performance
  作者：Szilvia Bunda、Krisztina Voronova、Ágnes Kathó、Antal Udvardy、Ferenc Joó

  DOI：10.3390/molecules25173993

  日期：——

  salan ligands were synthesized by hydrogenation and subsequent sulfonation of salens (N,N’-bis(slicylidene)ethylenediamine and analogues) with various bridging units (linkers) connecting the nitrogen atoms. Pd (II) complexes were obtained in reactions of sulfosalans and [PdCl4]2−. Characterization of the ligands and complexes included extensive X-ray diffraction studies, too. The Pd (II) complexes proved

  水溶性的 salan 配体是通过对具有连接氮原子的各种桥接单元（接头）的 salens（N，N'-双（亚硅基）乙二胺和类似物）进行氢化和随后的磺化来合成的。Pd (II) 配合物是在硫柳胺和 [PdCl4]2- 的反应中获得的。配体和配合物的表征也包括广泛的 X 射线衍射研究。Pd (II) 配合物被证明是芳基卤化物和芳基硼​​酸衍生物在 80°C 下在水和空气中的 Suzuki-Miyaura 反应的高活性催化剂。对 Pd (II)-磺胺嘧啶催化剂的比较研究表明，催化活性随着接头长度的增加和配体 N 供体原子周围空间拥挤度的增加而大大增加；最高比活为40,000（mol底物）（mol催化剂×h）-1。
• Polymerizable compound and liquid crystal composition including it
  申请人：Ito Maiko

  公开号：US08394468B2

  公开（公告）日：2013-03-12

  Provided is a polymerizable compound with large solubility in a liquid crystal composition and high reactivity irradiated by ultraviolet in the longer wavelength range. Provided is a liquid crystal composition that satisfies at least one of characteristics such as high maximum temperature of a nematic phase, low minimum temperature of a nematic phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and high stability to heat, or that is suitably balanced between at least two of the characteristics. Provided is the polymerizable compound wherein at least one of a 1,3-phenylene structure and a 2,7-fluorenediyl structure is introduced to the polymerizable compound to give stable displays by forming a polymer with a high degree of polymerization in a PSA device production process using longer wavelengths, the liquid crystal composition includes the compound, and the liquid crystal display device contains the composition.

  提供了一种具有较大溶解度的聚合物化合物，其在液晶组合物中具有高反应性，可被紫外线在较长波长范围内辐照。提供了一种液晶组合物，满足至少以下特征之一：向列相的最高温度高，向列相的最低温度低，粘度小，适当的光学各向异性，较大的负介电各向异性，较大的特定电阻，对紫外光的高稳定性和对热的高稳定性，或在至少两种特征之间适当平衡。提供了一种聚合物化合物，其中至少引入了1,3-苯基结构和2,7-芴二基结构之一到聚合物化合物中，通过在使用较长波长的PSA设备生产过程中形成具有高聚合度的聚合物，从而提供稳定的显示，液晶组合物包括该化合物，液晶显示装置包含该组合物。
• Synthesis, structure and catalytic applications of octahedral nickel(II) benzoylhydrazone complex: Suzuki–Miyaura cross-coupling reaction of aryl bromides with arylboronic acid
  作者：Pandimuni Kalpaga Suganthy、Rupesh Narayana Prabhu、Venugopal Shanmugham Sridevi

  DOI：10.1016/j.ica.2016.05.015

  日期：2016.8

  Abstract A simple route for the synthesis of a new octahedral nickel(II) complex (1) containing 4-chloro-benzoic acid pyridin-2-ylmethylene-hydrazide ligand (HL, where H represents the dissociable proton) has been described. The characterization of the complex having the formula [Ni(μ3-O,N,N-L)2] has been established by elemental analysis, ESI-MS, spectral methods and single crystal X-ray crystallography

  摘要描述了一种简单的合成新的八面体镍（II）配合物的方法，该配合物包含4-氯-苯甲酸吡啶-2-基亚甲基-酰肼配体（HL，其中H表示可解离的质子）。已通过元素分析，ESI-MS，光谱方法和单晶X射线晶体学建立了具有式[Ni（μ3-O，N，NL）2]的配合物的表征。此外，在溶剂，碱和催化剂负载的优化条件下，发现新的络合物可作为取代的芳基溴化物（单溴化物和二溴化物）与各种具有不同电子效应的芳基硼酸的Suzuki-Miyaura反应的活性均相催化剂。联苯和三苯衍生物的分离产率中等至优异。
• Suzuki-Miyaura reactions promoted by a PdCl₂ /sulfonate-tagged phenanthroline precatalyst in water
  作者：Qi Li、Li-Ming Zhang、Jia-Jing Bao、Hong-Xi Li、Jing-Bo Xie、Jian-Ping Lang

  DOI：10.1002/aoc.3227

  日期：2014.12

  This work reports Suzuki–Miyaura cross‐coupling reactions of arylboronic acid with aryl halide or aryl dibromide mediated by PdCl2 (0.05 mol%) and sodium 4‐(1H‐imidazo[4,5‐f][1,10]phenanthrolin‐1‐yl)butane‐1‐sulfonate (0.05 mol%) at 100 °C in water. The corresponding cross‐coupling products were obtained in good to excellent yields. The catalytic system was recovered from the organic products by extraction

  这项工作报告了PdCl 2（0.05 mol％）和4-（1H-咪唑并[4,5-f] [1,10]菲咯啉- 1-基）丁烷-1-磺酸盐（0.05 mol％）在100°C的水中。获得了相应的交叉耦合产品，收率良好。通过用醚萃取从有机产物中回收催化体系，并且在重复使用至少四个循环后，残留的含水催化剂相显示出高活性。版权所有©2014 John Wiley＆Sons，Ltd.