(2,3-二氟-4-庚基苯基)硼酸 | 126334-37-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: (2,3-二氟-4-庚基苯基)硼酸
• 英文名称: 2,3-difluoro-4-heptylphenylboronic acid
• 英文别名: 2,3-diflouro-4-nanoylphenyl boronic acid；4-n-Heptyl-2,3-difluorophenyl boronic acid；4-heptyl-2,3-difluorophenylboronic acid；(2,3-Difluoro-4-heptylphenyl)boronic acid
• CAS: 126334-37-0
• 化学式: C₁₃H₁₉BF₂O₂
• 分子量: 256.1
• InChiKey: WVEIGGAYFCCBSA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.16
• 重原子数：
  18
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (2,3-二氟-4-庚基苯基)硼酸 在 potassium phosphate 、 四(三苯基膦)钯 、 sodium carbonate 作用下， 以 乙二醇二甲醚 、 N,N-二甲基甲酰胺 为溶剂， 反应 16.0h， 生成 2,2',3-trifluoro-4-heptyl-4"-pentylterphenyl
  参考文献：
  名称：

  Glendenning, Margaret E.; Goodby, John W.; Hird, Michael, Journal of the Chemical Society. Perkin Transactions 2 (2001), 2000, # 1, p. 27 - 34

  摘要：

  DOI：
• 作为产物：
  描述：

  1,2-二氟苯 在 palladium on activated charcoal 盐酸 、 正丁基锂 、 氢气 、 phosphorus pentoxide 作用下， 以 四氢呋喃 、 正己烷 、 Petroleum ether 为溶剂， 反应 18.5h， 生成 (2,3-二氟-4-庚基苯基)硼酸
  参考文献：
  名称：

  The synthesis and electro-optic properties of liquid crystalline 2-(2,3-difluorobiphenyl-4′-yl)-1,3-dioxanes

  摘要：

  制备了 56 种新型烷基和/或烷氧基二取代的 2-(2,3-二氟联苯-4´-基)-1,3-二氧六环 (DFBPD)。大多数烷基-烷氧基同系物展现出近晶 C 和向列相中間相。相反，多数二烷基化合物展现出近晶 C、近晶 A 和向列相。测定了两个由二氧六环体系构成的铁电混合物的双折射 (Δn)、介电各向异性 (Δε)、自发极化和响应时间。双折射结果与基于不同核心体系的 8 组混合物进行了比较。发现 DFBPD 的整体电光性质与最常用的 8 种铁电显示器材料相当。

  DOI：

  10.1039/a902351h

文献信息

• The effect of carborane, bicyclo[2.2.2]octane and benzene on mesogenic and dielectric properties of laterally fluorinated three-ring mesogens
  作者：Adam Januszko、Kristin L. Glab、Piotr Kaszynski、Kaushik Patel、Robert A. Lewis、Georg H. Mehl、Michael D. Wand

  DOI：10.1039/b600068a

  日期：——

  Six series of structurally similar compounds containing 12- and 10-vertex p-carborane (A and B), bicyclo[2.2.2]octane (C), and benzene (D) were prepared and their mesogenic and dielectric properties investigated. Comparative analysis showed that all carborane derivatives form significantly less stable mesophases than their carbocyclic analogs, however they exhibit a relatively high shielding ability for lateral fluorination. Depression of the clearing temperature upon fluorination of series 1, 3, and 5 is approximately constant for each series A–D and correlates with the diameter of the ring (the slope = 14.8 °C Å−1 and R2 = 0.997). Compounds in series 2 (X = F) were used as low concentration additives to a nematic host, 6-CHBT. Dielectric parameters were extrapolated to pure additives and analyzed using the Maier–Meier equation. The Kirkwood factors g and apparent order parameters Sapp that are required to reproduce the extrapolated dielectric values follow the trend in the size of ring . The smallest g (0.47) and the largest Sapp (6.3) are obtained for carborane 2A, and the largest g (0.69) and the smallest Sapp (0.7) are obtained for the terphenyl derivative 2D. The increase of Sapp in the series D→A corresponds to the increasing disorder of the nematic solution with increasing size of ring .

  合成了六系列结构相似的化合物，包含有12和10顶点p-碳硼烷（A和B）、双环[2.2.2]辛烷（C）以及苯（D），并研究了它们的液晶性和介电性质。比较分析表明，所有碳硼烷衍生物的液晶相稳定性都明显低于其碳环类似物，但它们展示出较高的侧向氟化屏蔽能力。系列1、3和5的熔点降低值在氟化后大致恒定，对于A至D系列的每个系列，且与环的直径相关（斜率 = 14.8 °C Å−1，R² = 0.997）。系列2中的化合物（X = F）被用作向列相主体6-CHBT中的低浓度添加剂。介电参数被外推到纯添加剂并使用Maier–Meier方程进行分析。复现外推介电值所需的Kirkwood因子g和表观有序参数Sapp遵循环大小的趋势。最小的g（0.47）和最大的Sapp（6.3）获得于碳硼烷2A，最大的g（0.69）和最小的Sapp（0.7）则获得于三联苯衍生物2D。在系列D→A中Sapp的增加对应于随着环尺寸增加而增加的向列相溶液的无序。
• Palladium-catalyzed Suzuki cross-coupling reactions in a microemulsion
  作者：Valery Vashchenko、Alexander Krivoshey、Irina Knyazeva、Alexey Petrenko、John W. Goodby

  DOI：10.1016/j.tetlet.2008.01.013

  日期：2008.2

  An enhancement of palladium-catalyzed Suzuki cross-coupling reactions between substrates possessing long-chain alkyl or oxyalkyl substituents in two-phase media, in the presence of sodium dodecylsulfate, is shown. Quantitative evaluations of the influence of SDS on the reaction rates were determined.

  显示了在十二烷基硫酸钠的存在下，在两相介质中具有长链烷基或氧基烷基取代基的底物之间钯催化的Suzuki交叉偶联反应的增强。确定了SDS对反应速率的影响的定量评估。
• Fluorinated polycycles and their use in liquid-crystal mixtures
  申请人：Wingen Rainer

  公开号：US20050098762A1

  公开（公告）日：2005-05-12

  Compounds of the formula (I) where: R 1 , R 2 are each independently a) H b) -M 1 -A 1 -R 5 c) a straight-chain or branched alkyl radical having from 1 to 16 carbon atoms or astraight-chain or branched alkenyl radical having from 2 to 16 carbon atoms, where c1) one or more nonadjacent and nonterminal CH 2 groups may be replaced by —O—, —C(═O)O—, —O—C(═O)—, —O—C(═O)—O—, —C(═O)— or —Si(CH 3 ) 2 —, and/or c2) one CH 2 group may be replaced by —C≡C—, cyclopropane-1,2-diyl, cyclobutane-1,3-diyl, cyclohexane-1,4-diyl or phenylene-1,4-diyl, and/or c3) one or more hydrogen atoms may be replaced by F and/or Cl, p, q, r are each independently 0 or 1 M 1 —is —CO—O—, —O—CO—, —CH 2 —O—, —O—CH 2 —, —CF 2 —O—, —O—CF 2 —, —CH═CH—, —CF═CF—, —C≡C—, —CH 2 —CH 2 —CO—O—, —O—CO—CH 2 —CH 2 —, —CH 2 —CH 2 —, —CF 2 —CF 2 —, —(CH 2 ) 4 —, —OC(═O)CF═CF— or a single bond, A 1 is 1,4-phenylene where one or two hydrogen atoms may be replaced by F, Cl, CN and/or OCF 3 , or up to three hydrogen atoms may be replaced by fluorine, 1,4-cyclohexylene where one or two hydrogen atoms may be replaced by CH 3 and/or F, 1-cyclohexene-1,4-diyl where one hydrogen atom may be replaced by CH 3 or F, or 1,3-dioxane-2,5-diyl, R 5 has the same possible definitions as R and R with the exception of -M 1 -A 1 -R 5 , with the provisos that: a) at least one of p, q, r is 1 b) R 1 and R 2 must not at the same time be H are used in liquid-crystal mixtures.

  化合物的结构式（I）如下：其中：R1，R2分别独立地为a）Hb）-M1-A1-R5c）具有1至16个碳原子的直链或支链烷基基团或具有2至16个碳原子的直链或支链烯基基团，其中c1）一个或多个非相邻且非末端的CH2基团可以被替换为—O—，—C(═O)O—，—O—C(═O)—，—O—C(═O)—O—，—C(═O)—或—Si(CH3)2—，和/或c2）一个CH2基团可以被—C≡C—，环丙烷-1,2-二基，环丁烷-1,3-二基，环己烷-1,4-二基或苯基-1,4-二基替换，和/或c3）一个或多个氢原子可以被F和/或Cl替换，p，q，r分别独立地为0或1M1为—CO—O—，—O—CO—，—CH2—O—，—O—CH2—，—CF2—O—，—O—CF2—，—CH═CH—，—CF═CF—，—C≡C—，—CH2—CH2—CO—O—，—O—CO—CH2—CH2—，—CH2—CH2—，—CF2—CF2—，—(CH2)4—，—OC(═O)CF═CF—或单键，A1为1,4-苯基，其中一个或两个氢原子可以被F，Cl，CN和/或OCF3替换，或最多三个氢原子可以被氟替换，1,4-环己基，其中一个或两个氢原子可以被CH3和/或F替换，1-环己烯-1,4-二基，其中一个氢原子可以被CH3或F替换，或1,3-二氧杂环戊烷-2,5-二基，R5具有与R和R相同的可能定义，但不包括-M1-A1-R5，条件是：a）p，q，r中至少有一个为1b）R1和R2不能同时为H，用于液晶混合物。
• Dioxane derivatives
  申请人：Central Research Laboratories Limited

  公开号：US05683623A1

  公开（公告）日：1997-11-04

  Dioxane derivatives for use as components in liquid crystal devices (LCDs) of general formula (A), wherein X is CH or B; R.sup.1, R.sup.2 are each A.sup.1, OA.sup.1, OCOA.sup.2, or COOA.sup.2 ; A.sup.1 is a straight or branched chain alkyl group containing from 1 to 20 carbon atoms and may be substituted with one or more F or CN. A.sup.2 is a straight or branched chain alkyl group containing from 1 to 20 carbon atoms and may be substituted with one or more F or CN and if straight may be unsubstituted. Y.sup.1, Y.sup.2, Y.sup.3 may each be (CH.sub.2).sub.p, (CH.sub.2).sub.p COO or OCO(CH.sub.2).sub.p ; p is from 0 to 10, n is 0 or 1, m is 0 or 1, either or both of Z.sub.1 and Z.sub.2 are F and, when not F, are H; Y.sup.4 is a covalent bond or, when n is 0, may be (a) LCDs, containing the devices exhibit very fast switching speed, bi-stable characteristics, enhanced greyscale and storage capabilities and a wide viewing angle.

  二氧六环衍生物可用作通式（A）中的液晶装置（LCD）组分，其中X为CH或B；R.sup.1，R.sup.2分别为A.sup.1，OA.sup.1，OCOA.sup.2或COOA.sup.2；A.sup.1为含1至20个碳原子的直链或支链烷基，并可被一个或多个F或CN取代。A.sup.2为含1至20个碳原子的直链或支链烷基，并可被一个或多个F或CN取代，如果是直链则可以未被取代。Y.sup.1，Y.sup.2，Y.sup.3可以分别为（CH.sub.2）.sub.p，（CH.sub.2）.sub.p COO或OCO（CH.sub.2）.sub.p；p为0至10，n为0或1，m为0或1，Z.sub.1和Z.sub.2中的任意一个或两个为F，当不为F时为H；Y.sup.4为共价键，或当n为0时，可以为（a）LCD，包含这些装置的液晶显示器具有非常快的开关速度、双稳态特性、增强的灰度和存储能力以及广阔的视角。
• Cyanoalkyl difluoro-terphenyl-carboxylate chiral dopants
  作者：Zohra N. Kayani、Robert A. Lewis、Shahzad Naseem

  DOI：10.1016/j.molliq.2012.03.018

  日期：2012.6

  A liquid crystal like difluoroterphenyl chiral dopant was synthesized to match the dimensions of a host chiral dopant mixture. The melting point of the chiral dopants was decreased by increasing the length of the alkyl chain. The melting point of the chiral dopants also decreased when fluorine was on the same ring as the ester i.e. at 2 '', 3 '' position. These dopants were formulated with terphenyl host mixture and liquid crystal properties were assessed. New dopants, when added to the host mixture, maintain SmA(1) but the SmC2 phase was reduced markedly. There was a decrease in spontaneous polarisation when fluorine was on the same ring as the ester i.e. at 2 '', 3 '' position. As the molecular weight of the chiral dopant increased (pentyl -> heptyl -> nonyl), spontaneous polarisation decreased. (C) 2012 Elsevier B.V. All rights reserved.