1,2-difluoro-3-(4-methylphenyl)benzene

• 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: 1,2-difluoro-3-(4-methylphenyl)benzene
• 英文别名: 2,3-difluoro-4'-methyl-biphenyl；2,3-difluoro-4’-methyl-1,1’-biphenyl；2,3-difluoro-4’-methylbiphenyl；2',3'-difluoro-4-methyl-1,1'-biphenyl；3-(4-Methylphenyl)-1,2-difluorobenzene；2,3-Difluoro-4'-methyl-1,1'-biphenyl
• 化学式: C₁₃H₁₀F₂
• 分子量: 204.219
• InChiKey: JKKQXZVLZKWDLB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  15
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.08
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1,2-difluoro-3-(4-methylphenyl)benzene 在 N-溴代丁二酰亚胺(NBS) 作用下， 以 四氯化碳 为溶剂， 反应 20.0h， 生成 1-[4-(Bromomethyl)phenyl]-2,3-difluorobenzene
  参考文献：
  名称：

  Fluorinated Benzyloxyphenyl Piperidine-4-carboxamides with Dual Function against Thrombosis: Inhibitors of Factor Xa and Platelet Aggregation

  摘要：

  A series of benzyloxy anilides of nipecotic (5, 6) and isonipecotic (7, 8) acids were synthesized and assayed in vitro as inhibitors of ADP-induced platelet aggregation and the blood coagulation enzymes factor Xa (FXa) and thrombin (FIIa). An exploration of effects of the amidine group attached at the piperidine nitrogen,position and substitution (F, phenyl) of the benzyloxy group, and addition of fluorine/s on the second (distal) phenyl ring, led us to single out some promising isonipecotamide derivatives 7. Addition of meta-F and para-CF3 on the distal phenyl ring resulted in a 6-to-18-fold enhancement of the FXa potency and in 2-to-4-fold increase of the antiplatelet potency, the last depending to a large extent upon lipophilicity. Two congeners of N-{[3-(1,1'-biphenyl-4-yl)methoxy]phenyl}piperidine-4-carboxamide (7m and 7p) proved to be potent FXa-selective inhibitors (K-i = 130 and 57 nM, respectively) and antiplatelet agents and were identified as leads for developing new dual function antithrombotic drugs.

  DOI：

  10.1021/jm801141f
• 作为产物：
  描述：

  2,3-二氟苯酚 在 iron(III) fluoride trihydrate 、 sodium hydride 、 1,3-双(2,6-二异丙基苯基)氯化咪唑鎓 作用下， 以 四氢呋喃 、 乙二醇二甲醚 、 mineral oil 为溶剂， 反应 24.25h， 生成 1,2-difluoro-3-(4-methylphenyl)benzene
  参考文献：
  名称：

  Iron-Catalyzed Coupling of Aryl Sulfamates and Aryl/Vinyl Tosylates with Aryl Grignards

  摘要：

  The iron-catalyzed coupling of aryl sulfamates and tosylates with aryl Grignard reagents is reported for the first time. The methodology employs air-stable, low-cost FeF3 center dot 3H(2)O and the N-heterocyclic carbene ligand IPr center dot HCl as the preligand to form a long-lived catalyst upon treatment with aryl Grignards. The reaction provides a range of cross-coupled products in good-to-excellent yields. In contrast to previous reports with aryl chlorides, these reactions proceed with low levels of Grignard homocoupling regardless of the iron source.

  DOI：

  10.1021/ol5024344

文献信息

• Green synthesis of fluorinated biaryl derivatives via thermoregulated ligand/palladium-catalyzed Suzuki reaction
  作者：Ning Liu、Chun Liu、Zilin Jin

  DOI：10.1016/j.jorganchem.2011.04.007

  日期：2011.7

  and material science due to their unique physical properties. This paper reports an efficient and environmentally benign protocol for the Suzuki reaction of aryl halides with fluorinated arylboronic acids over a thermoregulated ligand/palladium catalyst using water as sole medium, affording a variety of fluorinated biaryls, including fluorinated liquid crystals, in excellent yields. The catalyst could

  氟化物因其独特的物理性能而在制药，农用化学品和材料科学领域引起了相当大的关注。本文报道了在水为唯一介质的热调节配体/钯催化剂上，芳基卤化物与氟化芳基硼酸的Suzuki反应的有效和环境友好的方案，以优异的收率提供了多种氟化联芳基，包括氟化液晶。该催化剂可以高活性回收四次。通过汞中毒试验证明活性催化剂是钯/配体络合物。
• Cyclohexene derivative having alkenyl, liquid crystal composition and liquid crystal display device
  申请人：Shimada Teru

  公开号：US20080063814A1

  公开（公告）日：2008-03-13

  A liquid crystal compound selected from a group of compounds represented by formula (a): wherein Ra and Rb are each independently hydrogen, alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, provided that in the alkyl, —CH 2 — may be replaced by —O—, but plural —O— are not adjacent to each other, and hydrogen may be replaced by fluorine; ring A 1 and ring A 2 are each independently trans-1,4-cyclohexylene or 1,4-phenylene, provided that one or two hydrogens of the 1,4-phenylene may be replaced by halogen, and in a 6-membered ring of these groups, one —CH 2 — or two —CH 2 — that are not adjacent to each other may be replaced by —O—, and one or two —CH═ may be replaced by —N═; Z 1 and Z 2 are each independently a single bond, —(CH 2 ) 2 —, —(CH 2 ) 4 —, —CH═CH—, —C≡—, —CH 2 O—, —OCH 2 —, —COO—, —OCO— or —OCF 2 —; l and m are each independently 0, 1 or 2, provided that l+m is 0, 1, 2 or 3; and n is an integer of from 0 to 6, provided that in —(CH 2 ) n —, —CH 2 — may be replaced by —O—, but plural —O— are not adjacent to each other, and hydrogen may be replaced by fluorine.

  从由式（a）表示的化合物组中选择的液晶化合物： 其中Ra和Rb分别独立地是氢、具有1至10个碳的烷基或具有2至10个碳的烯基，前提是在烷基中，-CH2-可以被-O-替换，但多个-O-不相邻，氢可以被氟替换；环A1和环A2分别独立地是反-1,4-环己烯基或1,4-苯基，前提是1,4-苯基的一个或两个氢可以被卤素替换，在这些基团的6元环中，一个不相邻的-CH2-或两个不相邻的-CH2-可以被-O-替换，一个或两个-CH═可以被-N═替换；Z1和Z2分别独立地是单键，-(CH2)2-，-(CH2)4-，-CH═CH-，-C≡-，-CH2O-，-OCH2-，-COO-，-OCO-或-OCF2-；l和m分别独立地是0、1或2，前提是l+m为0、1、2或3；n是0至6的整数，前提是在-(CH2)n-中，-CH2-可以被-O-替换，但多个-O-不相邻，氢可以被氟替换。
• Chlorofluorobenzene liquid crystal compound, liquid crystal composition and liquid crystal display device
  申请人：Goto Yasuyuki

  公开号：US20080075891A1

  公开（公告）日：2008-03-27

  A liquid crystal compound selected from a group of compounds represented by formula (a): wherein Ra and Rb are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons; ring A 1 , ring A 2 and ring A 3 are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, 6-fluoropyridine-2,5-diyl or pyridazine-2,5-diyl; Z 1 , Z 2 and Z 3 are each independently a single bond, —(CH 2 ) 2 —, —CH═CH—, —C≡C—, —CH 2 O, —OCH 2 —, —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CH 2 CH 2 OCF 2 — or —CF 2 OCH 2 CH 2 —; l, m and n are each independently 0, 1 or 2, provided that l+m+n is 0, 1, 2 or 3; one of X 1 and X 2 is fluorine, and the other is chlorine; Q is and atoms comprising the compound each may be an isotope thereof.

  从由式（a）表示的化合物组中选择的液晶化合物： 其中Ra和Rb分别独立地是具有1至10个碳的烷基，具有1至9个碳的烷氧基，具有2至9个碳的烷氧基烷基，具有2至10个碳的烯基，具有2至9个碳的烯氧基，具有1至10个碳的氟烷基或具有1至9个碳的氟烷氧基；环A1，环A2和环A3分别独立地是反式-1,4-环己烷基，反式-1,3-二噁烷-2,5-二基，反式-四氢吡喃-2,5-二基，1,4-苯基，2-氟-1,4-苯基，2,3-二氟-1,4-苯基，2,5-二氟-1,4-苯基，2,6-二氟-1,4-苯基，吡啶-2,5-二基，6-氟吡啶-2,5-二基或吡啶并嗪-2,5-二基；Z1，Z2和Z3分别独立地是单键，—(CH2)—，—CH═CH—，—C≡C—，—CH2O，—OCH2—，—COO—，—OCO—，—OCF2—，—CF2O—，—CH2CH2OCF2—或—CF2OCH2CH2—；l，m和n分别独立地为0，1或2，前提是l+m+n为0，1，2或3；X1和X2中的一个是氟，另一个是氯；Q是 化合物中的原子均可是其同位素。
• Liquid crystal carbonate and liquid crystal medium containing the same with positive or negative dielectric anisotropy
  申请人：Dabrowski Roman Slawomir

  公开号：US20130020532A1

  公开（公告）日：2013-01-24

  A novel liquid crystalline carbonate and the mixture containing the same: wherein R3 is an alkyl (H 2n+1 C n ) or an alkenyl (H 2n−1 C n ) group, each of 1 to 12 carbon atoms, the ring A is laterally unsubstituted benzene or pyridine or pyrimidine or trans-substituted cyclohexane ring, symbol r is 0 to 2; the lateral substituents: X 2 , X 3 , X 4 and X 5 in the benzene rings represent independently hydrogen or fluorine or chlorine atoms, X 1 is hydrogen or fluorine atom and simultaneously at least one of the substituents: X 2 , X 3 and X 4 is fluorine or chlorine atoms, Y is an alkyl or an alkyloxy or an alkenyl or an aikenyloxy group, each of 1 to 12 carbon atoms or hydrogen or fluorine or chlorine atom or NCS group are described.

  一种新型液晶碳酸酯及其含有的混合物：其中R3是一个烷基（H2n+1Cn）或烯基（H2n−1Cn）基团，每个基团含有1至12个碳原子，环A是侧链未取代的苯或吡啶或嘧啶或反取代的环己烷环，符号r为0至2；苯环中的侧链取代物X2、X3、X4和X5分别代表氢或氟或氯原子，X1为氢或氟原子，同时至少有一个取代物X2、X3和X4为氟或氯原子，Y是一个烷基或烷氧基或烯基或烯氧基基团，每个基团含有1至12个碳原子或氢或氟或氯原子或NCS基团。
• Nickel- and Palladium-Catalyzed Cross-Coupling Reaction of Polyfluorinated Arenes and Alkenes with Grignard Reagents
  作者：Tomoyuki Saeki、Kohei Tamao、Yohei Takashima

  DOI：10.1055/s-2005-871571

  日期：——

  The cross-coupling reaction of fluorobenzene with an aryl Grignard reagent has been reinvestigated which revealed that the reaction readily proceeds under ordinary conditions using a catalytic amount of NiCl2(dppp) even at room temperature. The use of nickel catalysts and Grignard reagent is essential for the activation of the carbon-fluorine bond. The palladium catalyst is also effective for the 1,2-difluorobenzene and trifluorobenzenes to selectively produce the corresponding mono-coupled products while the nickel-based catalyst system affords a mixture of the mono-coupled product and di- or tri-coupled product.

  氟苯与芳基格里尼亚试剂的交叉偶联反应已被重新研究，结果表明在普通条件下，即使在室温下也能通过使用催化量的NiCl2(dppp)容易地进行反应。使用镍催化剂和格里尼亚试剂对于激活碳-氟键是至关重要的。钯催化剂对于1,2-二氟苯和三氟苯也有效，能够选择性地产生相应的单偶联产物，而基于镍的催化剂系统则会产生单偶联产物和双偶联或三偶联产物的混合物。