4,4',5,5'-tetramethyl-2,2'-bithiophene | 30187-20-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 双噻吩和低聚噻吩
• 英文名称: 4,4',5,5'-tetramethyl-2,2'-bithiophene
• 英文别名: 4,5,4',5'-tetramethyl-[2,2']bithiophenyl；5-(4,5-dimethylthiophen-2-yl)-2,3-dimethylthiophene
• CAS: 30187-20-3
• 化学式: C₁₂H₁₄S₂
• 分子量: 222.375
• InChiKey: MARVHNRMONVFJQ-UHFFFAOYSA-N

物化性质

• 熔点：
  104-105 °C
• 沸点：
  289.8±35.0 °C(Predicted)
• 密度：
  1.118±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.5
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  56.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4,4',5,5'-tetramethyl-2,2'-bithiophene 在 1,3-二溴-5,5-二甲基海因 作用下， 以 氯仿 为溶剂， 反应 0.5h， 以86%的产率得到3-bromo-4,4',5,5'-tetramethyl-2,2'-bithiophene
  参考文献：
  名称：

  US2014/256936

  摘要：

  公开号：
• 作为产物：
  描述：

  2,3-二甲基噻吩 生成 4,4',5,5'-tetramethyl-2,2'-bithiophene
  参考文献：
  名称：

  Thallium(III) Trifluoroacetate−Trifluoroacetic Acid in the Chemistry of Polythiophenes. 2. Treatment of 3-Alkylthiophenes and Electron Paramagnetic Resonance Results

  摘要：

  The treatment of thiophene and 3-alkylthiophenes with thallium(III) trifluoroacetate (TTFA) in trifluoroacetic acid (TFA) gives insoluble and dark powdery solids with oxygen content and electrical conductivities ranging from 10(-4) to 10(-6) Omega(-1) cm(-1). Polar and short fractions are negligible. All of them show semiconductivity (10(-3)-10(-6) Omega(-1) cm(-1)) when doped in iodine atmosphere. Electron paramagnetic resonance (EPR) spectra of either as-synthesized or I-2-treated solids display characteristic single and broad lines (Delta H-pp, 1.84-7.4 G) with Lorentzian shapes and g-values in the range 2.0028-2.0038. Infrared spectra show characteristic C-H out-of-plane deformations (780 cm(-1) for polythiophene and 820-825 cm(-1) for poly(3-alkylthiophenes)) in addition to a strong peak at 1650-1690 cm(-1) which has not been conclusively assigned. EPR spectra of some disubstituted and tetrasubstituted 2,2'-bithiophene radical cations have been observed and their g-values and coupling constants assigned when the corresponding parent compounds-are photolyzed with ultraviolet light in TFA. Photolysis of 3-alkylthiophenes in TFA in the EPR instrument gave the radical cations of 4,4'-dialkyl-2,2'-bithiophenes. In no case, were EPR signals of the isomeric 3,3'-dialkyl- or 3,4'-dialkyl-2,2'-bithiophene radical cations observed, indicating that dimerization of 3-alkylthiophenes occurs through the less sterically hindered 5-position. The presence of two doublet species corresponding to both conformers, syn and anti, in the radical cations is associated with a large barrier to rotation about the C(2)-C(2') bond.

  DOI：

  10.1021/jo961065g

文献信息

• Indium-Catalyzed Annulation of 2-Aryl- and 2-Heteroarylindoles with Propargyl Ethers: Concise Synthesis and Photophysical Properties of Diverse Aryl- and Heteroaryl-Annulated[<i>a</i>]carbazoles
  作者：Teruhisa Tsuchimoto、Hiromichi Matsubayashi、Masayoshi Kaneko、Yuta Nagase、Takuhiro Miyamura、Eiji Shirakawa

  DOI：10.1021/ja803954e

  日期：2008.11.26

  is applicable also to symmetrical dimers such as bithiophene and bifuran derivatives. Mechanistic studies suggest that the first step is addition reaction initiated by regioselective nucleophilic attack of the C3 of 2-aryl- and 2-heteroarylindoles to the internal carbon atom of the C[triple bond]C bond in propargyl ethers. The next stage is ring-closing S(N)2 process kicking out the alkoxy group and

  在催化量的九氟丁烷磺酸铟 [In(ONf)(3)] 存在下，用炔丙基醚处理 2-芳基-和 2-杂芳基吲哚，以良好的产率得到芳基-和杂芳基-环化的 [a] 咔唑。合成上有吸引力的特征反映在其对广泛范围的 2-芳基-和 2-杂芳基吲哚的适用性上。在环化反应中，炔丙醚作为 C3 源（HC[三键]C-CH(2)OR）。其中，两个碳原子作为新构建的芳环的成员并入产物中，剩余的碳原子在芳环上形成甲基，其中甲基始终位于吲哚核的 C3 位置旁边。甲基可以通过 SeO(2) 氧化轻松去除，然后用 RhCl(CO)(PPh(3))(2)-Ph(2)P(CH(2))(3)PPh(2) 脱羰，如一种催化剂。新的环化策略也适用于对称二聚体，如联噻吩和双呋喃衍生物。机理研究表明，第一步是通过 2-芳基-和 2-杂芳基吲哚的 C3 与炔丙醚中 C[三键]C 键的内部碳原子的区域选择性亲核攻击引发的加成反应。下一阶段是闭环
• DIARYLETHENE COMPOUNDS AND USES THEREOF
  申请人：SWITCH MATERIALS, INC.

  公开号：US20160083398A1

  公开（公告）日：2016-03-24

  A compound according to Formula IA and IB, reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer A and a ring-closed isomer B is provided. For substitutent groups, Z is N, O or S; each R 1 is independently selected from the group consisting of H, or halo; each R 2 is independently selected from the group consisting of H, halo, a polymer backbone, alkyl or aryl; or, when both R 2 together form —CH═CH— and form part of a polymer backbone; each R 3 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl; each R 4 is aryl; and each R 5 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl.

  本发明提供了一种按照式IA和IB的化合物，在光致变色和电致变色条件下，可在环开放异构体A和环闭合异构体B之间可逆地转化。对于取代基，Z为N、O或S；每个R1独立地选自H或卤素；每个R2独立地选自H、卤素、聚合物骨架、烷基或芳基；或者，当两个R2一起形成-CH═CH-并形成聚合物骨架的一部分时；每个R3独立地选自H、卤素、烷基、烷氧基、硫代烷基或芳基；每个R4为芳基；每个R5独立地选自H、卤素、烷基、烷氧基、硫代烷基或芳基。
• Diarylethene compounds and uses thereof
  申请人：SWITCH MATERIALS, INC.

  公开号：US10072023B2

  公开（公告）日：2018-09-11

  A compound according to Formula IA and IB, reversibly convertible under photochromic and electrochromic conditions between a ring-open isomer A and a ring-closed isomer B is provided. For substitutent groups, Z is N, O or S; each R1 is independently selected from the group consisting of H, or halo; each R2 is independently selected from the group consisting of H, halo, a polymer backbone, alkyl or aryl; or, when both R2 together form —CH═CH— and form part of a polymer backbone; each R3 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl; each R4 is aryl; and each R5 is independently selected from the group consisting of H, halo, alkyl, alkoxy, thioalkyl or aryl.

  提供了一种根据式 IA 和 IB 的化合物，该化合物在光致变色和电致变色条件下可在开环异构体 A 和闭环异构体 B 之间进行可逆转换。对于取代基，Z 是 N、O 或 S；每个 R1 独立地选自 H 或卤代；每个 R2 独立地选自 H、卤代、聚合物骨架、烷基或芳基；或者，当两个 R2 一起形成 -CH═CH- 并构成聚合物骨架的一部分时；每个 R3 独立地选自由 H、卤素、烷基、烷氧基、硫代烷基或芳基组成的组；每个 R4 是芳基；每个 R5 独立地选自由 H、卤素、烷基、烷氧基、硫代烷基或芳基组成的组。
• Herrmann, Wolfgang A.; Andrejewski, Dirk, Chemische Berichte, 1986, vol. 119, # 3, p. 878 - 886
  作者：Herrmann, Wolfgang A.、Andrejewski, Dirk

  DOI：——

  日期：——
• Easy Access to Aryl- and Heteroaryl-Annulated[a]carbazoles by the Indium-Catalyzed Reaction of 2-Arylindoles with Propargyl Ethers
  作者：Teruhisa Tsuchimoto、Hiromichi Matsubayashi、Masayoshi Kaneko、Eiji Shirakawa、Yusuke Kawakami

  DOI：10.1002/anie.200462280

  日期：2005.2.18