2,4-二溴苯乙烯 | 24162-63-8

• 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: 2,4-二溴苯乙烯
• 中文别名: 二环[2.2.1]庚-5-烯-2-甲醛,7-乙酰基-,(endo,anti)-(9CI)
• 英文名称: 2,4-dibromostyrene
• 英文别名: 2,4-dibromo-1-ethenylbenzene
• CAS: 24162-63-8
• 化学式: C₈H₆Br₂
• 分子量: 261.944
• InChiKey: NTHFKMZKTASAMH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  10
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  2,4-二溴苯乙烯 、 4-甲氧基苯硼酸频那醇酯 在 potassium phosphate 、 四(三苯基膦)钯 、 水 、 potassium bromide 作用下， 以 1,4-二氧六环 为溶剂， 反应 24.0h， 以52%的产率得到3-bromo-4'-methoxy-4-vinyl-1,1'-biphenyl
  参考文献：
  名称：

  非对称二溴苯的区域选择性Suzuki偶联：烯烃作为区域化学控制元素†

  摘要：

  研究了不对称二溴苯的Suzuki偶联的区域化学结果。选择性取决于溴原子与烯烃取代基的接近程度，而不取决于空间或电子效应。扩展到一锅三组分Suzuki反应可实现有效的三联苯合成。

  DOI：

  10.1039/c5ob00717h
• 作为产物：
  描述：

  2,4-二溴甲苯 在 N-溴代丁二酰亚胺(NBS) 、 正丁基锂 、 silver nitrate 作用下， 以 四氢呋喃 、 四氯化碳 、 乙醇 、 水 为溶剂， 反应 6.5h， 生成 2,4-二溴苯乙烯
  参考文献：
  名称：

  通过 1,3-卤素迁移铜催化回收卤素活化基团

  摘要：

  Cu(I) 催化的 1,3-卤素迁移反应通过将溴或碘从 sp(2) 转移到苄基碳并伴随 Ar-X 键的硼化，有效地回收了活化基团。所得苄基卤可以在同一容器中在各种条件下反应以形成额外的碳-杂原子键。使用同位素富集的溴化物源的交叉实验支持 Br 的分子内转移。假设该反应通过邻卤苯乙烯的马尔科夫尼科夫氢铜反应、所得 Cu(I) 络合物氧化加成到 Ar-X 键中、还原消除新的 sp(3) CX 键和最终硼化反应进行Ar-Cu(I) 物种翻转催化循环。

  DOI：

  10.1021/ja306446m

文献信息

• Transition metal compound, polymerization-initiator system comprising the same, and process for producing polymer
  申请人：Uemura Makoto

  公开号：US20070270521A1

  公开（公告）日：2007-11-22

  A transition metal compound represented by the formula, [(CpR 1 m )(CO) 2 M 1 ][M 2 (CO) 2 (CpR 2 n )], wherein Cp is a cyclopentadienyl ring, R 1 and R 2 are independently of each other a hydrocarbyl group having 1 to 20 carbon atoms, and each of at least one R 1 and at least one R 2 is a hydrocarbyl group having 5 to 20 carbon atoms, m and n are independently of each other an integer of 1 to 5, and M 1 and M 2 are independently of each other a transition metal atom of the group 8 in the periodic table of elements; a polymerization-initiator system comprising said transition metal compound; and a process for producing a polymer in the presence of the polymerization-initiator system.

  一个由该公式表示的过渡金属化合物，[(CpR1m)(CO)2M1][M2(CO)2(CpR2n)]，其中Cp是一个环戊二烯环，R1和R2是独立的烃基团，含有1至20个碳原子，至少一个R1和至少一个R2是含有5至20个碳原子的烃基团，m和n是独立的1至5的整数，M1和M2是元素周期表中8族的过渡金属原子；包括所述过渡金属化合物的聚合物化引发剂系统；以及在聚合物化引发剂系统存在的情况下生产聚合物的过程。
• BLOCK COPOLYMER COMPOSITION, METHOD FOR PRODUCING THE SAME, AND FILM OF THE SAME
  申请人：Takeshi Ooishi

  公开号：US20110046307A1

  公开（公告）日：2011-02-24

  A block copolymer composition comprising an aromatic vinyl-conjugated diene-aromatic vinyl block copolymer having a high-level balance between a high elastic modulus and a small elongation set is provided. The block copolymer composition comprises a block copolymer A represented by formula (A) and a block copolymer B represented by formula (B), where the weight ratio of the block copolymer A to the block copolymer B, A/B, is from 36/64 to 85/15 and the ratio of the aromatic vinyl monomer units relative to all polymer components in the block copolymer composition is 27-70 wt %. Ar1 a -D a -Ar2 a (A). Ar1 b -D b -Ar2 b (B). (In the formulae, Ar1 a , Ar1 b and Ar2 b each represent an aromatic vinyl polymer block having a weight-average molecular weight of from 6,000 to 18,000; Ar2 a represents an aromatic vinyl polymer block having a weight-average molecular weight of from 40,000 to 400,000; D a and D b each represent a conjugated diene polymer block having a vinyl bond content of from 1 to 20% by mol; and D b has a weight-average molecular weight of from 60,000 to 400,000).

  提供了一种块状嵌段共聚物组合物，其包括具有高弹性模量和小延伸集之间高水平平衡的芳香族乙烯-共轭二烯-芳香族乙烯块状嵌段共聚物。该块状嵌段共聚物组合物包括由式（A）表示的块状共聚物A和由式（B）表示的块状共聚物B，其中块状共聚物A与块状共聚物B的重量比A/B为36/64至85/15，芳香族乙烯单体单元相对于块状嵌段共聚物组合物中的所有聚合物组分的比例为27-70重量％。Ar1a-Da-Ar2a（A）。Ar1b-Db-Ar2b（B）。 （在公式中，Ar1a，Ar1b和Ar2b各代表具有6,000至18,000的重均分子量的芳香族乙烯聚合物块；Ar2a代表具有40,000至400,000的重均分子量的芳香族乙烯聚合物块；Da和Db各代表具有1至20％摩尔的乙烯键含量的共轭二烯聚合物块；Db具有60,000至400,000的重均分子量）。
• COMPOSITION FOR STRETCHABLE FILM
  申请人：Oda Ryouji

  公开号：US20120088423A1

  公开（公告）日：2012-04-12

  The present invention provides a composition for a stretchable film, which achieves a high-level balance between a high elastic modulus and a small permanent elongation, which is excellent in adhesive force when laminated with a non-woven fabric or the like, and also has good formability. The present invention also provides a composition for a stretchable film comprising a block copolymer composition containing a block copolymer A represented by the following general formula (A) and a block copolymer B represented by the following general formula (B), and a polyolefin-based thermoplastic resin: Ar1 a -D a -Ar2 a (A) (Ar b -D b ) n -X  (B), in these formulas, Ar1 a and Ar b each represent an aromatic vinyl polymer block having a weight average molecular weight of 6,000 to 20,000; Ar2 a represents an aromatic vinyl polymer block having a weight average molecular weight of 40,000 to 400,000; D a and D b each represent a conjugated diene polymer block having a vinyl bond content of 1 mol % to 20 mol %; X represents a single bond or a residue of a coupling agent; and n represents an integer of 2 or greater.

  本发明提供了一种用于可拉伸薄膜的组成物，该组成物在高弹性模量和小永久伸长之间实现了高水平平衡，在与非织造布或类似物层压时具有优异的粘附力，并且具有良好的成形性。本发明还提供了一种用于可拉伸薄膜的组成物，包括以下通式（A）所表示的嵌段共聚物A和以下通式（B）所表示的嵌段共聚物B的嵌段共聚物组成物以及聚烯烃基热塑性树脂：Ar1a-Da-Ar2a（A）（Arb-Db）n-X（B），其中，Ar1a和Arb各代表具有6,000至20,000的重均分子量的芳香族乙烯聚合物块；Ar2a代表具有40,000至400,000的重均分子量的芳香族乙烯聚合物块；Da和Db各代表具有1摩尔％至20摩尔％的乙烯键含量的共轭二烯聚合物块；X代表单键或偶联剂的残基；n代表大于或等于2的整数。
• ADHESIVE COMPOSITION FOR LABELS
  申请人：Oda Ryouji

  公开号：US20110319549A1

  公开（公告）日：2011-12-29

  Provided is an adhesive composition for labels, which can be easily applied at a relatively low temperature and has satisfactory die cutting properties so that the adhesive composition can contribute to an improvement of the productivity of labels, and which is capable of producing labels having excellent holding power and tackiness. There is disclosed an adhesive composition for labels comprising: a block copolymer A represented by the following general formula (A); a polymer C, which is a polymer having a glass transition temperature of −30° C. or lower, or a block copolymer that has a polymer block having a glass transition temperature of −30° C. or lower at an end of the polymer chain; and a tackifier resin D. Ar1 a -D a -Ar2 a (A), in the general formula (A), Ar1 a represents an aromatic vinyl polymer block having a weight average molecular weight of 6,000 to 20,000; Ar2 a represents an aromatic vinyl polymer block having a weight average molecular weight of 22,000 to 400,000; and D a represents a conjugated diene polymer block having a vinyl bond content of 1 mol % to 20 mol %.

  提供的是一种用于标签的粘合剂组合物，可在相对较低的温度下轻松应用，并具有令人满意的模切性能，从而有助于提高标签的生产效率，并能够生产具有出色的持有力和粘附性的标签。公开了一种用于标签的粘合剂组合物，包括：由以下通式（A）表示的嵌段共聚物A；聚合物C，其为具有玻璃转移温度低于-30°C的聚合物，或者具有聚合物链末端具有玻璃转移温度低于-30°C的聚合物块的嵌段共聚物；以及粘合剂树脂D。在通式（A）中，Ar1a表示具有6,000至20,000的重均分子量的芳香族乙烯聚合物块；Ar2a表示具有22,000至400,000的重均分子量的芳香族乙烯聚合物块；D表示具有1摩尔％至20摩尔％的乙烯键含量的共轭二烯聚合物块。
• COMPOSITION FOR STRECHABLE FILM
  申请人：Ooishi Takeshi

  公开号：US20110318987A1

  公开（公告）日：2011-12-29

  Provided is a composition for a stretchable film, which achieves a high-level balance between a high elastic modulus and a small permanent set, and can be formed into a stretchable film with satisfactory formability. A composition for a stretchable film comprises a block copolymer composition containing a block copolymer A represented by the following general formula (A) and a block copolymer B represented by the following general formula (B), and a tackifier resin: Ar1 a -D a -Ar2 a (A) (Ar b -D b ) n -X   (B), in the general formulas (A) and (B), Ar1 a and Ar b each represent an aromatic vinyl polymer block having a weight average molecular weight of 6,000 to 20,000; Ar2 a represents an aromatic vinyl polymer block having a weight average molecular weight of 40,000 to 400,000; D a and D b each represent a conjugated diene polymer block having a vinyl bond content of 1 mol % to 20 mol %; X represents a single bond or a residue of a coupling agent; and n represents an integer of 2 or greater.

  提供的是一种可拉伸薄膜的组合物，它实现了高弹性模量和小永久变形之间的高水平平衡，并可以形成具有满意成形性的可拉伸薄膜。一种可拉伸薄膜的组合物包括含有以下一般式（A）所表示的块状嵌段聚合物A和以下一般式（B）所表示的块状嵌段聚合物B的块状嵌段聚合物组合物和粘合剂树脂：Ar1a-Da-Ar2a（A）（Arb-Db）n-X（B），在一般式（A）和（B）中，Ar1a和Arb各代表分子量为6,000至20,000的芳香族乙烯聚合物块；Ar2a代表分子量为40,000至400,000的芳香族乙烯聚合物块；Da和Db各代表具有1摩尔％至20摩尔％乙烯键含量的共轭二烯聚合物块；X代表单键或偶联剂残基；n代表大于等于2的整数。