1-甲基-2-[(Z)-2-(2-甲基苯基)乙烯基]苯 | 36888-18-3

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 中文名称: 1-甲基-2-[(Z)-2-(2-甲基苯基)乙烯基]苯
• 英文名称: (E)-2,2'-dimethylstilbene
• 英文别名: (E)-1,2-di-o-tolylethene；(E)-1,2-bis(2-methylphenyl)ethene；(E)-2,2’-dimethylstilbene；1,2-di-o-tolylethene；Benzene, 1,1'-(1,2-ethenediyl)bis(2-methyl-；1-methyl-2-[(E)-2-(2-methylphenyl)ethenyl]benzene
• CAS: 36888-18-3
• 化学式: C₁₆H₁₆
• 分子量: 208.303
• InChiKey: ARZIVALJTPLLHF-VAWYXSNFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.9
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

安全信息

• 海关编码：
  2902909090

反应信息

• 作为反应物：
  描述：

  1-甲基-2-[(Z)-2-(2-甲基苯基)乙烯基]苯 在 四氯化碳 、 氢氧化钾 、 溴 作用下， 生成 1-甲基-2-[2-(2-甲基苯基)乙炔基]苯
  参考文献：
  名称：

  The Reaction of Potassium Amide in Liquid Ammonia with Diarylbromoethenes

  摘要：

  DOI：

  10.1021/ja01302a066
• 作为产物：
  描述：

  1-甲基-2-[2-(2-甲基苯基)乙炔基]苯 在 bis(η3-allyl-μ-chloropalladium(II)) 六甲基二硅烷 、 三苯基膦 作用下， 以 various solvent(s) 为溶剂， 反应 3.0h， 以95%的产率得到1-甲基-2-[(Z)-2-(2-甲基苯基)乙烯基]苯
  参考文献：
  名称：

  Reduction of alkynes into 1,2-dideuterioalkenes with hexamethyldisilane and deuterium oxide in the presence of a palladium catalyst

  摘要：

  发现六甲基二硅烷和重水的组合可以作为烷炔的氘转移试剂，在催化量的铂复合物的存在下，选择性地通过相应的（Z）异构体生成（E）-1,2-二氘烯。

  DOI：

  10.1039/b512245g

文献信息

• Flash vacuum pyrolysis over magnesium. Part 1. Pyrolysis of benzylic, other aryl/alkyl and aliphatic halides
  作者：R. Alan Aitken、Philip K. G. Hodgson、John J. Morrison、Adebayo O. Oyewale

  DOI：10.1039/b108663d

  日期：2002.1.23

  Flash vacuum pyrolysis over a bed of freshly sublimed magnesium on glass wool results in efficient coupling of benzyl halides to give the corresponding bibenzyls. Where an ortho halogen substituent is present further dehalogenation gives some dihydroanthracene and anthracene. Efficient coupling is also observed for halomethylnaphthalenes and halodiphenylmethanes while chlorotriphenylmethane gives 4,4′-bis(diphenylmethyl)biphenyl. By using α,α′-dihalo-o-xylenes, benzocyclobutenes are obtained in good yield, while the isomeric α,α′-dihalo-p-xylenes give a range of high thermal stability polymers by polymerisation of the initially formed p-xylylenes. Other haloalkylbenzenes undergo largely dehydrohalogenation where this is possible, in some cases resulting in cyclisation. Deoxygenation is also observed with haloalkyl phenyl ketones to give phenylalkynes as well as other products. With simple alkyl halides there is efficient elimination of HCl or HBr to give alkenes. For aliphatic dihalides this also occurs to give dienes but there is also cyclisation to give cycloalkanes and dehalogenation with hydrogen atom transfer to give alkenes in some cases. For 5-bromopent-1-ene the products are those expected from a radical pathway but for 6-bromohex-1-ene they are clearly not. For 2,2-dichloropropane and 1,1-dichloropropane elimination of HCl occurs but for 1,1-dichlorobutane, -pentane and -hexane partial hydrolysis followed by elimination of HCl gives E,E-, E,Z- and Z,Z- isomers of the dialk-1-enyl ethers and fully assigned 13C NMR data are presented for these. With 6-chlorohex-1-yne and 7-chlorohept-1-yne there is cyclisation to give methylenecycloalkanes and -cycloalkynes. The behaviour of 1,2-dibromocyclohexane and 1,2-dichlorocyclooctane under these conditions is also examined. Various pieces of evidence are presented that suggest that these processes do not involve generation of free gas-phase radicals but rather surface-adsorbed organometallic species.

  在玻璃棉上覆盖一层新升华的镁,进行闪式真空热解,能有效促使苄基卤化物耦合生成相应的联苄。当有邻位卤素取代基存在时,进一步脱卤生成部分二氢蒽和蒽。卤甲基萘和二苯基甲烷也能高效耦合,而三苯基氯甲烷则生成4,4′-双(二苯甲基)联苯。用α,α′-二卤代邻二甲苯可以获得较高产率的苯并环丁烯,而异构的α,α′-二卤代对二甲苯,通过形成的对二甲苯的聚合,可以得到一系列高热稳定性的聚合物。其他卤代烃苯大体上会脱卤化氢,某些情况下能产生环化反应。同样可以观察到,苯基卤代烷烃脱去羰基生成苯乙炔以及其他产物。简单的烷基卤化物则高效地脱去HCl或HBr生成烯烃。脂肪族二卤化物也会发生这一反应生成二烯,但不发生环化反应生成环烷烃,或在某些情况下发生氢原子转移的脱卤反应生成烯烃。5-溴戊-1-烯的产物符合自由基途径的预期,但6-溴己-1-烯并不符合。2,2-二氯丙烷和1,1-二氯丙烷能脱去HCl,但1,1-二氯丁烷、戊烷和己烷则能部分水解,随后脱去HCl,生成E,E-, E,Z-和Z,Z-异构体二烷-1-烯基醚,并且得到了这些物质的13C NMR全归属数据。6-氯己-1-炔和7-氯庚-1-炔能发生环化反应生成亚甲基环烷烃和环炔烃。本文还考察了1,2-二溴环己烷和1,2-二氯环辛烷在上述条件下的行为。本文给出了众多种证据,表明这些反应过程不涉及气相自由基的形成,而是表面吸附的金属有机物种。
• Photoinitiated carbonyl-metathesis: deoxygenative reductive olefination of aromatic aldehydes <i>via</i> photoredox catalysis
  作者：Shun Wang、Nanjundappa Lokesh、Johnny Hioe、Ruth M. Gschwind、Burkhard König

  DOI：10.1039/c9sc00711c

  日期：——

  carbonyl groups in a single reaction are less explored. Here, we report a photoredox-catalysis that uses B2pin2 as terminal reductant and oxygen trap allowing for deoxygenative olefination of aromatic aldehydes under mild conditions. This strategy provides access to a diverse range of symmetrical and unsymmetrical alkenes with moderate to high yield (up to 83%) and functional-group tolerance. To follow

  羰基-羰基烯化反应，即 McMurry 反应，代表了构建烯烃的有力策略。然而，在单个反应中直接偶联两个羰基的催化变体的探索较少。在这里，我们报告了一种使用 B 2 pin 2的光氧化还原催化作为末端还原剂和氧阱，允许在温和条件下对芳族醛进行脱氧烯化。该策略提供了获得各种对称和不对称烯烃的途径，具有中等至高产率（高达 83%）和官能团耐受性。为了遵循反应途径，进行了一系列实验，包括自由基抑制、氘标记、荧光猝灭和循环伏安法。此外，结合 NMR 研究和 DFT 计算来检测和分析三种活性中间体：环状三元阴离子物质、α-氧硼基碳负离子和 1,1-苄基二硼酸酯。基于这些结果，我们提出了一种 C C 键生成机制，涉及顺序自由基硼化、“bora-Brook”重排、B 2pin 2介导的脱氧和硼-维蒂希过程。
• An Efficient and General Method for the Heck and Buchwald–Hartwig Coupling Reactions of Aryl Chlorides
  作者：Dong-Hwan Lee、Abu Taher、Shahin Hossain、Myung-Jong Jin

  DOI：10.1021/ol202177k

  日期：2011.10.21

  The β-diketiminatophosphane Pd complex acted as a powerful catalyst for the Heck coupling of aryl chlorides with alkenes. Various aryl and heteroaryl chlorides were coupled efficiently under relatively mild conditions. Furthermore, this catalytic system also proved to be highly active in the Buchwald–Hartwig coupling of deactivated and sterically hindered aryl chlorides at room temperature.

  β-二酮基亚氨基膦Pd络合物可作为芳基氯化物与烯烃的Heck偶联的有力催化剂。在相对温和的条件下有效地偶联了各种芳基和杂芳基氯化物。此外，在室温下，这种催化体系在失活的和位阻的芳基氯化物的布赫瓦尔德-哈特维格偶联中也被证明具有很高的活性。
• Reaction of phenylcarbene formed from benzaldehyde tosylhydrazone in certain solvents
  作者：H. Nozaki、R. Noyori、K. Sisido

  DOI：10.1016/s0040-4020(01)98979-3

  日期：1964.1

  tosylhydrazone (I) with sodium methoxide in various solvents under irradiation and/or heating yields products arising from phenylcarbene (IV) which is produced by photolytic or pyrolytic decomposition of initially formed phenyldiazomethane (III). Reaction products originating solely from the tosylhydrazone (I) are (VI ∼ XI) while those produced by the interaction with solvents are formulated as addition

  在各种溶剂中在辐射和/或加热下用甲醇钠处理苯甲醛甲苯磺酰s（I），产生由苯基碳烯（IV）产生的产物，该产物是通过最初形成的苯基重氮甲烷（III）的光解或热解分解而产生的。仅源自甲苯磺酰hydr（I）的反应产物为（VI〜XI），而与溶剂相互作用产生的反应产物被配制成（VI）烯属和芳族CC键的加成产物和（IV）脂肪族的插入产物和芳族C aromaticH键。与苯胺的反应除环苄基化的化合物外，还以26％的收率产生（IV）到NH键或N-苄基苯胺的插入产物。邻甲苯二醛和2,4,6-三甲基苯甲醛甲苯磺酰hydr反应相似。
• Energy-Transfer-Mediated Photocatalysis by a Bioinspired Organic Perylenephotosensitizer HiBRCP
  作者：Yan Zhang、Mingze Xia、Min Li、Qian Ping、Zhenbo Yuan、Xuanzhong Liu、Huimin Yin、Shuping Huang、Yijian Rao

  DOI：10.1021/acs.joc.1c01876

  日期：2021.11.5

  triplet energy was greatly improved, and then, it could markedly promote the efficient geometrical isomerization of alkenes from the E-isomer to the Z-isomer. Moreover, it was also effective for energy-transfer-mediated organometallic catalysis, which allowed realization of the cross-coupling of aryl bromides and carboxylic acids through efficient energy transfer from HiBRCP to nickel complexes. Thus, the

  能量转移在光催化中起着特殊的作用，它通过间接激发利用激发态的势能，其中光敏剂决定了反应的热力学可行性。受天然产物尾孢菌素的能量转移能力的启发，我们通过对尾孢菌素的结构修饰，开发了一种绿色高效的有机光敏剂 HiBRCP（六异丁酰还原尾孢菌素）。经过结构操作后，其三重态能量大大提高，从而显着促进烯烃从E-异构体到Z-异构体的高效几何异构化。-异构体。此外，它对能量转移介导的有机金属催化也很有效，通过从 HiBRCP 到镍配合物的有效能量转移，可以实现芳基溴化物和羧酸的交叉偶联。因此，对结构操纵与其光物理性质之间关系的研究为尾孢菌素的进一步修饰提供了指导，可应用于更有意义和更具挑战性的能量转移反应。