1-(1-溴-2,2-二苯基乙烯基)-4-甲氧基苯 | 25354-48-7

• 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-(1-溴-2,2-二苯基乙烯基)-4-甲氧基苯
• 英文名称: 1-bromo-1-(p-methoxyphenyl)-2,2-diphenylethene
• 英文别名: 1-anisyl-2,2-diphenylvinyl bromide；1-(p-methoxyphenyl)-2,2-diphenylvinyl bromide；1-bromo-1-(4-methoxyphenyl)-2,2-diphenylethene；2,2-diphenyl-1-anisylvinyl bromide；1-(1-bromo-2,2-diphenylvinyl)-4-methoxybenzene；Benzene, 1-(1-bromo-2,2-diphenylethenyl)-4-methoxy-；1-(1-bromo-2,2-diphenylethenyl)-4-methoxybenzene
• CAS: 25354-48-7
• 化学式: C₂₁H₁₇BrO
• 分子量: 365.269
• InChiKey: PXBVOMSJXYYOBN-UHFFFAOYSA-N

物化性质

• 熔点：
  130 °C
• 沸点：
  444.1±33.0 °C(Predicted)
• 密度：
  1.306±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.5
• 重原子数：
  23
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.05
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1-(1-溴-2,2-二苯基乙烯基)-4-甲氧基苯 在 bis-triphenylphosphine-palladium(II) chloride 、 potassium phenolate 、 甲基三辛基氯化铵 、 potassium carbonate 、 三苯基膦 作用下， 以 水 、 甲苯 为溶剂， 反应 28.0h， 生成 2,6-Bis[4-[1-(4-methoxyphenyl)-2,2-diphenylethenyl]phenyl]pyridine
  参考文献：
  名称：

  Pyridine-cored V-shaped π-conjugated oligomers: synthesis and optical properties

  摘要：

  A new series of V-shaped pyridine-cored pi-conjugated oligomers are synthesized utilizing two-fold Heck/Suzuki coupling reactions. Optical properties of these compounds (lambda(max)=390-449 nm, phi(eta)=79-5%, in solutions) are discussed. They are shown to be thermally stable and soluble in common organic solvents. Stilbenoid oligomers exhibited much higher fluorescence quantum yields than tri- and tetra-phenylethylene substituted oligomers in solutions. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.06.096
• 作为产物：
  描述：

  1-(4-methoxyphenyl)-2,2-diphenylethanone 在 三溴化磷 、 N,N-二甲基甲酰胺 作用下， 以 二氯甲烷 为溶剂， 反应 72.0h， 生成 1-(1-溴-2,2-二苯基乙烯基)-4-甲氧基苯
  参考文献：
  名称：

  Stability−Reactivity Relation on the Reaction of β,β-Disubstituted Vinyl Cations with Ethanol

  摘要：

  A family of beta,beta-disubstituted alpha-(p-methoxyphenyl)vinyl cations has been generated by the laser flash photolysis of the corresponding vinyl bromides, and the rates of reactions of the cations with ethanol in acetonitrile have been measured at 25 degrees C. The observed rate constants differ greatly depending on the substituents, ranging from 3.05 x 10(5) L mol(-1) s(-1) to 8.18 x 10(7) L mol(-1) s(-1). The thermodynamic stabilities of the vinyl cations have been estimated by means of ab initio MO calculations for model compounds, which reveals that their stability is almost unaffected by beta,beta-dialkyl substituents. In the present system, therefore, the stability-reactivity relation, in which a less stable cation is expected to show higher reactivity, breaks down. Several model transition structures have been considered in the MO calculations, and the results indicate that the beta substituents can move away from the incoming nucleophile to avoid steric congestion but that there still exists a large steric repulsion in the transition state; The calculations indicate that the reactivity of the vinyl cations is primarily controlled by this steric effect, which is the reason for the breakdown of the stability-reactivity relationship.

  DOI：

  10.1021/jo9603441

文献信息

• Why Are Vinyl Cations Sluggish Electrophiles?
  作者：Peter A. Byrne、Shinjiro Kobayashi、Ernst-Ulrich Würthwein、Johannes Ammer、Herbert Mayr

  DOI：10.1021/jacs.6b10889

  日期：2017.2.1

  slowly with trifluoroethanol than the parent benzhydrylium ion (Ph)2CH+, even though in solvolysis reactions (80% aqueous ethanol at 25 °C) the vinyl bromides leading to 2 and 3 ionize much more slowly (half-lives 1.15 yrs and 33 days) than (Ph)2CH-Br (half-life 23 s). The origin of this counterintuitive phenomenon was investigated by high-level MO calculations. We report that vinyl cations are not

  乙烯基阳离子 2 [Ph2C=C+-(4-MeO-C6H4)] 和 3 [Me2C=C+-(4-MeO-C6H4)]（由激光闪光光解产生）与多种亲核试剂（例如、吡咯、卤化物离子和含有不同量水或醇的溶剂）已通过光度法测定。发现亲核试剂对这些乙烯基阳离子的反应顺序与对二芳基碳鎓离子（二苯甲基鎓离子）的反应顺序相同。然而，乙烯基阳离子的反应速率受亲核试剂变化的影响仅是二苯甲基离子的反应速率的一半。因此，乙烯基阳离子和二苯甲基离子的相对反应性在很大程度上取决于亲核试剂的性质。结果表明，乙烯基阳离子 2 和 3 分别反应，使用三氟乙醇比母体二苯鎓离子 (Ph)2CH+ 慢 227 和 14 倍，即使在溶剂分解反应（25°C 时为 80% 乙醇水溶液）中，导致 2 和 3 的乙烯基溴离子化得更慢（半衰期 1.15年和 33 天）比 (Ph)2CH-Br（半衰期 23 秒）。通过高级 MO 计算研究了这
• Lifetimes and UV-visible absorption spectra of benzyl, phenethyl, and cumyl carbocations and corresponding vinyl cations. A laser flash photolysis study
  作者：Frances L Cozens、V M Kanagasabapathy、Robert A McClelland、Steen Steenken

  DOI：10.1139/v99-210

  日期：1999.12.5

  Benzyl (4-MeO, 4-Me, and 4-methoxy-1-naphthylmethyl), phenethyl (4-Me₂N, 4-MeO, 3,4-(MeO)₂, 4-Me, 3-Me, 4-F, 3-MeO, 2,6-Me₂, parent, and 4-methoxy-1-naphthylethyl) and cumyl (4-Me₂N, 4-MeO, 4-Me, parent) cations have been studied by laser flash photolysis (LFP) in 2,2,2-trifluoroethanol (TFE) and 1,1,1,3,3,3-hexafluoroisopropanol (HFIP). In most cases styrene or α-methylstyrene precursors were employed for the phenethyl and cumyl ions, the intermediate being obtained by solvent protonation of the excited state. Benzyl cations were generated by photoheterolysis of trimethylammonium and chloride precursors. While a 4-MeO substituent provides sufficient stabilization to permit observation of cations in TFE, cations with less stabilizing substituents usually require the less nucleophilic HFIP. Even in this solvent, the parent benzyl cation is too short-lived (lifetime <20 ns) to be observed. When generated in HFIP, phenethyl cations can be seen to react with unphotolyzed styrene, giving rise to dimer cations that are observed to grow in as the initial phenethyl cation decays. The dimer cations, in common with the oligomer cations seen in cationic styrene polymerization, have a λ_max 15-20 nm higher than the monomer and react with both solvent and styrene several orders of magnitude more slowly. This stabilization relative to the phenethyl may reflect an interaction with the aryl group present at the gamma-carbon. Cations 4-MeOC₆H₄C⁺(R)-CH₃ (R = Me, Et, i-Pr, t-Bu, cyclopropyl, C₆H₅, 4-MeOC₆H₄) were generated in TFE via the photoprotonation route. The alkyl series shows that steric effects are important in the decay reaction. The cation with R = cyclopropyl is a factor of 1.5 less reactive than the cation where R = phenyl. Several vinyl cations have also been generated by photoprotonation of phenylacetylenes. ArC⁺=CH₂ has a reactivity very similar to that of its analog ArC⁺H-CH₃, the vinyl cation being slightly (factors of 2-5) shorter-lived. For the various series of cations, including vinyl, substituents in the aryl ring have a consistent effect on the λ_max, a shift to higher wavelength relative to hydrogen of 15 nm for 4-Me, 30 nm for 4-MeO, and 50 nm for 4-Me₂N.Key words: photogenerated carbocations, carbocation lifetime, styrene, photoprotonation.

  苯甲基（4-MeO，4-Me和4-甲氧基-1-萘基甲基）、苯乙基（4-Me2N，4-MeO，3,4-(MeO)2，4-Me，3-Me，4-F，3-MeO，2,6-Me2，母体和4-甲氧基-1-萘基乙基）和叔丁基（4-Me2N，4-MeO，4-Me，母体）阳离子在2,2,2-三氟乙醇（TFE）和1,1,1,3,3,3-六氟异丙醇（HFIP）中通过激光闪光光解（LFP）进行了研究。在大多数情况下，苯乙烯或α-甲基苯乙烯前体被用于苯乙基和叔丁基离子，中间体通过溶剂质子化激发态而获得。苯甲基阳离子是通过三甲基铵和氯化物前体的光异裂生成的。虽然4-MeO取代基提供了足够的稳定性以在TFE中观察到阳离子，但具有较少稳定取代基的阳离子通常需要较不亲核的HFIP。即使在这种溶剂中，母体苯甲基阳离子也太短寿命（寿命<20 ns）而无法观察到。在HFIP中生成的苯乙基阳离子可以看到与未经光解的苯乙烯反应，导致观察到的二聚体阳离子在初始苯乙基阳离子衰减时增长。与阳离子苯乙烯聚合中观察到的寡聚体阳离子一样，二聚体阳离子的λmax比单体高15-20 nm，并且与溶剂和苯乙烯反应速度慢几个数量级。相对于苯乙基的这种稳定性可能反映了与伽马碳上存在的芳基的相互作用。在TFE中通过光质子化途径生成了4-MeOC6H4C+(R)-CH3（R = Me，Et，i-Pr，t-Bu，环丙基，C6H5，4-MeOC6H4）阳离子。烷基系列表明立体效应在衰减反应中很重要。当R = 环丙基时，其反应性比R = 苯基的阳离子少1.5倍。还通过对苯乙炔的光质子化生成了几种乙烯阳离子。ArC+=CH2的反应性与其类似物ArC+H-CH3非常相似，乙烯阳离子寿命略短（2-5倍因子）。对于包括乙烯在内的各系列阳离子，芳香环中的取代基对λmax有一致的影响，相对于氢的15 nm的4-Me，30 nm的4-MeO和50 nm的4-Me2N的波长偏移。关键词：光产生的碳正离子，碳正离子寿命，苯乙烯，光质子化。
• Palladium-catalysed direct synthesis of benzo[b]thiophenes from thioenols
  作者：Kiyofumi Inamoto、Yukari Arai、Kou Hiroya、Takayuki Doi

  DOI：10.1039/b811362a

  日期：——

  The one-pot conversion of thioenols into benzo[b]thiophenes was achieved by using a simple palladium catalyst such as PdCl(2) or PdCl(2)(cod).

  通过使用简单的钯催化剂（例如PdCl（2）或PdCl（2）（cod）），将单烯醇单锅转化为苯并[b]噻吩。
• Synthesis of Multisubstituted Triphenylenes and Phenanthrenes by Cascade Reaction of <i>o</i>-Iodobiphenyls or (<i>Z</i>)-β-Halostyrenes with <i>o</i>-Bromobenzyl Alcohols through Two Sequential C–C Bond Formations Catalyzed by a Palladium Complex
  作者：Masayuki Iwasaki、Yasuhiro Araki、Shohei Iino、Yasushi Nishihara

  DOI：10.1021/acs.joc.5b01693

  日期：2015.9.18

  bearing both nucleophilic and electrophilic substituents, for the facile synthesis of polycyclic aromatic hydrocarbons. A palladium/electron-deficient phosphine catalyst efficiently coupled o-iodobiphenyls or (Z)-β-halostyrenes with o-bromobenzyl alcohols to afford triphenylenes and phenanthrenes, respectively. The present cascade reaction proceeded through deacetonative cross-coupling and sequential intramolecular

  邻溴苄醇已被开发为一种新型的带有亲核和亲电取代基的环化试剂，可轻松合成多环芳烃。钯/电子不足的膦催化剂有效地将邻碘联苯或（Z）-β-卤代苯乙烯与邻溴苄醇偶联，分别制得三亚苯基和菲。目前的级联反应是通过去乙酰化交叉偶联和顺序分子内环化进行的。大量实验数据表明，反应机理涉及1,4-钯迁移的平衡。
• Phenanthrene Synthesis by Palladium-Catalyzed Benzannulation with <i>o</i>-Bromobenzyl Alcohols through Multiple Carbon–Carbon Bond Formations
  作者：Masayuki Iwasaki、Yasuhiro Araki、Yasushi Nishihara

  DOI：10.1021/acs.joc.7b00848

  日期：2017.6.16

  benzannulation with o-bromobenzyl alcohols enabled the facile construction of phenanthrene skeletons via the sequential multiple carbon–carbon bond formations. A variety of multisubstituted phenanthrenes were synthesized by the reaction of (Z)-β-halostyrenes with o-bromobenzyl alcohols as well as by the three-component coupling of alkynes, aryl bromides, and o-bromobenzyl alcohols. The electron-deficient phosphine

  邻溴苄醇与钯催化的苯环合可以通过连续的多个碳-碳键形成而轻松地构建菲骨架。多种多取代菲的通过的（反应合成Ž）-β-卤代苯乙烯与ö -bromobenzyl醇以及由炔烃组成的三组分偶联，芳基溴化物和ö-溴苄醇。缺电子的膦配体在控制所用的两种不同有机卤化物的顺序氧化加成中起着重要作用，从而实现了以良好的收率选择性形成所需的菲。该合成方案也适用于高度稠合的多环芳族烃如四苯的合成。