1-(biphenyl-2-yl)ethanone p-toluenesulphonylhydrazone | 183313-44-2

• 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-(biphenyl-2-yl)ethanone p-toluenesulphonylhydrazone
• CAS: 183313-44-2
• 化学式: C₂₁H₂₀N₂O₂S
• 分子量: 364.468
• InChiKey: IUNYGMQLGWRGCX-UHFFFAOYSA-N

物化性质

• 沸点：
  542.8±53.0 °C(Predicted)
• 密度：
  1.16±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.36
• 重原子数：
  26.0
• 可旋转键数：
  5.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  58.53
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  1-(biphenyl-2-yl)ethanone p-toluenesulphonylhydrazone 在 sodium hydroxide 作用下， 以 1,4-二氧六环 、 苯 为溶剂， 反应 1.0h， 生成 1-(2-联苯基)乙酮
  参考文献：
  名称：

  Intramolecular reactivity of arylcarbenes: Biphenyl-2-ylcarbenes

  摘要：

  Biphenyl-2-ylcarbenes, 2-ArC(6)H(4)CR, were generated photolytically and thermally from diazo precursors. Cyclization, leading to fluorenes, competes with capture of the carbenes by methanol but proceeds faster than intramolecular hydrogen shifts (with R = Me) and intermolecular C-H insertion reactions (with R = H in cyclohexane). By comparison of product ratios with kinetic data for related carbenes from the literature, the cyclization rate is estimated as ca 10(11) s(-1). The intramolecular reactivity of biphenyl-2-ylcarbenes is nor significantly attenuated by variation of R (R = H, Me, Ph). Very minor effects of triplet sensitization and methanol quenching indicate that fluorenes arise from spin-equilibrated biphenyl-2-ylcarbenes, presumably from the singlet state. When Ar = mesityl, the carbene predominantly inserts into C-H bonds of the 2'-methyl groups, giving rise to a dihydrophenanthrene. Formation of a fluorene derivative, by formal insertion into C-C bonds, occurs as a minor process. This unprecedented reaction points to intervention of an o-xylylene in which the methyl group migrates. Laser flash photolysis (LFP) of 2-PhC(6)H(4)CN(2)Ph generates a transient absorption which is due to the T-0-->T-n transition of 9-phenylfluorene rather than to the presumed o-xylylene. On LFP of 2-ArC(6)H(4)CN(2)Ph in trifluoroethanol-acetonitrile, protonation of the carbenes gives rise to carbocations, 2-ArC(6)H(4)CH(+)Ph. The transient absorption spectra of these cations are strongly influenced by twisting about the Ar-Ar bond (Ar = Ph < o-tolyl < mesityl) whereas the rates of nucleophilic capture vary only slightly. Biphenyl-2-ylcarbenium ions (Ar = R = Ph) cyclize more slowly than the analogous carbenes, by a factor of greater than or equal to 10(4).

  DOI：

  10.1002/(sici)1099-1395(199609)9:9<598::aid-poc825>3.0.co;2-l
• 作为产物：
  描述：

  二氢-3-(异十二碳烯基)呋喃-2,5-二酮 以 甲醇 为溶剂， 反应 16.0h， 生成 1-(biphenyl-2-yl)ethanone p-toluenesulphonylhydrazone
  参考文献：
  名称：

  Intramolecular reactivity of arylcarbenes: Biphenyl-2-ylcarbenes

  摘要：

  Biphenyl-2-ylcarbenes, 2-ArC(6)H(4)CR, were generated photolytically and thermally from diazo precursors. Cyclization, leading to fluorenes, competes with capture of the carbenes by methanol but proceeds faster than intramolecular hydrogen shifts (with R = Me) and intermolecular C-H insertion reactions (with R = H in cyclohexane). By comparison of product ratios with kinetic data for related carbenes from the literature, the cyclization rate is estimated as ca 10(11) s(-1). The intramolecular reactivity of biphenyl-2-ylcarbenes is nor significantly attenuated by variation of R (R = H, Me, Ph). Very minor effects of triplet sensitization and methanol quenching indicate that fluorenes arise from spin-equilibrated biphenyl-2-ylcarbenes, presumably from the singlet state. When Ar = mesityl, the carbene predominantly inserts into C-H bonds of the 2'-methyl groups, giving rise to a dihydrophenanthrene. Formation of a fluorene derivative, by formal insertion into C-C bonds, occurs as a minor process. This unprecedented reaction points to intervention of an o-xylylene in which the methyl group migrates. Laser flash photolysis (LFP) of 2-PhC(6)H(4)CN(2)Ph generates a transient absorption which is due to the T-0-->T-n transition of 9-phenylfluorene rather than to the presumed o-xylylene. On LFP of 2-ArC(6)H(4)CN(2)Ph in trifluoroethanol-acetonitrile, protonation of the carbenes gives rise to carbocations, 2-ArC(6)H(4)CH(+)Ph. The transient absorption spectra of these cations are strongly influenced by twisting about the Ar-Ar bond (Ar = Ph < o-tolyl < mesityl) whereas the rates of nucleophilic capture vary only slightly. Biphenyl-2-ylcarbenium ions (Ar = R = Ph) cyclize more slowly than the analogous carbenes, by a factor of greater than or equal to 10(4).

  DOI：

  10.1002/(sici)1099-1395(199609)9:9<598::aid-poc825>3.0.co;2-l

文献信息

• Copper-Catalyzed Direct Benzylation or Allylation of 1,3-Azoles with <i>N</i>-Tosylhydrazones
  作者：Xia Zhao、Guojiao Wu、Yan Zhang、Jianbo Wang

  DOI：10.1021/ja111249p

  日期：2011.3.16

  Cu-catalyzed cross-coupling of N-tosylhydrazones with 1,3-azoles leads to the direct C-H benzylation or allylation. Cu carbene migratory insertion is proposed to play the key role in this transformation.

  铜催化的 N-甲苯磺酰腙与 1,3-唑的交叉偶联导致直接的 CH 苄基化或烯丙基化。提出Cu卡宾迁移插入在这种转变中起关键作用。
• Transition-Metal-Free Intramolecular Carbene Aromatic Substitution/Büchner Reaction: Synthesis of Fluorenes and [6,5,7]Benzo-fused Rings
  作者：Zhenxing Liu、Haocheng Tan、Long Wang、Tianren Fu、Ying Xia、Yan Zhang、Jianbo Wang

  DOI：10.1002/anie.201409982

  日期：2015.3.2

  Intramolecular aromatic substitution and Büchner reaction have been established as powerful methods for the construction of polycyclic compounds. These reactions are traditionally catalyzed by RhII catalysts with α‐diazocarbonyl compounds as the substrates. Herein a transition‐metal‐free intramolecular aromatic substitution/Büchner reaction is presented. These reactions use readily available N‐tosylhydrazones

  分子内芳族取代和Büchner反应已被认为是构建多环化合物的有力方法。传统上，这些反应是由Rh II催化剂以α-重氮羰基化合物为底物催化的。本文介绍了无过渡金属的分子内芳族取代/Büchner反应。这些反应使用现成的N-甲苯磺酰hydr作为重氮化合物的前体，并显示出较宽的底物范围。