1,4-di(9H-fluoren-9-ylidene)cyclohexane | 1039752-42-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 芴
• 英文名称: 1,4-di(9H-fluoren-9-ylidene)cyclohexane
• 英文别名: 9-(4-Fluoren-9-ylidenecyclohexylidene)fluorene
• CAS: 1039752-42-5
• 化学式: C₃₂H₂₄
• 分子量: 408.543
• InChiKey: YEBAVWUGOHPVNL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.9
• 重原子数：
  32
• 可旋转键数：
  0
• 环数：
  7.0
• 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

反应信息

• 作为产物：
  描述：

  4-fluoren-9-ylidene-cyclohexanone 、 9-(三甲基甲硅烷基)芴 在 正丁基锂 作用下， 以 四氢呋喃 为溶剂， 反应 16.0h， 生成 1,4-di(9H-fluoren-9-ylidene)cyclohexane
  参考文献：
  名称：

  Antiaromatic Spacer-Bridged Bisfluorenyl Dications Generated by Superacid Induced Ionization

  摘要：

  Derivatives of the dication of tetrabenzo[5.5]fulvalene were prepared with phenyl and ethynyl spacers through ionization of the appropriate bis-methylethers. The antiaromaticity shown by the parent dication was demonstrated for these dications with spacers, although it was attenuated by the presence of the spacer. It was substantially greater than that of fluorenyl monocations with similar substituents. Antiaromaticity was evaluated through comparison of (1)H NMR shifts with those of acyclic analogues, through nucleus independent chemical shifts, and through magnetic susceptibility exaltation. Although the fluorenyl systems are separated by spacers, the antiaromaticity of one system is affected by the other remote fluorenyl system. An explanation for this interaction may lie in the ability of a remote cationic substituent to attenuate delocalization in the spacer. The use of spacers is designed to prevent side reactions in less stable antiaromatic dications, allowing exploration of a number of species that have previously been inaccessible.

  DOI：

  10.1021/ja711501k

文献信息

• 9-Stannafluorenes: 1,4-Dimetal Equivalents for Aromatic Annulation by Double Cross-Coupling
  作者：Ikuhiro Nagao、Masaki Shimizu、Tamejiro Hiyama

  DOI：10.1002/anie.200903779

  日期：2009.9.28

  Double or nothing! A straightforward and high‐yielding approach to a variety of polycyclic aromatic hydrocarbons has been achieved through palladium‐catalyzed annulation of 9,9‐dimethyl‐9‐stannafluorenes and dithienostannole with 1,2‐dihaloarenes (see scheme). In addition, 1,1‐dibromo‐1‐alkenes can also be applied to this annulation to produce dibenzofulvenes in excellent yields.

  双倍或一无所有！通过钯催化的1,2-二卤代芳烃与9,9-二甲基-9-锡芴和二噻吩并环戊烷实现了直接，高产的多种多环芳烃方法。此外，还可以将1,1-二溴-1-烯用于该环合反应，以高收率生产二苯并富烯。
• New Synthesis of Dibenzofulvenes by Palladium-Catalyzed Double Cross-Coupling Reactions
  作者：Masaki Shimizu、Ikuhiro Nagao、Shin-ichi Kiyomoto、Tamejiro Hiyama

  DOI：10.1071/ch12060

  日期：——

  Palladium-catalyzed double cross-coupling reactions of 1,1-bis(pinacolato)borylalk-1-enes with 2,2′-dibromobiaryls and of 9-stannafluorenes with 1,1-dibromoalk-1-enes have been demonstrated to serve as new synthetic methods for dibenzofulvenes.

  已证明钯催化的1,1-双（频哪醇）硼烷基-1-烯与2,2'-二溴联芳基和9-芴与1,1-二溴烷基-1-烯的双交叉偶联可以用作二苯并富勒烯的新合成方法。
• Antiaromatic Spacer-Bridged Bisfluorenyl Dications Generated by Superacid Induced Ionization
  作者：Bart J. Dahl、Nancy S. Mills

  DOI：10.1021/ja711501k

  日期：2008.8.1

  Derivatives of the dication of tetrabenzo[5.5]fulvalene were prepared with phenyl and ethynyl spacers through ionization of the appropriate bis-methylethers. The antiaromaticity shown by the parent dication was demonstrated for these dications with spacers, although it was attenuated by the presence of the spacer. It was substantially greater than that of fluorenyl monocations with similar substituents. Antiaromaticity was evaluated through comparison of (1)H NMR shifts with those of acyclic analogues, through nucleus independent chemical shifts, and through magnetic susceptibility exaltation. Although the fluorenyl systems are separated by spacers, the antiaromaticity of one system is affected by the other remote fluorenyl system. An explanation for this interaction may lie in the ability of a remote cationic substituent to attenuate delocalization in the spacer. The use of spacers is designed to prevent side reactions in less stable antiaromatic dications, allowing exploration of a number of species that have previously been inaccessible.