9-(2-bromobenzylidene)-9H-fluorene | 1643-48-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 芴
• 英文名称: 9-(2-bromobenzylidene)-9H-fluorene
• 英文别名: 9-[(2-Bromophenyl)methylidene]fluorene
• CAS: 1643-48-7
• 化学式: C₂₀H₁₃Br
• 分子量: 333.227
• InChiKey: FKCILAUAKIVHON-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.8
• 重原子数：
  21
• 可旋转键数：
  1
• 环数：
  4.0
• 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：

  9-(2-bromobenzylidene)-9H-fluorene 在 palladium diacetate 、 四丁基溴化铵 、 potassium carbonate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以44%的产率得到苯并[b]荧蒽
  参考文献：
  名称：

  Synthesis of Spiro Polycyclic Aromatic Hydrocarbons by Intramolecular Palladium-Catalyzed Arylation

  摘要：

  The palladium-catalyzed intramolecular arylation reaction has been applied to the synthesis of the spiro polycyclic aromatic hydrocarbons and planar polycyclic aromatic hydrocarbons by formation of a six-membered ring. The reaction proceeds more readily with aryl bromides substituted with electron-withdrawing groups by using palladium acetate in N,N-dimethylformamide as the solvent. For the less reactive-p-methoxyaryl derivatives the use of LiI as an additive was shown to give the best results. The results obtained in the cyclization of nitro derivatives 21 and 23 suggest that the second step of the cyclization reaction is not an electrophilic substitution reaction.

  DOI：

  10.1021/jo962059n
• 作为产物：
  描述：

  (9-芴基)三苯基溴化磷 在 ammonium hydroxide 作用下， 生成 9-(2-bromobenzylidene)-9H-fluorene
  参考文献：
  名称：

  氟衍生物。十九。9-O-氯亚甲基亚砜和相关化合物。

  摘要：

  DOI：

  10.1021/jm00327a014

文献信息

• Synthesis of 9-Fluorenylidenes via Pd-Catalyzed C–H Vinylation with Vinyl Bromides
  作者：Shuai Yang、Yanghui Zhang

  DOI：10.1021/acs.orglett.1c02722

  日期：2021.10.15

  A facile and efficient approach for the synthesis of 9-fluorenylidenes has been developed via the palladium-catalyzed cross-coupling of 2-iodobiphenyls and vinyl bromides. The reaction involves the C–H activation of 2-iodobiphenyls and dual C–C bond formations. A range of 9-fluorenylidene derivatives, including diphenyldibenzofulvenes, can be synthesized with the reaction.

  通过钯催化的 2-碘联苯和乙烯基溴的交叉偶联，开发了一种简便有效的合成 9-芴基的方法。该反应涉及 2-碘联苯的 C-H 活化和双 C-C 键的形成。通过该反应可以合成一系列 9-芴基衍生物，包括二苯基二苯并富烯。
• Palladium-catalyzed coupling reaction of 2-iodobiphenyls with alkenyl bromides for the construction of 9-(diorganomethylidene)fluorenes
  作者：Ya-Heng Zhao、Jian-Long Wang、Yun-Bing Zhou、Miao-Chang Liu、Hua-Yue Wu

  DOI：10.1039/d1ob01547h

  日期：——

  protocol for the construction of 9-(diorganomethylidene)fluorenes through palladium-catalyzed coupling reactions of 2-iodobiphenyls with alkenyl bromides has been reported. The reaction proceeds through the C–H activation/oxidative addition/reduction elimination/intramolecular Heck coupling reaction to afford a series of 9-(diorganomethylidene)fluorenes with good yields. Control experiments demonstrate that

  已经报道了通过钯催化的 2-碘联苯与烯基溴的偶联反应构建 9-（二有机亚甲基）芴的原子经济协议。该反应通过C-H活化/氧化加成/还原消除/分子内Heck偶联反应进行，以良好的收率得到一系列9-(二有机亚甲基)芴。对照实验表明，五元钯环作为关键中间体，β-H 消除作为限速步骤。
• Effects of incorporating regioisomers and flexible rotors to direct aggregation induced emission to achieve stimuli-responsive luminogens, security inks and chemical warfare agent sensors
  作者：Laxmi Raman Adil、Parameswar Krishnan Iyer

  DOI：10.1039/d0cc02318c

  日期：——

  A simple design strategy to convert ACQ materials into bright AIE luminogens is demonstrated. Unique differences in photophysical properties were observed among them which gave rise to stimuli responsive behaviour and sensor for chemical warfare agents.

  展示了一种将ACQ材料转化为明亮的AIE发光体的简单设计策略。观察到它们之间的光物理性质的独特差异，从而产生了对刺激的响应行为和化学战剂传感器。
• Unravelling a bench-stable zinc-amide compound as highly active multitasking catalyst for radical-mediated selective alk(en)ylation of unactivated carbocycles under mild conditions
  作者：Sangita Sahoo、Subarna Manna、Arnab Rit

  DOI：10.1039/d3sc06334h

  日期：——

  compound bearing an amidated imidazolium salt towards C–C bond-forming reactions utilizing an array of alcohols, ranging from aliphatic to aromatic and, attractively, even secondary alcohols. Moreover, this readily scalable protocol, which proceeds via an underdeveloped radical-mediated borrowing hydrogen protocol (an aldehyde is generated from an alcohol, and subsequent condensation with indene/fluorene

  通过C-C 键形成对未活化的有机部分进行直接官能化长期以来一直令合成化学家着迷。尽管贱金属系统在该领域稳步兴起，但在单一催化剂中实现多任务活性以在温和条件下执行多个此类功能化是具有挑战性的。为了解决这个问题，我们在此报告了一种有效的方案，首次使用天然丰富且环保的锌衍生化合物，用醇作为绿色烷化剂对茚/芴进行选择性C-烷（烯）基化。值得注意的是，这项研究揭示了带有酰胺化咪唑鎓盐的稳定锌化合物在使用一系列醇（从脂肪族到芳香族，甚至仲醇）进行C-C键形成反应方面的独特潜力。此外，这种易于扩展的方案通过基于一系列对照实验建立的不发达的自由基介导的借氢方案（由醇产生醛，随后与茚/芴缩合提供相应的烯基化产物）进行，有效在温和条件下使用低催化剂负载即可轻松实现。值得注意的是，这种方法对烷基化或烯基化产物具有显着的选择性，具有高水平的官能团耐受性和化学选择性。至关重要的是，这些锌化合物的催化活性可归因于它们
• Derivatives of Fluorene. XIX.^1,2 9-o-Chlorocinnamylidenefluorene and Related Compounds
  作者：T. Lloyd Fletcher、Moses J. Namkung、John R. Dice、Sandra K. Schaefer

  DOI：10.1021/jm00327a014

  日期：1965.5