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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

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Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
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Reactions at the Benzylic Position: Halogenation01:11

Reactions at the Benzylic Position: Halogenation

2.5K
Benzylic halogenation takes place under conditions that favor radical reactions such as heat, light, or a free radical initiator like peroxide.
2.5K
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene01:15

Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene

8.0K
Chlorination and bromination are important classes of electrophilic aromatic substitutions, where benzene reacts with chlorine or bromine in the presence of a Lewis acid catalyst to give halogenated substitution products. A Lewis acid such as aluminium chloride or ferric chloride catalyzes the chlorination, and ferric bromide catalyzes the bromination reactions. During the bromination of alkenes, bromine polarizes and becomes electrophilic. However, in the bromination of benzene, the bromine...
8.0K
Nucleophilic Aromatic Substitution: Elimination–Addition01:11

Nucleophilic Aromatic Substitution: Elimination–Addition

4.0K
Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is...
4.0K
Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

6.0K
Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
6.0K
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

46.9K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
46.9K

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Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
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Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes

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基C ((sp3) -H化是一种化.

Alexander P Atkins1, Alice C Dean1, Alastair J J Lennox1

  • 1University of Bristol, School of Chemistry, Bristol, BS8 1TS, U.K.

Beilstein journal of organic chemistry
|July 17, 2024
PubMed
概括
此摘要是机器生成的。

选择性化C ((sp3) -H键对于药物和农业化学开发至关重要. 本综述强调了实现选择性基C-H键化的各种策略和机制.

关键词:
CH功能化的功能化酸是什么? 酸是什么?化是指化.光电氧催化剂的催化作用

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Efficient Synthesis of Polyfunctionalized Benzenes in Water via Persulfate-promoted Benzannulation of &#945;,&#946;-Unsaturated Compounds and Alkynes
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科学领域:

  • 有机化学 有机化学
  • 药用化学 医学化学
  • 化学 的化学

背景情况:

  • 选择性化C ((sp3) -H键对于制造新药和农业化学品是非常理想的.
  • 基C ((sp3) -H键是特别重要的标,因为它们在生物活性分子中普遍存在.

研究的目的:

  • 为选择性化C ((sp3) -H的最新进展提供背景和概述.
  • 突出基化C-H化的多种策略和机制途径.

主要方法:

  • 审查关于C ((sp3) -H化方法的现有文献.
  • 基于机械路径的协议的分类.
  • 分析各种源及其反应性概况.

主要成果:

  • 报告了基化C ((sp3) -H的几种选择性方法.
  • 这些方法使用不同的机械方法.
  • 采用了各种各样的源,具有不同的反应性.

结论:

  • 基C(sp3) -H键的选择性化是一个活跃的研究领域.
  • 了解不同的战术是推动该领域发展的关键.
  • 预计持续的开发将在医学和农业领域产生新的应用.