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関連する概念動画

Acid Halides to Ketones: Gilman Reagent01:14

Acid Halides to Ketones: Gilman Reagent

3.7K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
3.7K
Elimination Reactions02:25

Elimination Reactions

16.3K
A nucleophile can react with an alkyl halide to give the substitution product by displacing the halogen. Or it can function as a base to give the elimination product by deprotonation of the neighboring carbon to form an alkene. In an elimination reaction, the substrate loses two groups from adjacent carbons forming at least one π bond. The carbon attached to the halogen is called the α carbon, while the adjacent carbon is called the β carbon; hence, these reactions are called...
16.3K
Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism01:18

Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism

2.5K
Birch reduction uses solvated electrons as reducing agents. The reaction converts benzene to 1,4-cyclohexadiene. The reaction proceeds by the transfer of a single electron to the ring to form a benzene radical anion. This anion is highly basic—it abstracts a proton from the alcohol to form a cyclohexadienyl radical. Another single electron transfer gives the cyclohexadienyl anion. A proton transfer from the alcohol forms 1,4-cyclohexadiene. Since this reduction occurs via radical anion...
2.5K
Nucleophilic Aromatic Substitution: Elimination–Addition01:11

Nucleophilic Aromatic Substitution: Elimination–Addition

4.9K
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...
4.9K
Amines to Alkenes: Cope Elimination01:14

Amines to Alkenes: Cope Elimination

2.3K
Cope elimination reaction involves the conversion of tertiary amines to alkene using hydrogen peroxide under thermal conditions, as depicted in figure 1.
2.3K
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement01:21

[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement

3.2K
The Cope rearrangement is classified as a [3,3] sigmatropic shift in 1,5-dienes, leading to a more stable, isomeric 1,5-diene. The reaction involves a concerted movement of six electrons, four from two π bonds and two from a σ bond, via an energetically favorable chair-like transition state.
3.2K

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関連する実験動画

Updated: Dec 22, 2025

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

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C ((sp3) -CF3 五座標中性銅 ((III) コンプレックスからの還元性除去

Shuanshuan Liu1,2, He Liu2, Shihan Liu3

  • 1Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.

Journal of the American Chemical Society
|May 5, 2020
PubMed
まとめ
この要約は機械生成です。

研究者らは安定した銅 (III) 複合体を分離し,還元性除去により炭素-炭素結合を形成した. この基本的触媒過程は,以前は銅 (III) について研究されていなかったが,化学合成の新たな経路を提供している.

さらに関連する動画

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides

Published on: September 7, 2019

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関連する実験動画

Last Updated: Dec 22, 2025

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

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Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
11:04

Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides

Published on: September 7, 2019

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科学分野:

  • 有機金属化学
  • カタリシス
  • 合成化学

背景:

  • 高値の遅い移行金属からの還元性除去は,C-CとC-ヘテロ原子結合の形成に不可欠である.
  • Pt (IV),Pd (IV),Ni (III) /Ni (IV) およびAu (III) に対して研究されているが,中性Cu (III) 複合体からの還元性除去はほとんど研究されていない.

研究 の 目的:

  • 安定した中性Cu (III) 複合体の分離と反応性を報告する.
  • この新しいCu (III) 複合体からC−C結合形成のための還元性除去経路を調査する.

主な方法:

  • 5座標のニュートラル正方形のピラミッド型Cu (III) 複合体の分離と特徴付け.
  • 還元性除去産物 (CH3-CF3) の定量的な収量決定
  • 反応経路の解明のためのメカニズム研究

主要な成果:

  • 安定した5座標のニュートラル正方形ピラミッドCu (III) 複合体を成功裏に分離した.
  • Cu (III) 複合体は,量的に CH3-CF3 を得るために,還元的な除去を受けた.
  • 機械学的な研究は,3つの環の移行状態を通じて同期的な結合破裂/結合形成プロセスを示した.

結論:

  • 中性Cu (III) 複合体から還元性除去の実現可能性が示された.
  • 銅触媒を用いたC−C結合形成のための新しい合成経路を確立した.
  • 三つ組成の環の移行状態を含む還元性除去プロセスに関する機械的洞察を提供した.