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Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

8.1K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
8.1K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

6.2K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
6.2K
Acid-Catalyzed Ring-Opening of Epoxides02:24

Acid-Catalyzed Ring-Opening of Epoxides

7.8K
Epoxides that are three-membered ring systems are more reactive than other cyclic and acyclic ethers. The high reactivity of epoxides originates from the strain present in the ring. This ring strain acts as a driving force for epoxides to undergo ring-opening reactions either with halogen acids or weak nucleophiles in the presence of mild acid. The acid catalyst converts the epoxide oxygen, a poor leaving group, into an oxonium ion, a better leaving group, making the reaction feasible. The...
7.8K
Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

3.6K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.6K
Autoxidation of Ethers to Peroxides and Hydroperoxides02:23

Autoxidation of Ethers to Peroxides and Hydroperoxides

8.5K
Ethers represent a class of chemical compounds that become more dangerous with prolonged storage because they tend to form explosive peroxides when standing in the air. Autoxidation is the spontaneous oxidation of a compound in air. In the presence of oxygen, ethers slowly oxidize to form hydroperoxides and dialkyl peroxides.
8.5K
Preparation of Epoxides03:00

Preparation of Epoxides

8.2K
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
8.2K

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Updated: Oct 8, 2025

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
06:39

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

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エポキシード電還元

Cheng Huang1, Wan Ma1, Xuelian Zheng1

  • 1The Institute for Advanced Studies (IAS), Wuhan University, Wuhan 430072, P. R. China.

Journal of the American Chemical Society
|December 29, 2021
PubMed
まとめ
この要約は機械生成です。

この研究は,アルコールを合成するための新しい方法である電気化学的エポキシード水素化を導入します. 選択的なマルコフニコフ・リング開封を移行金属なしで達成し,強力な新合成経路を提供します.

さらに関連する動画

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes

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Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
06:39

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes

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科学分野:

  • 有機化学
  • 電気化学
  • カタリシス

背景:

  • エポキシドの選択的水素化は,アルコール合成の重要な変換である.
  • 既存の方法はしばしば移行金属の触媒を必要とし,地域選択性で苦労します.
  • メタルフリーで選択的なエポキシード機能化の開発は大きな課題です.

研究 の 目的:

  • エポキシドの選択的水素化のための新しい電気化学的方法の開発.
  • 電子と陽子を還元剤として使用してエポキシドから直接アルコール合成を達成する.
  • エポキシードリングの開口におけるマルコヴニコフとアンチマルコヴニコフの領域選択性を探求する.

主な方法:

  • 電子と陽子を用いたエポキシドの電気化学的還元.
  • 一次,二次,三次エポキシドの広い範囲を使用します.
  • インサイトラジカル中間物質と運動分析を含むメカニズム研究.

主要な成果:

  • 一次性,二次性,三次性アルコールの合成に成功した.
  • 選択的なマーコヴニコフとアンチマーコヴニコフエポキシードリングの開封の実証
  • 地域選択性を制御する要因の特定:ベンジル基 (アリルエポキシド) の熱力学的安定性および運動制御 (アルキルエポキシド).

結論:

  • 電気化学的エポキシド水素化は,アルコールへの多用途で金属のない経路を提供します.
  • 地域選択性は,基質の種類と反応メカニズムに基づいて正確に制御できます.
  • このアプローチは,アルコール合成の持続可能で効率的な代替案です.