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関連する概念動画

Amines to Amides: Acylation of Amines01:19

Amines to Amides: Acylation of Amines

2.7K
Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
2.7K
Preparation of Amines: Reduction of Oximes and Nitro Compounds01:29

Preparation of Amines: Reduction of Oximes and Nitro Compounds

4.1K
Oximes can be reduced to primary amines using catalytic hydrogenation, hydride reduction, or sodium metal reduction. The reduction of aliphatic and aromatic nitro compounds to primary amines takes place by either catalytic hydrogenation or by using active metals like Fe, Zn, and Sn in the presence of an acid.
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
4.1K
Preparation of Amines: Reductive Amination of Aldehydes and Ketones01:38

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

3.2K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
3.2K
Preparation of 1° Amines: Azide Synthesis01:22

Preparation of 1° Amines: Azide Synthesis

4.2K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
4.2K
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism01:26

Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism

3.6K
The Hofmann and Curtius rearrangement reactions can be applied to synthesize primary amines from carboxylic acid derivatives such as amides and acyl azides. In the Hofmann rearrangement, a primary amide undergoes deprotonation in the presence of a base, followed by halogenation to generate an N-haloamide. A second proton abstraction produces a stabilized anionic species, which rearranges to an isocyanate intermediate via an alkyl group migration from the carbonyl carbon to the neighboring...
3.6K
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview01:07

Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview

3.3K
In the presence of an aqueous base and a halogen, primary amides can lose the carbonyl (as carbon dioxide) and undergo rearrangement to form primary amines. This reaction, called the Hofmann rearrangement, can produce primary amines (aryl and alkyl) in high yields without contamination by secondary and tertiary amines.
3.3K

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Updated: Sep 21, 2025

Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
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交流電流の周波数による選択的なアミン機能化のための1または2電子酸化制御

Disni Gunasekera1, Jyoti P Mahajan1, Yanick Wanzi1

  • 1Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States.

Journal of the American Chemical Society
|May 27, 2022
PubMed
まとめ
この要約は機械生成です。

研究者は,交流電流 (AC) 周波数を用いて選択的なアミン酸化のための新しい電気合成方法を開発しました. このアプローチは,アリレーション製品のための重要な中間物質を生成し,複雑な化学反応を簡素化し,最適な条件を予測します.

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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte
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Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

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Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
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Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives

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科学分野:

  • 有機電気化学
  • 合成有機化学
  • カタリシス

背景:

  • 三次アミンの選択的酸化は,有価な有機化合物の合成に不可欠である.
  • 伝統的な方法はしばしば化学的選択性と闘い,イミニウムカチオンのような望ましくない副産物につながります.
  • 電気合成のための反応条件の最適化には,通常,時間のかかる試行錯誤手順が含まれます.

研究 の 目的:

  • 三次アミンの選択的1電子酸化のための新しい電気合成方法を開発する.
  • 効率的にα-アミノラジカル中間物質を生成し,イミニウムカチオンへの2電子酸化を回避する.
  • 交流電流 (AC) の電解条件を最適化するための予測方法を確立する.

主な方法:

  • 独特の交流電流 (AC) 周波数を使用する電気合成.
  • 電気化学的記述器を特定するためのサイクル電圧測定試験
  • 様々なアミン基板の最適AC周波数を予測するための記述子の適用.

主要な成果:

  • 三次アミンの選択的1電子酸化をα-アミノラジカル中間物質に達成した.
  • AC周波数を制御することで,アリレーション製品へのアクセスを容易にします.
  • 最適な交流周波数を予測し,最適化時間を短縮するための信頼性の高い電気化学記述器を特定しました.

結論:

  • 開発されたAC電解法は,有機合成における化学選択性の課題を解決するための強力な代替案を提供します.
  • 予測ディスクリプタは,電気合成反応の最適化プロセスを簡素化します.
  • この研究は,より効率的で予測可能なアプローチを提供することで,電気有機合成の分野を前進させています.