このページは機械翻訳されています。他のページは英語で表示される場合があります。 View in English

三次アミドをニトロアレンでマングネス媒介による還元型トランスアミド化

  • 0Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , ISIC-LSCI, BCH 3305 , Lausanne 1015 , Switzerland.

|

|

まとめ

この要約は機械生成です。

研究者は,挑戦的な三次アミドのトランスアミド化のための新しい方法を開発しました. この新しいアプローチでは,ニトロアレンをマンガン金属の窒素源として使用し,アミド合成に触媒なしで効率的な変換を提供します.

科学分野

  • 有機化学
  • 合成方法論
  • カタリシス

背景

  • アミドは様々な産業用途を持つ重要な有機化合物です.
  • トランスアミデーションは,既存のアミドから新しいアミドを合成するための経路を提供します.
  • 三次アミドは,従来のトランスアミド化反応における基質として重要な課題を提示する.

研究 の 目的

  • 三次性アミドのトランスアミド化のための効果的で非常識な方法を開発する.
  • アミド合成のための還元条件下で窒素源としてのニトロアレンの使用を調査する.
  • この変換のための触媒のないシステムを特定します.

主な方法

  • トランスアミデーション反応の窒素源としてニトロアレンを使用する.
  • 変換を容易にするために 還元条件を利用します
  • 媒介剤としてマンガンの金属のみを使用することを調査し,追加の触媒の必要性を排除します.

主要な成果

  • 開発した方法を用いて,三次アミドのトランスアミド化が成功しました.
  • マンガンの金属は,共同触媒を必要とせずに,反応を効果的に媒介した.
  • 方法論は,幅広い基板範囲と,様々な機能群に対する高い耐性を示した.

結論

  • 三次アミドトランスアミド化のための非常識で効率的な方法が確立されています.
  • マンガン金属とニトロアレンの使用は,新しいアミド化合物への単純な,触媒のない経路を提供します.
  • このアプローチは,アミドの合成有用性を拡大し,有機合成のための貴重なツールを提供します.

関連する概念動画

Amides to Amines: LiAlH<sub>4</sub> Reduction 01:20

6.3K

Amide reduction with strong reducing agents like lithium aluminum hydride proceeds through a nucleophilic acyl substitution to form amines. Primary, secondary, and tertiary amides yield primary, secondary, and tertiary amines, respectively.
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.

Preparation of Amines: Reduction of Amides and Nitriles 01:13

3.1K

Nitriles can be reduced to primary amines using reducing agents like lithium aluminum hydride or catalytic hydrogenation. The reduction introduces an amino group with an extra carbon in the skeleton. Nitriles are formed from the reaction between alkyl halides and sodium cyanide through the SN2 mechanism. Primary alkyl halides are the preferred substrates to prepare nitriles.
Amides can be reduced to primary, secondary, and tertiary amines using catalytic hydrogenation, active metals like Fe,...

Tertiary Healthcare System 01:21

2.2K

Specialized care provided over an extended period is called tertiary care. Usually, a primary or secondary care physician will refer a patient to tertiary care. A patient's maximum physical and mental function is restored in tertiary care, which is caused due to the impact of a chronic illness or condition. Tertiary care aims to achieve the highest level of functioning possible while managing chronic illness. For example, a patient who falls and fractures their hip will need secondary care...

Preparation of Amides 01:29

4.1K

Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...

Nomenclature of Secondary and Tertiary Amines 01:12

5.2K

The secondary and tertiary amines are derivatives of ammonia, where two and three of its hydrogens are replaced by alkyl groups, respectively. Secondary and tertiary amines can be symmetrical with identical alkyl groups attached to the nitrogen atom or unsymmetrical when more than one type of alkyl group is present. The standard nomenclature of secondary and tertiary amines is similar to the names given to the primary amines. They are generally named alkylamines. As depicted in Figure 1, for...

Oxidation-Reduction Reactions 03:11

75.8K

Oxidation–Reduction Reactions

Earth’s atmosphere contains about 20% molecular oxygen, O2, a chemically reactive gas that plays an essential role in the metabolism of aerobic organisms and in many environmental processes that shape the world. The term oxidation was originally used to describe chemical reactions involving O2, but its meaning has evolved to refer to a broad and important reaction class known as oxidation–reduction (redox) reactions. 

Some redox reactions involve the...