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関連する概念動画

Carboxylic Acids to Methylesters: Alkylation using Diazomethane01:33

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
Carbocations02:10

Carbocations

Carbocations are one of the reaction intermediates formed during several nucleophilic substitutions or elimination reactions. A carbocation is an electron-deficient species with the central carbon atom having six electrons and three bonded atoms. The central carbon in a carbocation is sp2 hybridized with trigonal planar geometry. It has an empty p orbital perpendicular to the plane of the structure that can accept electrons. Thus, carbocations act as strong electrophiles and may react with any...
Amines to Amides: Acylation of Amines01:19

Amines to Amides: Acylation of Amines

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 amide...
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism01:26

Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism

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...
Amides to Amines: LiAlH4 Reduction01:20

Amides to Amines: LiAlH4 Reduction

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.
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...

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Updated: Jun 7, 2026

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

炭酸カルボアニルアミディネート

Peter Dröse1, Cristian G Hrib, Frank T Edelmann

  • 1Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany.

Journal of the American Chemical Society
|October 22, 2010
PubMed
まとめ
この要約は機械生成です。

N,N'-ダイアルキルカルボディイミドとリチオオルトカルボランから合成された新型カルボラニラミディネートアニオンは,ユニークなボロン豊富なリガンドシステムを提供します. これらのアニオンは,窒素と炭素経由で,窒素の化ではなく,リチウム,チン,クロムなどの金属に意外に調整されます.

さらに関連する動画

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
07:56

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron

Published on: August 12, 2019

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
12:27

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes

Published on: September 8, 2013

関連する実験動画

Last Updated: Jun 7, 2026

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
10:44

Isolating Free Carbenes, their Mixed Dimers and Organic Radicals

Published on: April 19, 2019

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron
07:56

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyl(tropone)iron

Published on: August 12, 2019

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
12:27

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes

Published on: September 8, 2013

科学分野:

  • 有機金属化学 有機金属化学
  • ボロン化学 ボロン化学
  • リガンドデザインはリガンドデザインです.

背景:

  • カーボランは,独特の電子特性を有するケージ状のボロンクラスターです.
  • 新しいリガンドの開発は,協調化学の進歩に不可欠です.
  • 不機能リガンドは,金属の中心に多用途の結合モードを提供します.

研究 の 目的:

  • 新しいカルボラニラミディネートアニオンを合成し,特徴づけること.
  • メイングループおよび移行金属の機能不全リガンドとしての潜在能力を探求する.
  • 金属複合体との彼らの協調行動を調べるために.

主な方法:

  • N,N'-ダイアルキルカルボジミドとリチオオルトカルボランの反応.
  • カルボラニラミディネートリガンドを含む金属複合体の合成.
  • X線結晶学を用いた構造分析.

主要な成果:

  • カーボラニラミディネートアニオンが成功して合成されました.
  • これらのアニオンは,リチウム,亜鉛,およびクロムの新しい二機能リガンドとして作用します.
  • 予期せぬN,C調整モードが観察され,典型的なN,N'-ケレーションとは異なる.

結論:

  • カーボラニラミディネートアニオンは,ボロンに富んだリガンドの新しいクラスを表しています.
  • 彼らのユニークなN,C-調整は,リガンド設計の可能性を拡大します.
  • この発見は,特異な性質を持つ新しい有機金属化合物の道を開く.