関連する実験動画
Updated: Sep 9, 2025
05:07
Microwave-Assisted Preparation of 1-Aryl-1H-pyrazole-5-amines
Published on: June 23, 2019
6.8K
2-アミノフラン,フーロ[2,3-β]ピリジン,フーロ[2,3-d]ピリミジンを含む多成分アプローチ
Ekaterina S Uvarova1, Anton V Kutasevich1, Tatyana Yu Koldaeva1
1Department of Fine Organic Synthesis and Chemistry of Dyes, Mendeleev University of Chemical Technology, Miusskaya Sq., 9, Moscow 125047, Russian Federation. mityanovvs@yandex.ru.
Organic & biomolecular chemistry
|August 29, 2025
まとめ
新しい方法は,3つの成分反応を用いて,イミダゾール群と多様な2アミノフランを合成する. この効率的なプロセスはクロマトグラフィを回避し,温和な条件下でグラムスケールの製品を生成します.
科学分野:
- 有機化学
- 薬剤化学
背景:
- イミダゾール誘導体は医薬品化学における重要な基幹である.
- 代用された2アミノフランの効率的な合成は困難です.
研究 の 目的:
- イミダゾル代替の2アミノフランの 新しく効率的な合成経路を開発する.
- 合成された化合物の有用性を探求し,溶融ヘテロサイクルのシステムを構築する.
主な方法:
- イミダゾールN酸化物,アリルグリオキサール,および3-ケトニトリルを含む3つの成分凝縮反応.
- 軽度な反応条件下で行われたグラムスケール合成.
- 2アミノフランの後の機能化により,溶融ヘテロサイクルが生成される.
主要な成果:
- イミダゾール置換剤を含む多種多様な2アミノフランの合成に成功した.
- この方法は,グラムの量までスケーラブルで,コラムクロマトグラフィーを回避します.
- 合成された2-アミノフランをフーロ[2,3-b]ピリジンおよびフーロ[2,3-d]ピリミジンに変換した.
結論:
- イミダゾールを含む2アミノフランを合成するための多用途で効率的な方法が確立されています.
- 開発された経路は,価値あるヘテロサイクルの化合物にアクセスするための実用的なアプローチを提供します.
- 合成された中間物質は,複雑な溶融リングシステムへのさらなる精錬のための前駆体として機能する.
関連する概念動画
01:13Five-Membered Heterocyclic Aromatic Compounds: Overview
4.2K
Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
4.2K
01:25Basicity of Heterocyclic Aromatic Amines
6.3K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
6.3K
01:07Preparation 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
01:26Preparation 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
01:10Nomenclature of Aryl and Heterocyclic Amines
2.6K
The simplest aromatic amine is phenylamine, which contains an –NH2 functionality directly attached to an aromatic ring. The name aniline is designated for this skeleton. As shown in Figure 1, the common names of the functionalized anilines involve prefixes ortho-, meta-, and para- to indicate the substitution position. Different functionalized aniline derivatives also have notable trivial names.
2.6K
01:19Structure of Amines
2.7K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’...
2.7K