光触媒によるフェノールの直接デオキシトリフルオロメトキシル化
Jingya Zhou1, Jia-Yi Li1, Chongjie Su1
1State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.
Journal of the American Chemical Society
|February 21, 2026
まとめ
研究者らは,フェノールのデオキシトリフルオロメトキシル化のための新しいフォトレドックス法を開発しました. この戦略は,有機フォトレドックス触媒を使用して,軽度な条件下でトリフローロメトキシ群を効率的に導入します.
科学分野:
- 有機化学 オーガニック・ケミストリー
- フォトケミストリー フォトケミストリー
- 合成方法論 合成方法論
背景:
- フェノールは,有機合成における汎用的な構成要素である.
- トライフルオロメトキシ (OCF3) 群を導入すると,分子特性が大幅に変化します.
- OCF3グループ導入のための効率的で選択的な方法は,非常に求められています.
研究 の 目的:
- フェノルのデオキシトリフローロメトキシル化のための新しいフォトレドックス戦略を開発する.
- OCF3グループのフェノール基板への軽度かつ選択的な導入を可能にするために.
主な方法:
- フォトレドックス触媒アプローチを用いた.
- OCF3アニオンを使用し,そのアニオンは,in situ反応のために二酸化素に分解されます.
- 軽度な反応条件のためのレバレッジされた有機フォトレドックス触媒.
主要な成果:
- フェノールのデオキシトリフルオロメトキシル化が達成された.
- 様々なフェノール基板に広く適用できることを実証しています.
- 複数のC-O債券の中で優れた選択性を示した.
- この方法は,簡単な手順で穏やかな条件下で動作します.
結論:
- 開発されたフォトレドックス戦略は,フェノールのデオキシトリフルオロメトキシル化への効率的な経路を提供します.
- この方法は,選択的に,穏やかな条件下でOCF3群を導入するための貴重なツールです.
関連する概念動画
01:10Hydrolysis of Chlorobenzene to Phenol: Dow Process
4.1K
Simple aryl halides do not react with nucleophiles under normal conditions. However, the reaction can proceed under drastic conditions involving high temperatures and high pressure to give the substituted products. For example, chlorobenzene is converted to phenol using aqueous sodium hydroxide at 350 °C under high pressure by the Dow process. The reaction follows an elimination-addition mechanism involving a benzyne intermediate. Here, the chloride ion is...
4.1K
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
13.1K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
13.1K
02:04Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
7.6K
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.
7.6K
01:27Benzene to Phenol via Cumene: Hock Process
4.3K
The synthesis of phenol from benzene via cumene and cumene hydroperoxide is called the Hock process. First, a Friedel–Crafts alkylation reaction of benzene with propene gives cumene. Then cumene forms cumene hydroperoxide via a radical chain reaction. In the chain initiation step, the benzylic hydrogen is abstracted to give a benzylic radical. In the chain propagation step, the benzylic radical reacts with an oxygen diradical to form a cumene hydroperoxide radical. The cumene...
4.3K
01:17Oxidation of Phenols to Quinones
4.9K
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...
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...
4.9K
01:14Aldehydes and Ketones to Alkenes: Wittig Reaction Mechanism
5.3K
The Wittig reaction, which converts aldehydes or ketones to alkenes using phosphorus ylides, proceeds through a nucleophilic addition‒elimination process.
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
5.3K