JoVE - Journal of Visualized Experiments
JoVE Visualize
Contact Us
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

マルチユニット挿入によるプラチナ触媒C-F結合再構築

  • 0Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China.
Journal of the American Chemical Society +

|

2025年6月30日

|

2025年6月30日

PubMedで要約を見る

まとめ

この要約は機械生成です。

研究者は遠隔C−F結合形成のための新しいプラチナ触媒方法を開発した. この戦略は,有機分子にフッ素原子を最大19の結合距離まで正確に配置するために,アルリックジェム・ディフッ化物とN-ヘテロサイクルを使用します.

科学分野

  • 有機化学
  • カタリシス
  • フッ素化学

背景

  • 有機合成におけるフッ素原子の位置を正確に制御することは大きな課題です.
  • 既存の方法では,リモート機能化ができないことが多い.

研究 の 目的

  • 遠隔C-F結合再構築のための新しい戦略を開発する.
  • 分子内でのフッ素の配送を 可能なようにする

主な方法

  • アリル基石二酸化物とNヘテロサイクルを用いたプラチナ触媒による多ユニット挿入.
  • 核愛性の挿入とリガンド交換を含むPt-Fシャトルメカニズムの調査.
  • 基質ステキオメトリーとメカニズム調査に関する体系的な研究.

主要な成果

  • フッ素の分子内伝達が成功し,約19の結合距離を超えた.
  • C−F結合形成における高い地域選択性と原子経済性.
  • 自由なフッ素ではなく,Pt-Fが選択的なC-F結合形成を媒介することを示す.

結論

  • カタリシスにおける長距離フッ素転送のためのプログラム可能なプラットフォームを確立しました.
  • 遠隔C-Fボンド編集の設計図を開発しました.
  • 分子設計,薬剤発見,フッ素ベースの材料に対する広範な意味を強調した.

関連する概念動画

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene 01:13

6.5K

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.

Unlike fluorine, iodine is highly unreactive for...

Halogenation of Alkenes 02:46

16.5K

Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.

A...

Nucleophilic Aromatic Substitution: Elimination–Addition 01:11

4.1K

Simple aryl halides do not react with nucleophiles. However, nucleophilic aromatic substitutions can be forced under certain conditions, such as high temperatures or strong bases. The mechanism of substitution under such conditions involves the highly unstable and reactive benzyne intermediate. Benzyne contains equivalent carbon centers at both ends of the triple bond, each of which is equally susceptible to nucleophilic attack. This 50–50 distribution of products is...

Electrophilic 1,2- and 1,4-Addition of X<sub>2</sub> to 1,3-Butadiene 01:14

2.8K

Electrophilic addition of halogens to alkenes proceeds via a cyclic halonium ion to form a 1,2-dihalide or a vicinal dihalide.

Conjugated dienes react with halogens in a similar manner. However, in addition to the 1,2-dihalide, they also form a 1,4-dihalide. The mechanism involves two steps.
First, a nucleophilic attack by one of the diene π bonds on the electrophilic center of the polarized halogen molecule forms a halonium ion intermediate. This is followed by a nucleophilic attack of...

Electrophilic Addition to Alkynes: Hydrohalogenation 02:35

10.3K

Electrophilic addition of hydrogen halides, HX (X = Cl, Br or I) to alkenes forms alkyl halides as per Markovnikov's rule, where the hydrogen gets added to the less substituted carbon of the double bond. Hydrohalogenation of alkynes takes place in a similar manner, with the first addition of HX forming a vinyl halide and the second giving a geminal dihalide.

Addition of HCl to an Alkyne
Mechanism I – Vinylic carbocation Intermediate
The mechanism begins with a proton transfer from HCl to the...

Base-Promoted α-Halogenation of Aldehydes and Ketones 00:51

3.7K

α-Halogenation of aldehydes and ketones is a reaction involving the substitution of α hydrogens with halogens in the presence of a base.  The reaction begins with the abstraction of  α hydrogen by the base to produce a nucleophilic enolate ion. This intermediate undergoes a subsequent nucleophilic substitution with the halogen to produce a monohalogenated carbonyl compound. If the starting substrate has more than one α hydrogen, it is difficult to stop the reaction...