黄金のリガンド活性化フッ素化 (I) と黄金における光誘導アリル-F結合 (III)
David Vesseur1, Shuo Li1, Sonia Mallet-Ladeira2
1Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069) , CNRS/Université Paul Sabatier , 118 Route de Narbonne, 31062 Toulouse, Cedex 09, France.
Journal of the American Chemical Society
|April 12, 2024
まとめ
金 ((I) 複合体は,化剤と反応して新しい金 ((III) フッ化物複合体を形成する. 光照射は,還元性除去によってアリル-F結合形成を効率的に促進し,金触媒による化反応を進める.
科学分野:
- 有機金属化学
- カタリシス
- 化化学
背景:
- フッ素を有機分子に導入するには,電化フッ素反応剤が不可欠です.
- 金の触媒は様々な有機変異に ユニークな反応経路を提供します
- 金媒介によるフッ素化の仕組みを理解することは,新しい合成方法の開発に不可欠です.
研究 の 目的:
- MeDalphosで安定したGold (I) コンプレックスと電離性フッ化剤の反応性を調査する.
- 結果として生じる黄金 (III) フッ化物中間物質の特徴と構造の解明.
- これらの中間物質のC-CクロスカップリングとC-F結合形成の可能性を調査する.
主な方法:
- MeDalphos Au (I) とその後の Gold (III) フッ素複合体の合成と分離.
- 多核性NMRスペクトロスコーピーとX線微分を用いた特徴付け.
- 密度関数理論 (DFT) と内在結合軌道 (IBO) 解析を用いた計算研究.
- C-Cクロスカップリング反応と光誘導による還元性除去の調査.
主要な成果:
- MeDalphos Au ((I) 複合物は,電化フッ素反応剤と反応して, [ ((MeDalphos) Au ((R) F)) +複合物を生成する.
- これらの複合体は,DFT/IBO計算により,F+転送におけるMeDalphosリガンドの役割を明らかにする,正方形平面的,反熱力学的構造を採用する.
- 金 (III) フッ化物複合体は,C-C交配反応を行い,光誘導による高収率の還元性除去によって直接C-F結合を形成する.
結論:
- この研究は,ゴールド (III) フッ素複合体の合成と特徴づけのための新しい経路を示しています.
- 光誘導による還元性除去による直接的なC−F結合形成は,アリル化のための穏やかで効率的な方法を提供します.
- これらの発見は,金触媒による化メカニズムに関する貴重な洞察を提供し,オルガンゴールド化学の範囲を広げています.
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