コバルト触媒マルコヴニコフ選択式無活性アルケンの水酸化
Benxiang Zhang1, Jiayan He1, Yi Li1
1Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
Journal of the American Chemical Society
|March 30, 2021
まとめ
新しいアシルフォスフォナート反応剤は,アルケンのコバルト触媒マルコフニコフ水酸化を可能にします. この反応は,穏やかな条件下で分岐ケトンを効率的に生成し,有機化学にとって貴重な合成ツールを提供します.
科学分野:
- 有機化学
- カタリシス
- 合成方法論
背景:
- アシルフォスフォナートは有機合成の多用途反応剤として登場しています.
- 炭素-炭素結合の形成に 有力な戦略を提示しています
- 活性化されていないアルケンを機能化するための効率的な方法の開発は,依然として重要な課題です.
研究 の 目的:
- ラジカルアシレーションのための新しいアシルフォスフォネート反応剤を開発する.
- 活性化されていないアルケンのマルコフニコフ水酸化のためのコバルト触媒プロトコルを確立する.
- 開発された方法論の範囲と限界を調査する.
主な方法:
- 5,5-ディメチル-1,3,2-ダイオキソフォスフィナニルアシルフォスフォナートの合成
- 軽度な条件下でアルケンのコバルト触媒反応.
- 標準的なスペクトル検査技術を用いた反応産物の特徴化.
主要な成果:
- 活性化されていないアルケンの効率的な分子間激素アシレーションが達成されました.
- 反応は温和な室温条件下で進行する.
- 幅広い基板範囲と優れた機能群耐性が見られた.
- 枝分かれしたケトンは満足のいく収穫量で得られた.
結論:
- 開発されたアシルフォスフォネートは,コバルト触媒によるマルコヴニコフ水酸化のための効率的な反応剤である.
- このプロトコルは 枝分かれしたケトンへの 穏やかで汎用的な経路を提供する.
- Co-H媒介による水素原子移転とラジカルトラッピングを含む妥当なメカニズムが提案されています.
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