D型ビフェニルテンプレートベースのアレンジのリモートパラ-CH機能化
Sukdev Bag1, Tuhin Patra1, Atanu Modak1
1Department of Chemistry, Indian Institute of Technology Bombay , Powai, Mumbai 400076, India.
Journal of the American Chemical Society
|September 12, 2015
まとめ
研究者は,アレーンにおけるサイト選択性パラ-CH機能化のための新しいシリコンベースのテンプレートを開発した. パラオレフィネーションとアセトキシル化による複雑な分子の効率的な合成を可能にする.
科学分野:
- 有機化学
- 合成化学
- カタリシス
背景:
- サイト選択的なC-H機能化は,複雑な分子合成に不可欠である.
- 指揮グループ (DG) が支援する戦略は,通常,オーソとメタ選択性を達成します.
- パラセレクティブC-H機能化は,幾何学的な制約のために困難である.
研究 の 目的:
- アレナにおけるサイト選択型パラC-H機能化のための新しい戦略を開発する.
- 既存のグループ戦略の限界を克服する.
- ディスタルC−H結合の活性化により 複雑な分子の合成を可能にします
主な方法:
- 新しいリサイクル可能なSi含有バイフェニルベースのテンプレートの設計と合成.
- テンプレートを利用して,機能化を指示する D 型アセンブリを形成します.
- トゥルーエンの誘導体でパラオレフィネーションとアセトキシル化反応を行う.
主要な成果:
- D形のアセンブリは,ステリックと電子バイアスを克服し,過大型のプレトランジション状態の形成を容易にした.
- 効率的なパラ-C-H機能化が達成され,遠端C-H結合を選択的に標的とした.
- オーソとメタCHの活性化が抑制されました.
結論:
- 新しく設計されたグループ戦略により,前例のないサイトセレクティブのパラC-H機能化が可能になります.
- 開発されたSi含有ビフェニルテンプレートはリサイクル可能で多用途です.
- このアプローチは複雑な分子の合成に 強力な新しいツールを提供します
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