機能化されたケトンのバイエル=ヴィリガー酸化における地域およびエナチオセレクティブ性に対する触媒制御
David K Romney1, Sean M Colvin, Scott J Miller
1Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520-8107, United States.
Journal of the American Chemical Society
|September 25, 2014
まとめ
新しいペプチド触媒は,サイクルケトンのベイヤー-ヴィリガー酸化を正確に制御します. この触媒的方法は,天然製品を含む複雑な分子を合成する選択性を高めます.
科学分野:
- 有機化学 オーガニック・ケミストリー
- カタリシス カタリシス カタリシス
- アシンメトリック・シンセシス
背景:
- Baeyer-Villiger (BV) 酸化は,エステルとラクトンを合成するための重要な変換である.
- 機能化されたサイクルケトンのBV酸化における地域およびエナチオセレクティビティの制御は,依然として課題です.
- ペプチドベースの触媒は,高度に選択的な化学変換の可能性を秘めています.
研究 の 目的:
- サイクルケトンの非対称なベイヤー-ヴィリガー酸化のためのペプチドベースの触媒を開発する.
- 地域およびエナチオ選択性に対する触媒の影響を調査する.
- 触媒プロセスにおける運動解像度の可能性を調査する.
主な方法:
- ペプチド触媒の設計と合成.
- アミド,尿素,または硫黄胺基を含むサイクルケトンのバイエル-ヴィリガー酸化に触媒を適用する.
- NMRやキラル染色学などの技術を用いて,反応産物の地域およびエナチオセレクティビティを決定するための反応産物の分析.
- 触媒と基板の間の水素結合相互作用を含むメカニズム研究.
主要な成果:
- ペプチド触媒は,バイエル=ヴィリガー酸化における地域選択性とエナチオ選択性の両方に強い影響を与えた.
- 触媒-基板-水素結合相互作用は,選択性の潜在的な源として特定されました.
- パラレルな運動解像度は特定のケースで観察され,BV製品の選択的形成を可能にしました.
- 非対称な酸化では,高いレベルのステレオ制御が達成されました.
結論:
- ペプチド触媒は,バイエル-ヴィリガー酸化のステレオ化学的結果を効果的に制御することができます.
- 開発された触媒システムは,複雑な分子の合成と多様化に幅広い有用性を示しています.
- このアプローチは,高い選択性を持つ天然製品を含む有価な化学実体にアクセスするための強力なツールを提供します.
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