水素過酸化による非対称的なα-水酸化のためのキラル・プライマリ・アミン/ケトン協同触媒
1School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of the American Chemical Society
|January 5, 2021
まとめ
この研究は,非対称的なアルファ・ヒドロキシル化のためにプライマリアミンとケトンを用いた新しい協力型二重触媒を導入する. このアプローチは,水素過酸化物を用いてβ-ケトカルボニルの効率的でエナント選択的な水酸化を可能にします.
科学分野:
- 器官触媒
- 非対称な触媒
- 酸化反応
背景:
- アミンとカルボニルは有機触媒の鍵ですが,通常は互いに無効化します.
- 協力的なアミン/カルボニル二重触媒はほとんど研究されていない.
- ベータ・ケトカルボニルの非対称性アルファ-水酸化は,難しい変換です.
研究 の 目的:
- 主要なアミンとケトンの二重触媒システムを開発する
- 水素過酸化物を用いてβ-ケトカルボニルの非対称性アルファ-水酸化物を達成する.
- アミンとカルボニル触媒の範囲を拡大する.
主な方法:
- キラルなプライマリアミンとケトンをコカタリズムとして利用した.
- 酸化剤として過酸化水素を使用した.
- ケチミンの経由でオクサジリジン中間物質の形成を調査した.
主要な成果:
- ベータ・ケトカルボニルの高度に制御された非対称アルファ- 水酸化が達成された.
- 優れた収穫量とエナチオ選択性を得ました
- 高いステレオ選択性を持つペプチジルアミドとキラルエステルの後期ヒドロキシル化が成功していることが示されています.
結論:
- 新しいアミン/ケトン二重触媒戦略を確立した.
- 水素過酸化物の触媒活性化のための効率的な方法を開発した.
- 水酸化反応に挑むためにアミンとカルボニル触媒の有用性を拡張した.
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