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Updated: Dec 25, 2025

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リガンド活性化された単選型β-C ((sp³) -H 自由カルボキシル酸のアクロキシル化

Zhe Zhuang¹, Alastair N Herron¹, Zhoulong Fan¹

¹Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, United States.

Journal of the American Chemical Society

|March 24, 2020

まとめ

研究者らは,炭酸に対する過酸化物を用いて新しいC-H活性化方法を開発した. この画期的な発見により選択的ラクトニゼーションとアセトキシル化が可能になり価値ある有機化合物を合成するための実践的なアプローチが提供されます

科学分野:

有機化学
カタリシス
合成方法論

背景:

低コストの酸化剤でC-H活性化反応を開発することは,有機合成における持続的な課題である.
弱調整グループによるC-H活性化反応における過酸化物の使用は,以前は報告されていなかった.

研究の目的:

自由カルボキシル酸の新しいC ((sp3) -Hアセトキシル化およびラクトニゼーション反応を報告する.
これらのC-H機能化反応を誘導するために,新しいサイクロペンタンベースのリガンドを使用する.
トートブチル過酸化水素を,実用的で安価な酸化剤として使用する.

主な方法:

サイクロペンタン基の新型ベータアミノ酸リガンドの開発
自由カルボキシル酸の触媒C-H活性化反応におけるリガンドの適用.
ベータ・アセトキシル化とガンマ・デルタ・エプシロン・ラクトニゼーションの唯一の酸化剤として,ターチ・ブチル過酸化水素を使用する.

主要な成果:

自由カルボキシル酸のC ((sp3) -Hβ-アセトキシル化とガンマ・デルタ・エプシロン・ラクトニゼーションが達成された.
2つのアルファメチル群の存在で独占的な単選性を示した.
アルファ水素を含むアリファチカルボキシル酸との互換性を示した.

結論:

炭酸のC−H機能化のための新しい効率的な方法を開発しました.
このプロトコルは,自由酸の直接的乳酸化の最初の例を表しています.
この方法は,高い選択性および実用的な酸化剤の使用を含む重要な利点を提供します.

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