カーベンの二重性の解明は,可逆的なアンモニア活性化の発見につながった

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Jonathan P Moerdyk¹, Garrett A Blake, Daniel T Chase

¹Department of Chemistry and Biochemistry, The University of Texas at Austin , Austin, Texas 78712, United States.

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|December 6, 2013

まとめ

研究者らは,新しいアンビフィリックなプロセスを通して様々なアミンを活性化するN,N'-ダイアミドカルベン (DAC) を発見した. この分離可能なカルベンは,電愛体と核愛体の両方として作用し,このような化合物にとって初めてのものです.

科学分野:

有機化学オーガニック・ケミストリー
有機金属化学有機金属化学

背景:

カーベンは,有機合成において極めて重要な高度反応性の中間物質である.
隔離可能なカルベンは,合成アプリケーションの安定性と処理性を向上させます.
カルベンの反応性,すなわち電友性および核友性行動を理解することは,新しい合成方法論の開発の鍵となる.

研究の目的:

主要および二次アミンとのN,N'-ダイアミドカルベン (DAC) の反応性を調査する.
異なるアミン型に対するDAC活性化のメカニズムを決定する.
DACのアンビフィリック反応剤としての可能性を調査し,関連するカルベンと比較する.

主な方法:

N,N'-ダイアミドカルベン (DAC) の合成と分離.
DACの反応は,多種多様な一次および二次アリファ酸およびアロマ酸アミンの反応である.
アミン挿入に対する相対的な反応速度を決定するための運動学的研究.
同様のダイアミノカルベンの比較研究.

主要な成果:

N,N'-ダイアミドカルベン (DAC) は,主および二次アミンの広範な活性化を示した.
DACは,プライマリアミンで電友性,二次アリルアミンで核友性を示した.
これは,分離可能なカルベノールに対する最初の報告されたアンビフィリックプロセスを表しています.
類似したダイアミノカルベンは,核愛者としてのみ作用した.
ダイアミノカルベンは,可逆的なアンモニア活性化を行うことができる最初の有機反応剤として特定されました.

結論:

N,N'-ダイアミドカルベン (DAC) は,多用途のアンビフィリック反応剤であり,双重の電愛性および核愛性反応性を示しています.
DACのアンビフィリシティの発見は,分離可能なカルベンの既知の反応パターンを拡張します.
リバーシブルなアンモニア活性化剤の開発は,窒素化学の新たな道を開く.

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