アリルハリドのアミダ化のための一般的で効率的な銅触媒
Artis Klapars1, Xiaohua Huang, Stephen L Buchwald
1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Journal of the American Chemical Society
|June 20, 2002
まとめ
この研究では,アリルハリドアミデーションのためのシンプルで費用対効果の高い銅触媒を紹介しています. この新しい方法は,アリルハリドをアミンと効率的に結合させ,多様な機能群を許容します.
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
- 合成方法論 合成方法論
背景:
- アリルハリドのアミダ化は,有機合成における重要な変換である.
- パラジウム触媒アミネーションなどの既存の方法は,しばしば高価な触媒を必要とし,機能群の許容性に苦労します.
研究 の 目的:
- アリルハライドのアミダ化のための実験的にシンプルで安価な触媒システムを開発する.
- 開発された触媒システムの範囲と限界を探求する.
主な方法:
- 銅の源として使用された銅 (I) ヨウ化物 (CuI).
- N,N'-ジメチルエチレンジアミンおよびトランス-N,N'-ジメチル-1,2-サイクロヘキサンジアミンを含む1,2-ダイアミンリガンドが使用されています.
- 塩基として,使用済みのリン酸カリウム (K) 3PO4),炭酸カリウム (K) 2CO3),または炭酸セシウム (Cs) 2CO3を使用しています.
主要な成果:
- 低触媒負荷 (0.2−10 mol % CuI) を使って,アリルヨウ酸化物,ブロミド,および塩化物の効率的なアミダ化を達成した.
- N,N'-ジメチルエチレンジアミンとトランス-N,N'-ジメチル-1,2-サイクロヘキサンジアミンを高度に活性なリガンドとして特定しました.
- 幅広い機能群耐性を実証し,パラジウム触媒法と互換性のないグループに対応しています.
結論:
- 開発された銅触媒システムは,アリルハリドアミデーションの実用的かつ経済的代替案を提供します.
- この方法論は,機能群の互換性を改善したアミド結合の構築のための合成ツールボックスを拡張します.
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