金属で触媒化された分子間 [5+2] サイクロアディション/ナザロフサイクロゼーション配列とカスケード配列.
Paul A Wender1, René T Stemmler, Lauren E Sirois
1Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA. wenderp@stanford.edu
Journal of the American Chemical Society
|February 10, 2010
まとめ
研究者らは,ヴィニルサイクロプロパン (VCP) とエニノンの新しい金属触媒 [5+2] サイクロアディションを開発した. この効率的なプロセスは,結合サイクロアディションとナザロフサイクライゼーション反応を通じて,ビサイクロ[5.3.0]デカンの骨格への容易なアクセスを提供します.
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:
- バイサイクロ[5.3.0]デカンの骨格は,天然製品や生物学的活性分子における一般的な構造モチーフです.
- このコア・スキャフォールドへの効率的な合成経路は,薬剤の発見と開発に不可欠です.
研究 の 目的:
- ヴィニルサイクロプロパン (VCP) とエニノンの間の最初の金属触媒化 [5+2] サイクル添加反応を報告する.
- Bicyclo[5.3.0]デカン骨格へのアクセスのための効率的な1フラスク連続反応と触媒カスケードの開発.
主な方法:
- 金属触媒 [5+2] バイニルサイクロプロパン (VCPs) をエニノンでサイクル添加する.
- その後,形成されたダイオノンのサイクロードダクトのナザロフサイクリング.
- シングルオペレーション [5+2]/ナザロフ連続反応と,単一の触媒を用いた触媒カスケードの開発.
主要な成果:
- VCPとエニノンからダイオンのサイクルロードダクトの効率的な形成.
- 後のナザロフサイクライゼーションでこれらのアダクトを成功裏に適用する.
- 一フラック [5+2]/ナザロフ連鎖反応の実証,効率の向上 (反応時間の短縮,同等またはより高い収量).
- 両方の変換を媒介できる単一の触媒の特定.
結論:
- 開発された [5+2]/ナザロフ反応配列は,ビサイクロ[5.3.0]デカンの骨格のための新しい,簡単な合成戦略を提供します.
- この方法論は,シンプルで容易に入手可能な出発材料から貴重な脚すまでアクセスを提供します.
- 一瓶のアプローチは,合成効率と原子経済を高めます.
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