モリブデン塩化物がZ選択オレフィンメタテシス反応のための触媒
Ming Joo Koh1, Thach T Nguyen1, Jonathan K Lam2
1Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA.
Nature
|January 24, 2017
まとめ
モリブデン触媒はオレフィン転化において高いステレオ選択性を達成し,貴重なトリフローロメチルアルケーンおよび関連化合物を合成する. これらの触媒は,挑戦的なクロスメタテシス反応の効率と選択性を改善します.
科学分野:
- カタリシス
- 有機化学
- ステレオ選択合成
背景:
- オレフィン転移はC=C結合形成の強力なツールである.
- 触媒の設計は反応性とステレオ選択性を制御するために不可欠です.
- モリブデン,ボルンガム,ルテニウム複合体はメタテシスを進めている.
研究 の 目的:
- 立体選択性オレフィン転移のための新しいモリブデン触媒を開発する.
- 高エネルギー (Z) -アルケンの同位体,特にトリフローロメチル置換物を合成する.
- 挑戦的な基板との交差メタテシス反応の効率と選択性を向上させる.
主な方法:
- モリブデンモノアリロキシド塩化物の合成と応用
- Z-1,1,4,4,4-ヘクサフッロロ-2-ブーテンによる交差転移反応
- Z-1,2-dichloroetheneと1,2-dibromoetheneを含む変換について
- 機械的洞察のための密度関数理論 (DFT) の計算.
主要な成果:
- モリブデンモノアリロキシド塩化物の触媒は,トリフローロメチル置換アルケンの (Z) 異体を生成する.
- ダイハロエテンのメタテシスで観察された効率とZ選択性の向上.
- 生物学的に重要な分子とトリフローロメチル類の合成に成功した.
- DFTの計算は,観察された活動と選択性の起源を明らかにした.
結論:
- モリブデンモノアリロキシド塩化物複合体は,ステレオ選択的オレフィン転移に非常に有効である.
- これらの触媒は,以前に合成が困難だった有価な (Z) -アルケンの同位体へのアクセスを可能にします.
- この発見はオレフィン転化における既存の原理に挑戦し,新しい合成戦略を提供している.
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