ステレオ定義四次中心の合成構成要素としてのアリンとサイクルアルキン
Elias Picazo1, Sarah M Anthony1, Maude Giroud1
1Department of Chemistry and Biochemistry , University of California , Los Angeles , California 90095 , United States.
Journal of the American Chemical Society
|May 3, 2018
まとめ
この研究は,ストレートされた中間物質とβ-ケトースターを使用してステレオ定義された四次中心を作り出すための新しい方法を導入しています. このプロセスはキラルエナミンを効率的に生成し,高度にエナチオ濃縮されたアリラートまたはアルケニラート製品につながります.
科学分野:
- 有機化学
- アシンメトリック・シンセシス
- 反応方法論
背景:
- 四次性炭素は医薬品や天然製品に多く含まれている.
- 四次中心のステレオ選択合成は,有機化学における重要な課題である.
- β-ケトエステルアリレーション/アルケニレーションの既存の方法は,しばしばステレオ制御が欠けている.
研究 の 目的:
- β-ケトエステル由来基質から四次中心を合成するための容易でステレオ選択的な方法を開発する.
- 非対称な変換におけるアリンと関連したストレインされた中間物質の使用を調査する.
- β-ケトースターのエナンチオセレクティブアリレーション/アルケニル化のための溶液を提供する.
主な方法:
- β-ケトースターのキラルエナミンへの変換
- キラルエナミンの局所生成のストレートアリンまたはサイクルアルキンの反応.
- アリル化またはアルケニル化製品を得るための水解処理.
- チラリティ移転のメカニズムを解明するための計算研究.
主要な成果:
- 高いエナチオ選択性 (最大96% ee) を有するステレオ定義四次中心の合成に成功した.
- β-ケトースターのエナンチオセレクティブ α-アリレーションのための1ポット手順の実証.
- チラリティの移転源としてのN結合キラル補助物質の識別
- ステレオセンター生成のためのキラルヌクレオフィルによるアリン捕獲の最初の理論的調査.
結論:
- 開発された方法は,有価なアリア化およびアルケニル化化合物への効率的でステレオ選択的な経路を提供します.
- この研究は,四次性ステレオセンターを含む複雑な有機分子の合成における重要なギャップに対処しています.
- この発見は,非対称なアリン化学とキラル補助制御反応に関する根本的な洞察を提供します.
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