ステリックと水素結合制御 ステレオ化学とBINOLベースのアセンブリにおける自己分類
You-Quan Zou1, Dawei Zhang1, Tanya K Ronson1
1Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, United Kingdom.
Journal of the American Chemical Society
|June 14, 2021
まとめ
BINOLベースのダイアルデヒドの水素結合は,特定のヘリケート構造に自己組み立てを制御する. メチル化により自己分類行動が変化し,軸性キラリティは金属の中央のハンド性を決定し,新しいステレオ化学的に純粋なヘリケートを可能にします.
科学分野:
- 超分子化学
- 有機合成
- 協調化学
背景:
- チラル・ビノール誘導体は,超分子化学における貴重な構成要素である.
- 自己組織化におけるステレオ化学の制御は 機能的な分子構造の構築に不可欠です
- 複雑な多要素システムを設計する上で 自己分類行動を理解することが重要です
研究 の 目的:
- BINOLベースのダイアルデヒドの水素結合能力とメチル化が自己組み立て結果にどのように影響するか調査する.
- 線形リガンドによる自己分類行動に対するこれらの改変の影響を調査する.
- チラリティとアセンブリを制御することによって,新しいステレオ化学的に純粋なヘテロレプティックヘリケートを準備する.
主な方法:
- ビノール基の二アルデヒド分子の合成 メチル群となし
- 金属イオン (FeII,ZnII) の存在による自己組み立て試験
- NMRスペクトロスコーピーや質量スペクトロメトリーなどの技術を用いた自己分類行動の分析.
主要な成果:
- ダイアルデヒドの自由ヒドロキシ群は1つのダイアステロエーマーヘリケート形態を促進し,メチル化は別の形へと導きます.
- 線形ダイアルデヒドと混ぜると 自己分類をナルシシストから統合に切り替える
- BINOLユニットの軸性キラリティは,一貫してヘリケートメタルセンターハンドル性を決定します.
- 新しいステレオ化学的に純粋なヘテロレプティックヘリケートが成功して合成されました.
- 金属イオン (FeIIからZnII) を切り替えるか,より長い線形リガンドを使用すると,ヘテロレプティックヘリケート形成が好まれる.
結論:
- 水素結合とメチル化は,BINOLベースのシステムにおけるステレオ化学と自己分類を制御する重要な要因である.
- 軸性キラリティの移転は,ステレオ特異的自己組み立ての際に強固な特徴です.
- この発見は,新しいステレオ化学的に純粋なヘテロレプティックヘリケートの合理的な設計と合成を可能にします.
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