一つのテンプレートサイトを使用して2つの軸をスレッド:アクティブメタルテンプレートマクロビサイクル [3]ロタキサン
Stephen M Goldup1, David A Leigh, Paul R McGonigal
1School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, United Kingdom.
Journal of the American Chemical Society
|December 9, 2009
まとめ
研究者らは,単一の金属テンプレートサイトを使用して,[3]ロタキサンのための新しいワンポット合成を開発しました. この方法は,機械的結合による複雑な分子構造を効率的に作成し,ロタキサン構造を簡素化します.
科学分野:
- 超分子化学 超分子化学
- オーガニック・シンセシス オーガニック・シンセシス
- マテリアルサイエンス 材料科学
背景:
- 伝統的なロタキサン合成には,部品を相互接続するための複数のテンプレートサイトが必要です.
- 複雑なロタキサンを構成するための効率的な方法の開発は,高度な分子機械にとって極めて重要です.
研究 の 目的:
- 単一の金属テンプレートサイトを使用した[3]ロタキサンの新型ワンポット合成を提示する.
- 金属テンプレートコヴァレンント結合形成を通じた自転車マクロサイクル内の機械的結合の形成を実証する.
主な方法:
- 移行金属イオンを結合する結合部分を持つバイサイクル分子を使用します.
- 金属イオンを利用して,マクロサイクルの穴を通って,コヴァレンント結合形成 (例えば,Cu(I) 触媒化されたアジド-アルキンサイクロアディション) をテンプレート化します.
- 連続または二重金属触媒反応により,同一または異なるコンポーネントを持つ軸を組み立てる.
主要な成果:
- Cu(I) 触媒を用いて最大86%の収量で2つの同じ軸を持つ[3]ロタキサンのワンポット合成を達成した.
- 2つの異なる軸を持つ[3]ロタキサンを,連続的なCu(I) カタリシスまたは二重金属カタリシス (Pd(II) とCu(I)) を使って合成した.
結論:
- 単一の金属模板部位は,ロタキサンにおける複数の機械結合の形成を効果的に制御することができます.
- この戦略は,調整可能な軸組成を持つ複雑な [3] ロタキサンを合成するための多用途かつ効率的なアプローチを提供します.
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