ノルセコクキュルビト[10]ウリルは同型アロステリズムを示している
Wei-Hao Huang1, Simin Liu, Peter Y Zavalij
1Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA.
Journal of the American Chemical Society
|November 16, 2006
まとめ
研究者らは,通常より小さなキュキュルビチューリルに含まれるゲストを結合できるnor-seco-cucurbit[10]uril (ns-CB[10]) を合成した. この新しいマクロサイクルは,イソメリズムとアロステリズムを含む複雑な選択性を示しています.
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
- ホスト・ゲスト・ケミストリー
背景:
- キュルビチューリル (CB) は,独特の腔構造とゲスト結合特性で知られているマクロサイクリック宿主です.
- CB[6]やCB[7]のようなより小さなキュキュルビチューリルは,特定のゲストを結合しますが,より大きなマクロサイクルは,より複雑な相互作用の可能性を提供します.
- ノルセコ・キュキュルビチューリルは,構造が改変したマクロサイクルの新種である.
研究 の 目的:
- ノル・セコ・キュキュルビット[10]ウリル (ns-CB[10]) マクロサイクルを合成し,特徴づけること.
- ns-CBのゲスト・バインディング能力[10]を様々な分析技術を用いて調査する.
- ns-CB[10]の選択性と複合性の行動を異なるゲストで探求する.
主な方法:
- 凝縮したHClで50°Cでグリコロリルとフォーマルデヒドの凝縮反応.
- 構造の解明のための核磁気共鳴 (1H NMR) スペクトロスコピー.
- 決定的な構造決定とゲスト複合分析のためのX線結晶学.
主要な成果:
- nor-seco-cucurbit[10]uril (ns-CB[10]) の合成が成功したことを確認しました.
- ns-CB[10]は,より小さなキュキュルビチューリル (CB[6],CB[7]) によって通常結合されるゲストをカプセル化する能力を示した.
- 複合性研究では,上/中部同体性,キラルゲストのダイアステレオ選択的結合,およびアロステリック効果を含む複数の選択性モードが明らかになりました.
結論:
- ノルセコクキュルビット[10]ウリル (ns-CB[10]) は,ユニークな二重腔構造を持つ新しいマクロサイクルである.
- ns-CB[10]は,ゲストの認識と結合を多用途に備えており,ゲストをその空洞内に収容しています.
- ns-CB[10]三元複合体における観察された選択性現象は,高度なホスト-ゲストシステムの設計のための新しい道を開く.
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