メイゼンハイマー複合化におけるダイメチルシルフィニルアニオンのデント性について
Erwin Buncel1, Kuk-Tae Park, Julian M Dust
1Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6. buncele@chem.queensu.ca
Journal of the American Chemical Society
|May 2, 2003
まとめ
ディメチルスルフィニルカルバニオン (dimsyl) は,1,3,5-トリニトロベンゼン (TNB) に対してユニークなO-,S-,およびC-核愛反応性を表しています. 3つの新しいアダクトが特定され,ダイムシルに対する明確な動力学的および熱力学的好みを明らかにしました.
科学分野:
- 有機化学 オーガニック・ケミストリー
- 核愛性反応性 核愛性反応性とは
- スペクトル顕微鏡検査です.
背景:
- カーバニオンの反応性は,有機合成において極めて重要です.
- ディメチルスルフィニルカルバニオン (dimsyl) は,その核愛性特性で知られている.
- 1,3,5-トリニトロベンゼン (TNB) は,核性芳香的置換を研究するための一般的な基板です.
研究 の 目的:
- dimsyl.のデンティシティ (O,S,C核愛反応性) を調査する.
- ディミシルとTNB.の間で形成されたアダクトの特徴を記述する.
- ディムシルの反応パターンを他のヌクレオフィルと比較する.
主な方法:
- 核磁共振 (NMR) スペクトロスコピーは,反応を研究するために使用されました.
- アドクトの構造は,スペクトロスコピーのデータに基づいて割り当てられました.
- 動力学的および熱力学的好みを分析した.
主要な成果:
- TNBを持つ3つの新しいディミシルアダクトが初めて観察されました:O-アダクト15,S-アダクト16,C-アダクト17.
- アダクト形成の動的好みは15 > 16 > 17であることが判明しました.
- 熱力学的好みは17 > 16 > 15と決定されました.
結論:
- ディムシルは,酸素,硫黄,炭素を介して反応するユニークな三核性特性を示しています.
- ディミシルの観察された反応パターンは,エノラートアニオンとジメチル硫酸化物と異なる.
- ディムシルは,隣接する3つの原子が共性結合形成に参加できるユニークなシステムを表しています.
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