アルコールからアルケニル基のチタン媒介移転による二次アミンの合成
Balasubramanian Ramanathan1, Aaron L Odom
1Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
Journal of the American Chemical Society
|July 20, 2006
まとめ
チタンアミド複合体は,アルコールからアミンへの選択的アリル転移を促進し,提案されたサイクル添加機構を通じて二次アリルアミンを形成します. この方法により,ホモアリルアルコールから複雑なスパイロサイクリックアミンの合成も可能になります.
科学分野:
- 有機金属化学 有機金属化学
- 合成有機化学 合成有機化学について
- カタリシス カタリシス カタリシス
背景:
- チタンアミドは,有機合成における多用途の反応剤である.
- アリル転移反応は,炭素-炭素および炭素-ヘテロ原子結合の形成に不可欠である.
- 選択的で効率的な合成方法論の開発は,化学の重要な目標です.
研究 の 目的:
- タイタニウムテトラキス (((ジメチラミド)) (Ti (((NMe2) 4) のアルリルアルコールおよび原始アミンとの反応を調査する.
- アリル転移とアリル転置のメカニズムを探求する.
- 複雑な分子合成のためのホモアリルアルコールを用いてこの方法の適用を検証する.
主な方法:
- Ti(NMe2) 4が様々なアルリルアルコールと一次アミンと反応する.
- 選択性とステレオ化学を決定するために反応産物の分析.
- 反応経路を明らかにするために置換効果を含むメカニズム研究.
- ホモアリルアルコールとの反応の研究.
主要な成果:
- アルコールからアミンへのアルリル移転により,二次アルリルアミンの選択的形成.
- 移転過程中の選択性アリル転置の観察.
- 置換効果に基づく [2 + 2]/レトロ- [2 + 2]-サイクル添加メカニズムの定理.
- ホモアリルアルコールを用いた1-アザ-スピロ[5.5]アンデカンの合成に成功.
結論:
- Ti(NMe2) 4は,選択的にアリルをアミンに変換する有効な反応剤です.
- 反応は,提案されたサイクロアディションメカニズムを経由して進行し,アリル転移を証明する.
- この方法論は,複雑なスパイロサイクルの構造を合成するために,ホモアリルアルコールに拡張することができます.
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