ブロモエテネスルフォニルフッ化物の1,2,3-トリアゾール合成におけるマイクロドロップレットにおけるオン・ウォーター選択性スイッチ
Dmitry B Eremin1, Valery V Fokin1
1The Bridge@USC, University of Southern California, 1002 Childs Way, Los Angeles, California 90089-3502, United States.
Journal of the American Chemical Society
|October 4, 2021
まとめ
ダブルスプレーの方法で水マイクロドロップで有機反応を行うと,化学的選択性が変化する. この"水上の"アプローチは,従来の有機溶媒では見られないユニークな反応経路を可能にします.
科学分野:
- 有機化学
- 物理化学
- 化学工学
背景:
- 水は有機反応速度と選択性に大きく影響する.
- "水上"の反応を行うことは,化学反応性を制御する機会を提供します.
- ネブライザーの羽根で生成されたマイクロドロップレット環境は,ユニークな反応条件を提供します.
研究 の 目的:
- トリアゾール形成における化学選択性の"オン・ウォーター"スイッチを調査する.
- 反応結果に対する水/有機界面の影響を調査する.
- 二相条件下での反応効率を最適化する.
主な方法:
- 反応のための水マイクロドロップレットを生成するために二重スプレーネブライザーを使用します.
- 水の微小粒子のトリアゾール形成経路と有機溶剤の比較
- pHの変動とデウテリウム酸化物 (D2O) が反応結果に及ぼす影響を調査する.
主要な成果:
- ダブルスプレーの"水上"環境は,トリアゾリン中間産物からH-SO2Fの除去を容易にする.
- 対照的に,有機溶剤での反応は,HBrの除去のみを生成する.
- 水と有機界面の相互作用は,反応効率に決定的であることが判明した.
結論:
- 水のマイクロドロップルのユニークなマイクロ環境は,有機反応における化学選択性を制御することができます.
- ダブルスプレーによるネブライゼーションは,選択性が変化した"水上"合成のための効果的な方法を提供します.
- インターフェース現象は"水上"反応の最適化において重要な役割を果たします.
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