DFT ブラジリアン型構造の欠落部分の研究 バイオシンセシス:異常な骨格の再編成
Hajime Sato1,2,3, Takahiro Hashishin2, Junichiro Kanazawa2
1Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.
Journal of the American Chemical Society
|October 30, 2020
まとめ
研究者らは,ブラジリアン型セスクイターペンの新生合成経路を提案している. 密度関数理論の計算は,以前の提案とは異なるカルボケーションカスケードメカニズムを示唆している.
科学分野:
- 生物化学
- 有機化学
- コンピュータ化学
背景:
- ブラジラン型セスキートルペンは,知られている自然製品のクラスです.
- 生物合成の経路とメカニズムは ほとんど解明されていない.
- 最近の研究では,トリコブラシレノール,ブラジラン型セスクイテルペンを生成するテルペンサイクラスを特定しました.
研究 の 目的:
- トリコブラシレノールの生物合成経路を調査し解明する.
- ブラジリアン型セスクイターペンの生体合成のための既存の提案されたメカニズムに挑戦し,改良する.
- トリコブラシレノール形成のための新しい,計算的にサポートされたメカニズムを提案する.
主な方法:
- 反応メカニズムを分析するために,密度関数理論 (DFT) の計算を使用した.
- 以前の研究からの同位体ラベリングの実験と副産物の分析を考慮した.
- 提案されたメカニズムとテルペノイド生物合成に関する既知の知識の比較
主要な成果:
- DFTの計算は,複雑な再編成を含む,以前に提案された協調反応メカニズムと矛盾していた.
- 多段階のカルボケーションカスケードを含む新しい経路が提案された.
- 提案されたメカニズムは,サイクロプロピルカルビニルとホモアリルカチオンの重要な役割を強調しています.
結論:
- 新しいカルボケーションカスケードメカニズムは,トリコブラシレノール生物合成のより妥当な説明を提供します.
- このメカニズムは,同位体ラベルと副産物の分析から得られた既存のデータとよく一致しています.
- この発見は,ブラジラン型セスクイターペンの生物合成のより深い理解に貢献する.
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