低塩素鉄 (III) ポルフィリン複合体の合成,特徴化,および反応性
Zhiqi Cong1, Sachiko Yanagisawa, Takuya Kurahashi
1Institute for Molecular Science and Okazaki Institute for Integrative Bioscience, National Institutes of Natural Sciences, Myodaiji, Okazaki 444-8787, Japan.
Journal of the American Chemical Society
|December 11, 2012
まとめ
ヒポクロライトリガンドを含む鉄 (III) ポルフィリン複合体を合成し,特徴づけました. これらの新種の化合物は,塩素化,硫化,エポキシ化において反応性を発揮し,ある複合体は他の複合体よりも有意に活性であることが示されています.
科学分野:
- バイオ・オーガニック化学 バイオ・オーガニック化学
- 有機金属化学 有機金属化学
- カタリシス カタリシス カタリシス
背景:
- 低塩素鉄 (III) ポルフィリン種は,中性粒子の抗微生物防御やヘム触媒による塩素化などの生物学的システムにおける重要な中間物質として関与しています.
- これらの中間物質の構造と反応性を理解することは,反応機構を明らかにし,新しい触媒システムを開発するために不可欠です.
研究 の 目的:
- 新規のビス (((ヒポクロリト) 鉄 (((III)) ポルフィリンおよびイミダゾール-ヒポクロリト鉄複合体を調製し,スペクトロスコープで特徴づけること.
- 塩素化,硫化,エポキシ化を含む様々な有機変異におけるこれらの複合体の反応性を調査する.
- 異なる亜塩素鉄 (III) ポルフィリン種の反応性を比較する.
主な方法:
- ビス (((ヒポクロリト) 鉄 (((III) ポルフィリン (((TPFP) Fe (((III) (((OCl) (((2))) とイミダゾール-ヒポクロリト鉄複合体 (TPFP) Fe (((III) (((OCl)) ((1-R-Im)) の合成.
- 吸収,2Hと19FのNMR,EPR,共振ラーマン光譜,低温の電圧噴射イオン化質量スペクトロメトリを用いたスペクトロスコピの特徴付け.
- 塩素化,硫化化,エポキシ化能力を評価するために,様々な有機基板を用いた反応性研究.
主要な成果:
- ヒポクロライトリガンドを含む4つの新しい鉄 (III) ポーフィリン複合体の製造と構造確認に成功しました.
- 合成された複合体の,塩素化,硫化,エポキシ化反応を触媒化する能力が実証されている.
- ビス・ヒポクロリト・鉄・III・ポルフィリン複合体 (1) は,イミダゾール・ヒポクロリト・鉄複合体 (2-4) に比べて,著しく高い反応性を示した.
結論:
- この研究は,新型の低塩素鉄 (III) ポルフィリン複合体の有力な特徴づけを提供します.
- これらの複合体は,重要な酸化変換の効果的な触媒として機能し,合成化学におけるその可能性を強調しています.
- この発見は,鉄・ポルフィリン媒介の酸化機構と塩化物種の役割の理解に寄与する.
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