陽子,H原子,および水素移転反応体としてのレニウム複合体におけるバイオインスピレーションによるディソリウム・リドックス・スイッチ
Shao-An Hua1, Lucas A Paul1, Manuel Oelschlegel1
1Universität Göttingen, Institut für Anorganische Chemie, Tammannstraße 4, D-37077 Göttingen, Germany.
Journal of the American Chemical Society
|April 16, 2021
まとめ
この研究では,二硫化物/ディチオール分子を含んだレニウム複合体を調査し,陽子結合電子移転 (PCET) の生物学的共因子を模倣した. 複合体は,陽子,水素原子,または水素イオンを放出する多用途のPCET反応性を示しています.
科学分野:
- 協調化学
- 電気化学
- バイオ有機化学
背景:
- 陽子結合電子移転 (PCET) は,生物学的および化学的反応において不可欠です.
- 合成PCET反応剤をインスパイアする天然のリドックス活性コファクターです.
- ディスルファイド/ディチオールカップルは,顕著な生物学的酸化還元システムである.
研究 の 目的:
- 合成レニウム複合体の陽子結合電子移転 (PCET) の反応性を調査する.
- ビピリジンリガンドにおける独特のSH··-S分子の役割を探求する.
- 生物学的リドックス活性共因子の機能を模倣する.
主な方法:
- レーニウム複合体の合成であるfac-[Re(S-Sbpy) ((CO) 3Cl).
- ディスルファイド結合をディチオラートに電気化学的に還元する.
- ディチオラート種のプロトン化およびその後の反応性の特徴.
主要な成果:
- レーニウム複合体は, -1.16 V 対 Fc +adj で 2 電子の還元を受け,ディチオラート種を形成する.
- ディチオラートのプロトネーションにより,S−H−S単位が形成され,p−K−aは24.7である.
- ディスルファイド/ディチオール系は,H+,H原子,またはH-を放出する多様なPCET反応性を示す.
結論:
- 合成レニウム複合体は 生物学的酸化還元因子を効果的に真似します
- ディスルファイド/ディチオール分子は,多用途の陽子結合電子伝送経路を可能にします.
- このシステムは,新しい合成PCET反応剤の開発のためのプラットフォームを提供します.
関連する概念動画
Preparation and Reactions of Thiols
7.0K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
7.0K
Redox Reactions
57.1K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
57.1K
Redox Reactions
418
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
418
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.6K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.6K
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
2.1K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
2.1K
Preparation and Reactions of Sulfides
5.3K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.3K


![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)