関連する実験動画

Updated: Sep 10, 2025

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

バイオインスピレーションによるC−H水酸化反応の最近の進歩

Sunipa Goswami¹, Isaac Garcia-Bosch¹

¹Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.

Accounts of chemical research

|August 27, 2025

まとめ

水素過酸化物 (H2O2) を用いた銅誘導型水酸化反応は,有機分子の部位選択的酸化を可能にします. 機械的洞察は,複雑なC−H結合の機能化のための改善された,よりグリーンな触媒システムの開発を導いた.

科学分野:

バイオ有機化学
有機合成
カタリシス

背景:

銅に依存する金属酵素は,C-H水酸化を含む酸化変換のためにO2またはH2O2を使用する.
リン酸ポリサッカリド単酸化酵素 (Lytic polysaccharide monooxygenase enzymes,LPMOs) は,ポリサッカリドを水酸化する銅酵素であり,潜在的にH2O2を使用する.
以前の研究では,Cu/H2O2系は強いC-H結合を水酸化することができるが,しばしば根幹形成により選択性が欠けていることが示された.

研究の目的:

Cu方向のC−H水酸化反応のメカニズムを調査する.
銅の触媒と緑の酸化物質を用いた地域選択的およびエナチオ選択的水酸化方法の開発.
合成用途のメタロ酵素活性部位のメカニズムを模倣し理解する.

主な方法:

シュネッカーのC−H水酸化に関する研究を含むCu/O2およびCu/H2O2反応のメカニズム分析.
選択的水酸化のための銅,指向群,H2O2を使用する触媒システムの開発.
これらのシステムをケトン,アルデヒド,ベンゾフェノンを含む様々な基質に適用する.

主要な成果:

Cu/O2反応はCu (II) とH2O2を生成し,Cu (II) -ヒドロペロキシドの単核化物質を生成するが,Cu (II) -ヒドロペロキシドの二核化物質を生成しない.
Cu (II) /H2O2を使用した再設計された反応は,収量,コスト,および実用性を改善しました.
sp2 C-H 結合のγ-水酸化,sp3 C-H 結合のβ-水酸化,およびエナンチオセレクティブのC-H 水酸化を含むように基板の範囲を拡大した.

結論:

酸化プロセスを最適化するには,機械的な理解が不可欠です.
銅誘導変換は,サイト選択的およびエナチオ選択的C-H水酸化のための強力な戦略を提供します.
これらの合成方法は,有機分子機能化のためのメタロ酵素機構の洞察を提供します.

さらに関連する動画

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions

Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions

Published on: November 30, 2022

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

関連する概念動画

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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...

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...