連続した炭化水素機能化:アリルC-H酸化/ビニルC-Hアリレーション
Jared H Delcamp1, M Christina White
1Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
Journal of the American Chemical Society
|November 23, 2006
まとめ
この研究は,単純なオレフィンからアリレイテッドアリルエステルを生成するための新しいパラジウム触媒反応を導入しています. この効率的な方法は,複雑な分子を合成する際に,高い選択性と広範な適用性を提供します.
科学分野:
- 有機化学 オーガニック・ケミストリー
- カタリシス カタリシス カタリシス
- 合成方法論 合成方法論
背景:
- C-H機能化は,現代の有機合成における重要な戦略である.
- C-H結合活性化のための選択的触媒方法の開発は,依然として大きな課題です.
- パラジウム触媒は,C-H機能化のための汎用的な経路を提供します.
研究 の 目的:
- 連続的なC-H酸化とアリレーションのための新しいPd (II) /硫酸化物触媒法を開発する.
- アルファオレフィンからE-arylatedアリルエステルを合成する.
- 複雑な分子断片のための広く適用可能で効率的な合成経路を確立する.
主な方法:
- 連続したアリルC-H酸化に続いて,Pd (II) /硫酸化物触媒システムを用いてビニルC-Hアリレーションを行う.
- アルファオレフィン,カルボキシル酸,アリルボロン酸を原料として利用する.
- 温和な温度 (室温から45°C) で酸化および酸性条件を使用します.
主要な成果:
- E-arylated allylic estersの形成において,高いregi-およびE:Z選択性 (>20:1) を達成した.
- アルファオレフィン,カルボキシル酸,アリルボロン酸に関する広範な基板範囲が実証されています.
- 豊富な炭化水素原材料から,密度が高い機能化された断片を成功して合成した.
結論:
- 開発されたPd (II) /硫酸化物触媒反応は,E-arylatedアリルエステルを合成するための効率的で選択的な方法を提供します.
- この方法論により,複雑な分子構成要素の迅速な組み立てが可能になります.
- 反応の広範囲と容易に入手可能な出発材料の使用は,有機合成における実用的な応用の可能性を強調しています.
関連する概念動画
Carbon Skeletons
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
Organic Compounds
All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
Functional Groups
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
Functional Groups
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
Introduction to Functional Groups
Functional groups are group of atoms with specific chemical properties that occur within organic molecules and sometimes denoted as “R”. Functional groups are found along the carbon backbone of macromolecules can form chains or rings of carbon atoms. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of common functional groups
The table below summarizes some of the major functional groups in organic chemistry. (The...
Functional Groups
Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...


