関連する実験動画
Updated: Jul 11, 2026
14:18
A Strategy for Sensitive, Large Scale Quantitative Metabolomics
Published on: May 27, 2014
すべての8つの7炭素二プロピオネートステレオテトラッドの非対称合成
Ahmad El-Awa1, Xavier Mollat du Jourdin, Philip L Fuchs
1Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
Journal of the American Chemical Society
|June 15, 2007
まとめ
この研究では,ポリプロピオナート天然製品の重要な構成要素であるステレオテトラドを合成するための新しい方法について詳細に述べています. このプロセスは,ダイアステレオセレクティブエポキシデーションとステレオ制御メチル化を含み,可能な8つのステレオテトラッドのうち7つを生成します.
科学分野:
- 有機化学 オーガニック・ケミストリー
- 合成化学 合成化学とは
背景:
- ポリプロピオネート天然製品は,重要な生物学的活性を持つ複雑な分子です.
- ステレオトレードの効率的な合成は,これらの天然製品にアクセスするために不可欠です.
研究 の 目的:
- ステレオトレードを合成するためのダイアステレオ選択的方法を開発する.
- 自然製品合成に関連する8つの可能なステレオトレードのうち7つにアクセスできるようにする.
主な方法:
- サイクロヘプタディエニルスルフォンのエナンチオピュアによるダイアステロセレクティブエポキシデーション.
- エポキシビニルスルフォンのステレオ制御されたシンとアンチメチル化.
- ステレオ化学的確認のためのX線結晶学.
主要な成果:
- エポキシビニルスルフォンで得られた高収量とダイアステロエーマー比.
- すべての8つの可能なステレオトレードにアクセスし,そのうち7つは天然製品に一般的に含まれています.
- ステレオテトラッドは,X線結晶学と酸化割れにより,さらなる合成のために確認された.
結論:
- 開発された方法は,ステレオトレードへの汎用的な経路を提供します.
- このアプローチは,複雑なポリプロピオネート天然製品の合成を容易にする.
- その結果生じるアサイクロス型ステレオテトラッドは,より大きな分子断片に細工するために準備されています.
関連する概念動画
01:12Carbon 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...
03:02Organic 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...
02:18Constitutional Isomers of Alkanes
Organic compounds of the same molecular formula can have different structural formulas called constitutional isomers, and the phenomenon is known as constitutional isomerism. Alkanes with four or more carbons showing multiple structures with the same molecular formula thereby exhibit constitutional isomerism.
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the branched isomers are given...
The linear isomer of an alkane is prefixed by the term “n”; hence a linear isomer of pentane is known as n-pentane. Based on the type of branching, some of the branched isomers are given...
02:18Conformations of Ethane and Propane
In an organic molecule, free rotation about the carbon-carbon single bond results in energetically different conformers of the molecule. Due to this rotation, called the internal rotation, ethane has two major conformations — staggered and eclipsed.
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered ethane, the...
Staggered conformation is a low energy and more stable conformation with the C-H bonds on the front carbon placed at 60°dihedral angles relative to the C-H bonds on the back carbon, leading to a reduced torsional strain. In staggered ethane, the...
02:20Conformations of Butane
Unlike ethane and propane that have only two major conformations, butane has more than two conformers. The staggered form of butane in which the bulky methyl groups on the two carbons are placed on opposite sides, that is, at a dihedral angle of 180°, is the lowest energy, most stable form — called the anti conformer. This conformation is stabilized due to the absence of steric repulsion between the largely spaced out methyl groups. The other two staggered conformations are degenerate and have...
01:16Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides
Naming Acid Halides
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.