シラサイクル二ペプチドの合成:二ペプチドのN端とC端の両方でペプチドの延長
関連する実験動画
Updated: Oct 6, 2025
07:11
Constructing Cyclic Peptides Using an On-Tether Sulfonium Center
Published on: September 28, 2022
2.8K
Tomohiro Hattori1, Hisashi Yamamoto1
1Peptide Research Center, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan.
Journal of the American Chemical Society
|January 21, 2022
まとめ
ペプチド結合形成の新しい方法は,シラサイクリックアミノ酸とイミダゾリルシランを使用しています. このアプローチはペプチド合成を簡素化し,効率的なダイペプチド,テトラペプチド,オリゴペプチド構造を可能にします.
科学分野:
- 有機化学
- ペプチド化学
- 合成化学
背景:
- 古典的なペプチド合成には,しばしば複雑な保護/脱保護のステップが含まれます.
- 効率的で汎用的な結合反応剤の開発は,ペプチド合成を進めるために不可欠です.
研究 の 目的:
- シラサイクリックアミノ酸を用いた新しいペプチド結合形成戦略を導入する.
- イミダゾリシランの結合反応剤としての有用性を調査する.
- 新種のシラサイクリックディペプチドの合成とペプチド延長におけるその応用を実証する.
主な方法:
- N,C末端の無保護アミノ酸をアミノ酸テルブチルエステルで利用する.
- イミダゾリシランを二ペプチド合成の結合反応剤として使用する.
- 制御された反応条件下での連続的な脱保護と循環.
主要な成果:
- 保護されていないアミノ酸から新しいシラサイクロンジペプチドの合成を成功させた.
- ペプチドの延長のための基板としてのシラサイクルの化合物の実証された能力 (ヌクレオフィールとエレクトロフィールとして作用する).
- サイトセレクティブなテトラペプチド合成を達成した.
結論:
- 開発された方法は,古典的なペプチド合成を大幅に簡素化しています.
- シラサイクルのアミノ酸誘導体は,複雑なペプチドの構築のための多用途のプラットフォームを提供します.
- イミダゾリシランは効率的なペプチド結合形成のための有効な反応剤です.
関連する概念動画
01:28Peptidoglycan Synthesis
608
Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan...
608
02:43Peptide Bonds
78.6K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
78.6K
01:29Preparation of Amides
3.3K
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC).
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
3.3K
01:29Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
4.9K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.9K
01:28ATP and Macromolecule Synthesis
6.2K
Biological macromolecules are organic compounds, predominantly composed of carbon atoms. The carbon atoms are covalently bonded with hydrogen, oxygen, nitrogen, and other minor elements. There are four major biological macromolecule classes: carbohydrates, lipids, proteins, and nucleic acids.
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
Most macromolecules are composed of single subunits, or building blocks, called monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.
Conversion of...
6.2K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K