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関連する概念動画

Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

4.2K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
4.2K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.9K
Drug-Receptor Bonds01:25

Drug-Receptor Bonds

5.4K
Drug-receptor bonds are formed through various chemical forces when drugs interact with target cells. Covalent bonds, strong and irreversible, are exemplified by DNA-alkylating anticancer agents that inhibit cell division. However, such irreversible drug binding lacks selectivity and can modify the DNA of the surrounding healthy cells. Covalent binding often contributes to tissue toxicity, as seen with chloroform and paracetamol metabolites binding to the liver, causing hepatotoxicity.
In...
5.4K
Drug Metabolism: Phase II Reactions01:14

Drug Metabolism: Phase II Reactions

5.6K
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
5.6K
Phase II Conjugation Reactions: Overview01:14

Phase II Conjugation Reactions: Overview

1.2K
Conjugation, a key component of phase II biotransformation reactions, is a vital process in drug detoxification. It involves transferring endogenous substances like glucuronic acid, sulfate, and glycine to drugs or their metabolites formed in phase I reactions. These conjugation reactions, often catalyzed by specific enzymes, transform potentially harmful metabolites into inactive, water-soluble forms easily excreted in urine or bile. By enhancing polarity and eliminating pharmacological...
1.2K
Phase II Reactions: Sulfation and Conjugation with α-Amino Acids01:19

Phase II Reactions: Sulfation and Conjugation with α-Amino Acids

1.3K
Sulfation and α-amino acid conjugation are two critical biotransformation reactions in drug metabolism. Sulfation, a phase II biotransformation reaction, involves adding a polar sulfate group to a drug, enhancing its water solubility and promoting excretion. This process can either co-occur with or occur independently of glucuronidation. Nonmicrosomal sulfotransferase enzymes catalyze the process. The reaction involves 3'-phosphoadenosine-5'-phosphosulfate or PAPS coenzyme...
1.3K

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関連する実験動画

Updated: Apr 9, 2026

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

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アルキーン・リンチピン・ストラテジー・フォー・ドラッグ:メタ・セレクティブ・インバース・ソノガシラ・カップリングの実験的・計算的実現

Sandip Porey1, Xinglong Zhang2, Suman Bhowmick1

  • 1Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India.

Journal of the American Chemical Society
|January 9, 2020
PubMed
まとめ

この研究は,C-H活性化のためのアルキンリンチピンを使用して,新しい後期機能化戦略を導入しています. sp2に富んだ化合物を sp3に富んだ断片と結びつけることで,様々な製薬および農業化学の類似物を生み出すことができます.

さらに関連する動画

Genetic Encoding of a Non-Canonical Amino Acid for the Generation of Antibody-Drug Conjugates Through a Fast Bioorthogonal Reaction
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Genetic Encoding of a Non-Canonical Amino Acid for the Generation of Antibody-Drug Conjugates Through a Fast Bioorthogonal Reaction

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Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates
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Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates

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関連する実験動画

Last Updated: Apr 9, 2026

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

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Genetic Encoding of a Non-Canonical Amino Acid for the Generation of Antibody-Drug Conjugates Through a Fast Bioorthogonal Reaction
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Genetic Encoding of a Non-Canonical Amino Acid for the Generation of Antibody-Drug Conjugates Through a Fast Bioorthogonal Reaction

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Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates
08:47

Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates

Published on: March 6, 2019

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科学分野:

  • 有機化学
  • 薬剤化学
  • カタリシス

背景:

  • 後期機能化 (LSF) は,薬の発見と開発に不可欠です.
  • サイト・セレクティブのC-H活性化により,新しい化学物質への効率的な経路が提供されます.
  • 新しい治療薬と農薬の発見には 合成的に利用可能な化学領域の拡大が不可欠です

研究 の 目的:

  • 遅段階の機能化 (LSF) のための新しいC-H機能化戦略を開発する.
  • 販売されている医薬品/農薬のコンジュガートを3D断片と天然製品で組み立てる.
  • sp2豊富な化合物の地域選択的改変を調査する.

主な方法:

  • C-H活性化のためのアルキンのリンチピン戦略を利用した.
  • テンプレートアシストの逆ソノガシラ反応を用いた.
  • α-アミノ酸のディスタル構造的変化を調査した.
  • 計算と実験のメカニズムを研究した.

主要な成果:

  • C-H機能化におけるメタポジションの選択性が高い.
  • sp2とsp3が豊富に結合した分子です.
  • アルキンの機能を他のグループに変換することを示した.
  • 移動性挿入とシリル移動を含むメカニズムを明らかにした.

結論:

  • 開発されたLSF戦略は,多様な構造的な類似点へのアクセスを提供します.
  • アルキンのリンチピンアプローチは 複雑な分子断片を効果的に結びつけます
  • 精密な分子組成を可能にします.
  • この方法は,医薬品と農業化学の開発に大きな可能性を秘めています.