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Related Concept Videos

Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

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In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
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The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
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Biosynthesis of Nucleic Acids01:28

Biosynthesis of Nucleic Acids

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Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
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Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

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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...
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Phase II Reactions: Miscellaneous Conjugation Reactions01:19

Phase II Reactions: Miscellaneous Conjugation Reactions

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Phase II biotransformations are detoxification mechanisms that conjugate xenobiotics with endogenous substances, neutralizing their toxicity.
A key example involves the conjugation of cyanide ions, which impair cellular respiration and alter hemoglobin into non-oxygen-carrying cyanmethemoglobin. To neutralize this threat, a sulfur atom from thiosulphate is transferred to the cyanide ion, catalyzed by the enzyme rhodanese, resulting in an inactive compound called thiocyanate. The production of...
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Preparation of 1° Amines: Azide Synthesis01:22

Preparation of 1° Amines: Azide Synthesis

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Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
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Facile Preparation of 4-Substituted Quinazoline Derivatives
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Quinoline: Synthesis to Application.

Ravi Kumar Mittal1,2, Meenu Aggarwal3, Kavita Khatana4

  • 1Department of Pharmacy, HIMT, Gautam Budha Nagar, Greater Noida, Uttar Pradesh, 201308, India.

Medicinal Chemistry (Shariqah (United Arab Emirates))
|March 4, 2022
PubMed
Summary
This summary is machine-generated.

This review details quinoline synthesis, reactivity, and therapeutic applications. It highlights quinoline

Keywords:
Quinolinebioactiveheterocyclesquinoline pharmacophorereactivity.therapeutic effect

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Area of Science:

  • Medicinal Chemistry
  • Organic Synthesis
  • Heterocyclic Chemistry

Background:

  • The quinoline scaffold is a crucial heterocyclic motif in medicinal chemistry.
  • Understanding quinoline synthesis and reactivity is vital for drug discovery.
  • Numerous pharmaceuticals incorporate the quinoline ring system.

Approach:

  • This review comprehensively covers quinoline synthesis methodologies.
  • It details the reactivity of the quinoline ring towards various reagents.
  • Spectroscopic properties and pharmacophore characteristics are discussed.

Key Points:

  • New developments in catalytic systems for quinoline synthesis are presented.
  • Reactivity patterns define the quinoline pharmacophore, influencing biological activity.
  • Diverse synthetic approaches are summarized for quinoline derivatives.

Conclusions:

  • This review provides a detailed overview of quinoline chemistry.
  • It connects synthetic strategies with pharmacological relevance.
  • It serves as a resource for researchers in medicinal and synthetic chemistry.