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Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

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Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
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Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:22

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Cholinergic agonists or cholinomimetics mimic the action of acetylcholine to stimulate the parasympathetic nervous system. They are categorized into direct-acting and indirect-acting agents. The direct-acting cholinergic drugs induce the parasympathetic response by directly binding to the muscarinic or nicotine receptors. In comparison, the indirect-acting cholinergic drugs prevent acetylcholine hydrolysis, indirectly contributing to the extended parasympathetic response.
The direct-acting...
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Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:29

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Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
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Cholinergic Antagonists: Chemistry and Structure-Activity Relationship01:29

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Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic...
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Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
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Drug Discovery: Overview01:26

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Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
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Novel bioactive coumarin derivatives: structural features and predictive bioactivity evaluation.

Adriana Rios-Alegre1, Ramón Guzmán-Mejía2, Judit Araceli Aviña-Verduzco2

  • 1Laboratorio 4, Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca 62209, Morelos, Mexico.

Acta Crystallographica. Section C, Structural Chemistry
|July 4, 2025
PubMed
Summary

Two novel coumarin derivatives were synthesized and characterized. Coumarin derivative Cou01 shows promising potential as an antioxidant and anti-inflammatory agent due to its reactivity and electronic properties.

Keywords:
DFTbioactivebioactivity evaluationcoumarincrystal structurein silico evaluationsynthetic pathway

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Area of Science:

  • Organic Chemistry
  • Crystallography
  • Computational Chemistry

Background:

  • Coumarin derivatives are known for diverse biological activities.
  • Understanding structure-activity relationships is crucial for drug design.

Purpose of the Study:

  • Synthesize and structurally characterize two novel coumarin derivatives.
  • Investigate their electronic properties and potential bioactivities.
  • Evaluate the influence of substituents on molecular properties and bioactivity.

Main Methods:

  • Synthesis of coumarin derivatives (Cou01 and Cou02).
  • Characterization using NMR spectroscopy, mass spectrometry, and single-crystal X-ray diffraction.
  • In silico analysis using density functional theory (DFT) for electronic properties and bioactivity prediction.

Main Results:

  • Cou01 and Cou02 were successfully synthesized and structurally elucidated.
  • X-ray diffraction revealed specific crystal packing influenced by hydrogen bonds.
  • DFT calculations showed Cou01 possesses high reactivity and electron-donating potential.
  • Predicted bioactivity suggests Cou01 has significant antioxidant and anti-inflammatory potential.

Conclusions:

  • Coumarin derivatives Cou01 and Cou02 exhibit distinct structural and electronic properties.
  • The substituent at the 7-position significantly impacts bioactivity and toxicological profiles.
  • Coumarin derivative Cou01 is a promising candidate for further development as an antioxidant and anti-inflammatory agent.