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Related Concept Videos

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH301:11

ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3

5.8K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
5.8K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

3.8K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
3.8K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

2.8K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
2.8K
Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

4.6K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.6K

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Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology
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Synthetic Methodology for Asymmetric Ferrocene Derived Bio-conjugate Systems via Solid Phase Resin-based Methodology

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Ferrocenyl β-Diketonate Compounds: Extended Ring Systems for Improved Anticancer Activity.

Benjamin J Hofmann1,2, Enas T Aljohani1, Natalia Cicovacki1

  • 1School of Chemistry, Pharmacy and Pharmacology, University of East Anglia, Norwich, Norfolk, NR4 7TJ, UK.

Chembiochem : a European Journal of Chemical Biology
|October 24, 2024
PubMed
Summary

New ferrocenyl β-diketonate compounds show increased anticancer activity with more aromatic rings. The anthracenyl derivative is the most potent, effectively targeting triple-negative breast cancer cells.

Keywords:
AcetylacetoneAnticancerBioinorganicFerrocenylFluorescence

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Area of Science:

  • Organometallic Chemistry
  • Medicinal Chemistry
  • Cancer Biology

Background:

  • Ferrocenyl compounds are explored for their unique electronic properties and potential therapeutic applications.
  • β-diketonate ligands offer versatile coordination chemistry and can influence biological activity.
  • Developing novel anticancer agents remains a critical area of research.

Purpose of the Study:

  • To synthesize and characterize a library of ferrocenyl β-diketonate compounds with varied aromatic substituents.
  • To evaluate the in vitro cytotoxic potential of these compounds against a panel of human cancer cell lines.
  • To investigate the structure-activity relationship concerning aromaticity and cytotoxicity.

Main Methods:

  • Synthesis and full characterization of ferrocenyl β-diketonate library.
  • Single crystal X-ray diffraction for structural analysis.
  • Cytotoxicity assessment using MTT assays against MIA PaCa-2, A2780, MDA-MB-231, MCF-7, and ARPE-19 cell lines.
  • Analysis of cellular mechanisms including reactive oxygen species (ROS) production and cell morphology changes.
  • Confocal microscopy to visualize compound decomposition within cells.

Main Results:

  • A library of ferrocenyl β-diketonates with varying aromatic functionalities was successfully synthesized and characterized.
  • Cytotoxicity increased with the number of aromatic rings, following the trend anthracenyl > naphthyl > phenyl > methyl.
  • The anthracenyl-substituted compound exhibited significant cytotoxicity, particularly against the MDA-MB-231 triple-negative breast cancer cell line.
  • Mechanistic studies revealed ROS production and morphological changes, with the lead compound decomposing into a cytotoxic fluorescent molecule within cells.

Conclusions:

  • Ferrocenyl β-diketonates represent a promising class of anticancer agents.
  • The degree of aromatic substitution significantly influences cytotoxic potency.
  • The anthracenyl-substituted ferrocenyl β-diketonate is identified as a lead compound for further anticancer drug development.