Understanding the Synthesis of 4-Aminoquinazolines
Author Information
Author(s): Barbosa Maria Letícia de Castro, Pinheiro Pedro de Sena Murteira, Alves da Conceição Raissa, Pires José Ricardo, Franco Lucas Silva, Sant’Anna Carlos Mauricio R., Barreiro Eliezer J., Lima Lídia Moreira
Primary Institution: Federal University of Juiz de Fora
Hypothesis
The study aims to clarify the electronic factors influencing the regioselectivity of nucleophilic aromatic substitution in 2,4-dichloroquinazolines.
Conclusion
The study demonstrates that the carbon atom at the 4-position of 2,4-dichloroquinazoline is more susceptible to nucleophilic attack, confirming the regioselectivity of the reaction.
Supporting Evidence
- DFT calculations showed that the 4-position carbon has a higher LUMO coefficient.
- Lower activation energy was calculated for nucleophilic attack at the 4-position.
- 2D-NMR studies confirmed the substitution pattern in synthesized compounds.
Takeaway
This research shows that a specific part of a chemical structure is easier to change, which helps scientists make new medicines.
Methodology
The study combined DFT calculations with 2D-NMR analysis to investigate the regioselectivity of nucleophilic aromatic substitution.
Limitations
The study primarily focuses on theoretical calculations and may not cover all experimental conditions.
Digital Object Identifier (DOI)
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