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Updated: Aug 6, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
N-Benzyl-2-chloro-quinazolin-4-amine
Tarek Mohamed1, Abdeljalil Assoud2, Praveen P N Rao3
1Department of Chemistry, University of Waterloo, 200 University Ave. W, Waterloo, Ontario N2L 3G1, Canada ; School of Pharmacy, Health Sciences Campus, University of Waterloo, 200 University Ave. W, Waterloo, Ontario N2L 3G1, Canada.
This study details the crystal structure of a chloro-substituted quinazoline compound (C15H12ClN3). Two independent molecules were observed, with planar quinazoline rings and specific dihedral angles to phenyl rings, forming hydrogen-bonded chains in the crystal lattice.
Area of Science:
- Crystallography
- Organic Chemistry
- Materials Science
Background:
- Quinazoline derivatives are important scaffolds in medicinal chemistry and materials science.
- Understanding the solid-state structure of novel quinazoline compounds is crucial for their application development.
Purpose of the Study:
- To elucidate the crystal structure of the title compound, C15H12ClN3.
- To analyze the molecular geometry, including planarity of the quinazoline ring and dihedral angles with phenyl substituents.
- To investigate intermolecular interactions and packing in the crystalline state.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the crystal structure.
- The asymmetric unit was analyzed, revealing two independent molecules.
- Intermolecular interactions, specifically N-H⋯N hydrogen bonds, were identified and characterized.
Main Results:
- The asymmetric unit contains two independent molecules of C15H12ClN3.
- Both molecules exhibit essentially planar quinazoline ring systems.
- Significant dihedral angles (88.25(8)° and 85.28(16)°) were observed between the quinazoline and phenyl rings.
- Alternating independent molecules form chains along the [001] direction via N-H⋯N hydrogen bonds.
Conclusions:
- The crystal structure of C15H12ClN3 has been successfully determined.
- The compound displays specific molecular conformations and intermolecular hydrogen bonding patterns.
- These structural features provide insights into the solid-state behavior and potential properties of this quinazoline derivative.
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