Design and Synthesis of 4-amino-2-phenylquinazolines as Novel Topoisomerase I Inhibitors with Molecular Modeling

4-Amino-2-phenylquinazolines 7 were designed as bioisosteres of 3-arylisoquinolinamines 6 that were energy minimized to provide stable conformers. Interestingly, the 2-phenyl ring of 4-amino-2-phenylquinazolines was parallel to the quinazoline ring and improved their DNA intercalation ability in the DNA-topo I complex.
 

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