Abstract
A systematic study of tethering various groups on 6-phenyl ring of 4-hydroxy-6-phenyl-3-[(2-iso-propylphenyl)thio]pyran-2-one was performed to increase the binding affinity with HIV protease. This tethering approach was aimed to fill S3pocket of the enzyme. Thus, tethering hydrophilic groups resulted in more potent inhibitors. Similarly, various aromatic hydrophobic rings as well as heterocyclic rings were explored as tethering substitutents to alter the physical properties as well as to enhance the binding affinity with HIV protease. Inhibitor24,4-hydroxy-3-[(2-isopropylphenyl)thio]-6-[4-(3-pyridinylmethoxy)phenyl]-2H-pyran-2-one, was evaluated as a prototypic lead structure to study various physical as well as pharmacological properties of this class of HIV protease inhibitors.
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