Title:2-Arylquinazolin-4(3H)-ones: Inhibitory Activities Against Xanthine Oxidase
VOLUME: 12 ISSUE: 1
Author(s):Humaira Zafar, Syed M. Saad, Shahnaz Perveen, Arshia, Rizwana Malik, Ajmal Khan, Khalid M. Khan and Muhammad I. Choudhary
Affiliation:H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.
Keywords:2-Arylquinazolin-4(3H)-ones, xanthine oxidase inhibition, uric acid, gout, allopurinol.
Abstract:2-Arylquinazolin-4(3H)-ones (1-25) were synthesized, and evaluated for their xanthine oxidase
inhibitory activity. Significant to moderate activities were exhibited by the compounds 1-3, 7, 9,
13-15, 19-21, and 23 with IC50 between 2.80 - 28.13 µM as compared to the standard allopurinol (IC50
(IC50 = 2.01 ± 0.01 µM). Compounds 4-6, 8, 11-12, 16-18, 22, and 24 demonstrated a weak activity with IC50 values
44.60 - 112.60 µM. Nonetheless, compounds 10 and 25 did not show any activity. Amongst all derivatives, compound 2,
containing a C-4´ dimethylamino group, was the most potent inhibitor of the enzyme with an IC50 value comparable to the
standard. Kinetics studies on the most active compounds (2, 7, 9, 14, 15, 19, and 20) were conducted in order to determine
their modes of inhibition and dissociation constants Ki. Some of the compounds of 2-arylquinazolin-4(3H)-one series
were thus identified as potential leads for further studies towards the treatment of hyperuricemia and gout.
