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Indian J Pharm Sci. 2009 Sep;71(5):572-5. doi: 10.4103/0250-474X.58185.

Synthesis, Structure Activity Relationship Studies and Pharmacological Evaluation of 2-Phenyl-3-(Substituted Phenyl)-3H-Quinazolin-4-ones as Serotonin 5-HT(2) Antagonists.

Indian journal of pharmaceutical sciences

N Sati, S Kumar, M S M Rawat

Affiliations

  1. Department of Pharmaceutical Sciences, H. N. B. Garhwal University, Srinagar Garhwal-246 174, India.

PMID: 20502582 PMCID: PMC2866355 DOI: 10.4103/0250-474X.58185

Abstract

Benzoyl chloride was added to the solution of anthranilic acid in pyridine to afford crude 2-phenyl-benzo[d][1, 3] oxazin-4-one (1). To the solution of compound 1 in dry toluene, various substituted anilines were added and the mixture refluxed for 8 h to afford 2-phenyl-3-(substituted phenyl)-3H-quinazolin-4-ones (2a-2f). All the compounds were obtained in solid state in yields varying between 40 to 70%. Spectral characterization included FTIR, (1)H NMR and Electrospray MS. The synthesized compounds were screened for 5-HT(2) antagonist activity. Some of the title compounds have been found to show significant 5-HT(2) antagonist activity. The compound 2b, 3-(2-chlorophenyl)-2-phenyl-3H-quinazolin-4-one was the most potent derivative in the series of compound synthesized.

Keywords: 5-HT2 antagonists; aryl quinazolines; quinazolin-4-ones; serotonin antagonists

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