%0 Journal Article %T Synthesis, Spectral Studies and Biological Activities of Quinazolin-4-one based some new Pyrazolines derivatives %A RM SHAH %A NK prajapati %A Dr. Pankaj S Patel %J International Journal For Pharmaceutical Research Scholars %D 2012 %I International Journals for Pharmaceutical Research Scholars %X 3-{4-[5-(substitutedphenyl)-4,5-dihydro-pyrazol-3-yl]phenyl}-6-iodo-2-thioxo-2,3-dihydroquinazolin-4-one have been prepared by the refluxation for three hours of 3-{4-[3-substitutedphenyl)prop-2-enoyl]phenyl}-6-iodo-2-thioxo-2,3 dihydroquinazolin -4-one in presence of ethanol & hydrazinehydrate. After Synthesis Compounds Were Characterized by Chemical as Instrumental Methods. LikeElemental, IR and NMR. All the synthesized products were evaluated for their antimicrobial activity.All the compounds were tested for their antibacterial and antifungal activities by broth dilution method. %K Hydrazine hydrate. Ethanol %K IR %K NMR %K Antimicrobial activity %U http://www.ijprs.com/download.php?file=1346149012.pdf