Chandrakantha, B.Isloor, A.M.Peethambar, S.K.Shetty, P.2026-02-052012Der Pharma Chemica, 2012, 4, 4, pp. 1723-1729https://idr.nitk.ac.in/handle/123456789/26895A series of new N-(substituted)-5-phenyl-1-(quinolin-2-yl)-1H-pyrazole-4-carboxamide derivatives (5a-h) have been synthesized by condensing ethyl-3-(dimethylamino)-2-[(phenyl)carbonyl]prop-2-enoate 2 with quinoline-2-yl-hydrazine. Compound 3 is hydrolyzed into 4 which is upon further coupled with different aromatic/aliphatic amines using 50% prpopyl phosphonic anhydride (T3P) in ethyl acetate as coupling reagent to afford different quinoline substituted pyrazole carboxamide derivatives. All the newly synthesized compounds were screened for their invitro antibacterial studies against Escherichia coli, Bacillus subtilis and Pseudomonas aeruginosa. The results revealed that compounds 5d, 5f, and 5h showed good antibacterial activity towards all bacterial strains. These newly synthesized compounds were characterized by NMR, mass spectral, IR spectral study and also by C, H, N analyses.(4 methylpiperazin 1 yl) [5 phenyl 1 (quinolin 2 yl) 1h pyrazol 4 yl]methanone[5 phenyl 1 (quinolin 2 yl) 1h pyrazol 4 yl](piperazin 1 yl)methanoneacid anhydridemorpholin 4 yl [5 phenyl 1 (quinolin 2 yl) 1h pyrazol 4 yl]methanonen (2,6 dimetylphenyl) 5 phenyl 1 (quinolin 2 yl) 1h pyrazole 4 carboxamiden cyclohexyl 5 phenyl 1 (quinolin 2 yl) 1h pyrazole 4 carboxamiden cyclopentyl 5 phenyl 1 (quinolin 2 yl) 1h pyrazole 4 carboxamiden,n diethyl 5 phenyl 1 (quinolin 2 yl) 1h pyrazole 4 carboxamiden,n dimethyl 5 phenyl 1 (quinolin 2 yl) 1h pyrazole 4 carboxamideplacebopropylphosphonic anhydridepyrazole derivativestreptomycinunclassified drugantibacterial activityantibiotic sensitivityarticleBacillus subtiliscarbon nuclear magnetic resonancecontrolled studydrug screeningdrug synthesisEscherichia coliin vitro studyminimum inhibitory concentrationnitrogen nuclear magnetic resonancenonhumanproton nuclear magnetic resonancePseudomonas aeruginosa