title: Syntheses and evaluation of 3-(3-bromo phenyl)-5-phenyl-1-(thiazolo [4,5-b] quinoxaline-2-yl)-2-pyrazoline derivatives.
abstract: A variety of 3-(3-bromo phenyl)-5-phenyl-1-(thiazolo [4,5-b] quinoxaline-2-yl)-2-pyrazoline were obtained by the refluxing of 1-N-thiocarbamoyl 3,5-diphenyl-2-pyrazoline with 2,3-dichloroquinoxaline. The chemical structures of the compounds were elucidated by UV, IR, (1)H NMR, and (13)C NMR spectroscopy. The purity of the compounds was confirmed by their elemental analysis. The antiamoebic activity of these compounds was evaluated by microdilution method against HMI:IMSS strain of Entamoeba histolytica and the IC(50) values were compared with the standard drug metronidazole. Some of the quinoxaline derivatives showed less IC(50) values than metronidazole. To elucidate the toxic effect, MTT assay was performed using kidney epithelial cell line. The results showed that all the compounds are non-toxic.
authors: Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
authors: Asha
authors: A
authors: Budakoti
authors: Abdul R
authors: AR
authors: Bhat
authors: Fareeda
authors: F
authors: Athar
authors: Amir
authors: A
authors: Azam
mesh_terms: D000818:Animals; D000981:Antiprotozoal Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D017605:Bromine Compounds / Q000737:chemistry*; D004748:Entamoeba histolytica / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011720:Pyrazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D011810:Quinoxalines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship; D013844:Thiazoles / Q000737:chemistry*
chemical_list: D000981:Antiprotozoal Agents; D017605:Bromine Compounds; D011720:Pyrazoles; D011810:Quinoxalines; D013844:Thiazoles