title: Synthesis of novel selenium-containing sulfa drugs and their antibacterial activities.
abstract: Synthesis of 3-[4-(N-substituted sulfamoyl)phenyl]-3,4-dihydro-4-oxo-7,9-dimethylpyrido[3',2':4,5]selenolo[3,2-d]pyrimidines, 7-[4-(N-substituted sulfamoyl)phenyl]-7,8-dihydro-8-oxo-3,4-diphenylpyrimido[4',5':4,5]selenolo [2,3-c]pyridazines and 1-[4-(N-substituted sulfamoyl)phenyl]-1,11-dihydro-11-oxo-4-methylpyrimido[4',5':4,5]selenolo[2,3-b]quinolines is reported. 4-Amino-N-pyrimidine-2-ylbenzene sulfonamide (a), 4-amino-N-(2,6-dimetnylpyrimidin-4-yl)benzene sulfonamide (b), N-[(4-aminophenyl)sulfonyl] acetamide (c) with N-ethoxymethyleneamino of selenolo pyridine, selenolo pyridazine and selenolo quinoline derivatives respectively were obtained starting from 1-amino-N-substituted sulfanilamides. Spectroscopic data (IR, (1)H NMR, (13)C NMR and Mass spectral) confirmed the structure of the newly synthesized compounds. Substituted pyrimidines, pyridazines and quinolines were screened for antibacterial activity against gram-positive and gram-negative bacteria. Selenolo derivative of N-[(4-aminophenyl)sulfonyl] acetamide (substitutent of sulfacetamide c) showed strong bactericidal effect against all the tested organisms. Selenolo[3,2-d]pyrimidin (substitutent a) showed a good bactericidal effect against Serratia marcescens, Staphylococcus aureus and Escherichia coli. Compounds Selenolo[2,3-c]pyridazine (substitutent b), Selenolo[2,3-b]quinoline(substitutents c)) exhibited a moderate bactericidal effect against Serratia marcescens. None of the synthesized selenopyridazines has a considerable antimicrobial activity against the tested organisms. The minimum inhibitory concentration (MIC) of the most active compound - 3-[4-(N-acetyl sulfamoyl)phenyl]-3,4-dihydro-4-oxo-7,9-dimethylpyrido[3',2':4,5]selenolo [3,2-d]pyrimidine was 10 mg mL(-1).
authors.affiliation: Chemistry department, Faculty of Science, Assiut University, Assiut 71516, Egypt. sabdel68@yahoo.co.uk
authors.forename: Sh H
authors.initials: ShH
authors.lastname: Abdel-Hafez
mesh_terms: D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D016566:Organoselenium Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011724:Pyridazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013329:Structure-Activity Relationship; D013449:Sulfonamides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: C551227:3-(4-(N-acetyl sulfamoyl)phenyl)-3,4-dihydro-4-oxo-7,9-dimethylpyrido(3',2':4,5)selenolo (3,2-d)pyrimidine; D016566:Organoselenium Compounds; D011724:Pyridazines; D011743:Pyrimidines; D011804:Quinolines; D013449:Sulfonamides