Dual fluorescence and biological evaluation of paracetamol ethers from 4-bromomethylcoumarins

2416-2422Paracetamol 1 has been reacted with 4-bromomethylcoumarins 2 to obtain the corresponding ethers 3 which have been hydrolyzed to the amino ethers 4. Structure of 4 has been confirmed by the chemoselective reaction of 2 with p-aminophenol, which has also been found to yield the thermodynamically controlled products 5 at elevated temperatures. Compounds 3 have been found to exhibit dual fluorescence. IR,1H NMR and mass spectral data have confirmed structures of all the compounds. Biological evaluation has shown that compounds 3e and 3g show good anti-inflammatory and analgesic properties

Design, synthesis and antimicrobial activities of some novel 1,3,4-thiadiazole, 1,2,4-triazole-5-thione and 1,3-thiazolan-4-one derivatives of benzimidazole

A series of novel 1,3,4-thiadiazole; 1,2,4-triazole-5-thione and 1,3-thiazolan-4-one derivatives of benzimidazole were synthesized by nucleophilic substitution reaction of 2-substituted-1[H] benzimidazole. Compounds (1H-benzo[d]imidazol-2-yl)methanamine 3, 2-(isothiocyanatomethyl)-1H-benzo[d]imidazole 4, 4-(1H-benzo[d]imidazol-2-yl)benzenamine 6 and 4-(1H-benzo[d]imidazol-2-yl)benzenamine 7 are synthesized for the synthesis of targeted compounds. Structures of all the targeted synthesized compounds were evaluated by spectral and elemental methods of analysis. All the synthesized compounds were evaluated for antibacterial and antifungal activities. Some of the synthesized compounds showed good antibacterial and antifungal activities with 2.0 and 2.5 μg/mL MIC (minimum inhibitory concentration), respectively