Chalcone was prepared by the condensation of arylmethyl ketone and arylaldehyde in the presence of alcoholic alkali. Present study describes the synthesis of a series of (2z)-3-[2-(4-chlorophenyl)-8-methyl imidazo[1,2-a] pyridine-3-yl]-1-substituted arylprop-2-en-1-one compounds (h) 1-9. The compounds were characterized by modern analytical techniques such as CHN analyses, IR, 1 H NMR spectra and further supported by mass spectroscopy. All the title compounds were screened for their in vitro antibacterial and antifungal activity against B.coccus, S.aureus, Pseudomona, E.coli, A.niger, Ampicillin, Amoxicillin, Ciprofloxacin, Norfloxacin, Greseofulvin. Their minimum inhibitory concentrations (MIC) were determined. The results of antibacterial activity showed that compounds h 4, h 9 and antifungal activity compounds h 1, h 9 using standard drug.
A highly functionalized heterocyclic compounds series were synthesized, characterized and tested for biological evaluation against bacteria and fungus. This novel synthetic route involves Schiff base formation reaction of 1,3-diphenyl-1H-pyrazole-4-carbaldehyde with 4-(4-aminophenyl)morpholin-3-one in the presence of base and methanol as a solvent in good yield and high purity. All the synthesized compounds were characterized using IR, 1H NMR and mass spectroscopic techniques. All the compound screened for antimicrobial activity against standard drugs.
An effectual direct synthesis of 1,4-dihydropyrimido[1,2-a]benzimidazole (C-01 to C-10) was developed from 1H-benzo[d]imidazol-2-amine, 4-(benzyloxy)-3-methoxybenzaldehyde, N-(substituted phenyl)-3-oxobutanamide by adding few drop of DMF and in presence of conc.HCL. The product was obtained after about 5 hours of heating in refluxing condition. The synthesized compounds were characterized by different spectral and elemental analysis. Some of the obtained compounds showed a promising antimicrobial activity on screening against Gram-positive and Gram-negative bacterial strains.
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