The search for effective antibiotics continues among scientists as more resistant pathogenic microorganisms evolve, and some already existing antibiotics used in treatment of infections are gradually becoming less effective against the pathogens causing the infections thus, making life unbearable to their hosts. Phenazines are para diazine with annular two nitrogen atoms at 1,4 positions joined to two phenyl group in a side by side pattern. The derivatives of the compound are primarily produced from microorganisms and can also be synthesized, example of this is phenazine-1-carboxylic acid (PCA). In the present study, phenazine-1-carboxylic acid was biosynthesized from Pseudomonas aeruginosa isolated from soil. Subsequently, phenazineazo-1- naphthol was synthesized from the produced phenazine-1-carboxylic acid following amidation with Ammonium carbonate and Hoffmann degradation reactions to reduce the compound to phenazineamine under reflux condition of 50 °C before diazotization and coupling with 1-naphthol. The results obtained from the UV-vis, IR and NMR spectra were able to elucidate the important peaks in the compound at reasonable extents. The concentrations of 50 ?g/mL, 100 ?g/mL, 150 ?g/mL, 200 ?g/mL, 30 ?g/mL Augmentin (Au, control drug), 30 ?g/mL Oflocitoxin (OFX, control drug) and raw sample of the compound were able to inhibit Staphylococcus aureus and Escherichia coli at some millimeter ranges while Aspergillus fumigatus was inhibited by all the sample concentrations but resisted 30 ?g/mL Augmentin (Au) and Oflocitoxin (OFX) control drugs from the antimicrobial analysis carried out. In general, the compound was active against the organisms when compared to the concentrations of control antibiotic drugs used. The minimum inhibitory concentration of the compound was estimated at 50 ?g/mL concentrations.
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