Conventional-Microwave Mediated Synthesis and In Vitro Antimicrobial Activity of Novel Carbazole-Efflux Pump Inhibitor Hybrid Antibacterials

Scheme 1

Synthesis of potential antibiotic compounds 2–5. (a) Histidine, (b) rubeanic acid, (c) indole-3-acetic acid, and (d) gallic acid.