Synthesis and Bio-Evaluation of Quaternized Fused-β-Carbolines as Anti-MRSA Agents.

The drastic increase in the emergence of methicillin and vancomycin resistant S. aureus has resulted in almost negligible treatment options available to tackle these drug-resistant strains and therefore, search for newer antibiotics is essential. In this context, a new series of quaternized fused β-carbolines was synthesized and evaluated for its anti-bacterial potential. Several compounds from the series displayed potent anti-bacterial activity against Gram-positive bacteria including the drug-resistant strains with minimal cytotoxicity and promising bactericidal action.