Antibacterial activities with the structure-activity relationship of coumarin derivatives.

The development of drug-resistant bacteria, as well as multidrug-resistant pathogens related to substantial mortality, is an important global health threat. The wide range of biological activities and the wealthy use of coumarin-containing drugs in the clinic have encouraged more and more interest in this class of heterocycles. Various coumarin-based antibiotic hybrids have been developed in the last decade and most of them exhibited potential antibacterial potency. This present review summarizes the current innovations of coumarin-based derivatives with potential antibacterial activities against a variety of Gram-negative and Gram-positive bacteria discussing various aspects of structure-activity relationship (SAR). The improved SAR will provide further insight into the rational improvement of coumarin hybrids with astounding strength against multidrug-resistant bacteria.