Naturally occurring and structural analogues of quinones offering new research directions for the discovery of anticancer drugs

In search of ground-breaking strategies in the field of cancer treatment, researchers are looking for novel chemicals with strong anticancer properties in the new frontier of structural engineering. This book chapter underscores the potential of quinones, both from natural sources and synthetic derivatives, as a rich source of inspiration for the discovery of novel anticancer drugs. By bridging the gap between traditional medicine and modern drug development, these compounds offer exciting research directions that may pave the way for innovative cancer therapies with improved safety and efficacy profiles. Benzoquinones, naphthoquinones, and anthraquinones, three important forms of quinones distinguished by their structures and properties are the main topics of this chapter. Here we collected significant naturally occurring and synthetic derivatives of quinones from these three primary classes. We have provided an overview of the mechanisms through which these quinones exert their anticancer effects, including their role as redox-active molecules, inhibitors of key enzymatic pathways, and inducers of apoptosis. Furthermore, it discusses recent advances in the isolation and characterization of naturally occurring quinones, shedding light on their unique chemical structures and bioactivities. These natural quinones, often drawing inspiration from traditional medicinal practices, have shown promise as lead compounds for drug development. Additionally, the synthesis and structural modification of quinones in the pursuit of improved anticancer agents are explored. The rational design of quinone analogues allows for fine-tuning of their pharmacological properties, enhancing their efficacy and selectivity against cancer cells while minimizing off-target effects. Moreover, the chapter examines the challenges and opportunities posed by natural and synthetic derivatives, addressing issues of stability, formulation, and pharmacokinetics. Ultimately, this exploration into the structural manipulation of quinones serves as an illuminating guide for scientists and clinicians alike, offering fresh perspectives and research directions in the ongoing quest for effective and innovative anticancer drugs.