Quinazoline derivatives are widely used in the pharmaceutical industry due to their diverse biological activities. They serve as key structural components in several drugs, particularly anticancer agents, where they inhibit enzymes like tyrosine kinases, which are crucial for cancer cell growth. Additionally, quinazoline compounds are utilized in the development of antihypertensive medications, such as prazosin, which acts as an alpha-1 adrenergic blocker to treat high blood pressure. They also play a role in designing antifungal and antibacterial agents, leveraging their ability to disrupt microbial cell functions. In research, quinazoline scaffolds are explored for their potential in treating neurological disorders, including Alzheimer’s disease, by targeting specific enzymes involved in disease progression. Their versatility makes them valuable in medicinal chemistry for developing targeted therapies.