Homoaporphines are a class of polycyclic heterocyclic compounds derived from aporphine, featuring an extended or modified molecular structure with additional rings. These natural products and synthetic derivatives exhibit diverse biological activities, making them of significant interest in pharmaceutical research. Structurally, homoaporphines typically contain a basic aporphine nucleus (a 3,4-dihydroisoquinoline) with one or more fused aromatic or heteroaromatic rings, such as benzene, pyrrole, indole, or quinoline units. Due to their complex ring systems and functional groups, homoaporphines can show a wide range of biological effects including anti-inflammatory, antimalarial, and anticancer properties. In terms of chemical synthesis, various strategies have been employed to access these compounds, often involving condensation reactions, cyclization, and intramolecular rearrangements. The study and development of homoaporphines continue to be active areas in medicinal chemistry, aiming to discover more potent therapeutic agents with fewer side effects.