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Iodoarenes are chemical compounds that have an iodine atom linked to an aromatic ring. These compounds have distinct features and are used in a variety of fields, including organic synthesis, medicines, and materials science. The addition of an iodine atom to an aromatic ring drastically affects the molecule's reactivity and characteristics, making iodoarenes useful building blocks in chemical synthesis. Iodoarenes are frequently synthesized by iodination processes, in which an aromatic substrate is substituted with iodine. The Sandmeyer reaction, in which an aryl diazonium salt reacts with potassium iodide, and electrophilic iodination, which uses molecular iodine or iodine derivatives in the presence of a catalyst or oxidizing agent, are two common ways. These approaches allow for the selective incorporation of iodine into the aromatic ring, resulting in a wide range of iodoarene derivatives with different substitution patterns. The inclusion of an iodine atom in iodoarenes confers particular reactivity, making them useful intermediates in organic reactions. Iodoarenes are well-known for their role in transition metal-catalyzed cross-coupling reactions such as the Suzuki, Heck, and Sonogashira reactions. These reactions enable the creation of carbon-carbon or carbon-heteroatom bonds, which is necessary for the synthesis of complex organic compounds and medications. Furthermore, iodoarenes act as precursors in radiochemistry. Radioiodination, which involves introducing a radioactive isotope of iodine into organic molecules, is frequently employed in molecular imaging and radiation to diagnose and treat a variety of disorders, including cancer. The capacity to combine radioactive iodine into certain chemical molecules allows for the detection and targeted elimination of sick cells while limiting damage to healthy tissues. Iodoarenes are used in pharmaceutical development because of their capacity to influence biological activity.Iodine-containing compounds can alter pharmacological potency, selectivity, and pharmacokinetic features, making them useful for drug design and discovery. Iodoarenes also have uses in materials science, where they act as precursors in the creation of liquid crystals, polymers, and organic electronic materials due to their unique electrical and structural properties. To summarize, iodoarenes are an important class of chemicals with numerous applications in organic synthesis, medicines, radiochemistry, and materials research due to their unique reactivity and functionalization capabilities. Their adaptability continues to fuel innovation in a variety of scientific fields.