Benzannulation is a chemical term that refers to the process of fusing a benzene ring onto a different molecule. Synonyms for this term include benzofusion, aryl fusion, and aromatic fusion. The process of benzannulation is used in organic chemistry for the synthesis of new compounds that may have valuable properties. This reaction is a vital tool in the creation of organic molecules for the pharmaceutical industry, as many drugs are based on benzene rings. Overall, benzannulation is a versatile and useful process for researchers to explore the synthesis of new molecules with potential benefits for medicine and industry.