4-Aminobenzeneboronic acid pinacol ester is a reagent used for Suzuki-Miyaura cross-coupling reactions, Mercury(II) detection by fluorometry with new fluorogenic indicators based on through-bond energy transfer from pentaquinone to rhodamine, Rhodium-catalyzed amination reactions and Palladium-catalyzed Suzuki cross-coupling to synthesize potential antitubercular and antimicrobial compounds. It is also used as a reagent in preparation of Hexaphenylbenzene derivatives as a potential bioprobe and multichannel keypad system, Pyromellitic diimide-based polymer as matrix for solution-processable n-channel field-effect transistors, alternating copolymers of oligoarylenes and naphthalene bisimides as low band gap semiconductors with electrochemical and spectroelectrochemical behavior and γ-secretase modulators in the treatment of Amyloid β formation.