A Versatile Direct Approach to ortho-Substituted Azobenzenes from Benzotriazoles

摘要

Benzotriazole (Bt) has been widely utilized by the research group of Katritzky as a synthetic auxiliary in a multitude of reactions. Benzotriazole is an inexpensive, stable, and biologically innocuous compound which can be easily introduced into organic molecules. After conferring its multiple activating influences for carrying out precise transformation reactions, it can be easily removed and can generally be recycled. The early results in the chemistry of benzotriazole have been described by Katrizky and co-workers.