Amines constitute an important class of organiccompounds derived by replacing one or more hydrogenatoms of ammonia molecule by alkyl/aryl group(s). Innature, they occur among proteins, vitamins, alkaloidsand hormones. Synthetic examples include polymers,dyestuffs and drugs. Two biologically active compounds,namely adrenaline and ephedrine, both containingsecondary amino group, are used to increase bloodpressure. Novocain, a synthetic amino compound, isused as an anaesthetic in dentistry. Benadryl, a wellknown antihistaminic drug also contains tertiary aminogroup. Quaternary ammonium salts are used assurfactants. Diazonium salts are intermediates in thepreparation of a variety of aromatic compoundsincluding dyes. In this Unit, you will learn about aminesand diazonium salts

Amines are important organic compounds that are derived from ammonia by replacing one or more hydrogen atoms with alkyl/aryl groups. They can be found in proteins, vitamins, alkaloids, and hormones in nature. Synthetic examples of amines include polymers, dyes, and drugs. Adrenaline and ephedrine are two biologically active compounds that contain a secondary amino group and are used to increase blood pressure. Novocain, a synthetic amino compound, is used as an anesthetic in dentistry. Benadryl, a well-known antihistaminic drug, also contains a tertiary amino group. Quaternary ammonium salts are used as surfactants. Diazonium salts are intermediates in the preparation of various aromatic compounds, including dyes. In this unit, you will learn about amines and diazonium salts.