tailieunhanh - Ebook Introduction to general, organic and biochemistry (9th edition): Part 2
(BQ) Part 2 book "Introduction to general, organic and biochemistry" has contents: Amines, aldehydes and ketones, carboxylic acids, carboxylic anhydrides, esters, and amides, nucleotides, nucleic acids, and heredity, biosynthetic pathways,.and other contents. | 16 Amines Key Questions What Are amines? How Do We Name Amines? What Are the Physical Properties of Amines? Image not available due to copyright restrictions How Do We Describe the Basicity of Amines? What Are the Characteristic Reactions of Amines? What Are Amines? Carbon, hydrogen, and oxygen are the three most common elements in organic compounds. Because of the wide distribution of amines in the biological world, nitrogen is the fourth most common element of organic compounds. The most important chemical property of amines is their basicity. Amines (Section ) are classified as primary (1°), secondary (2°), or tertiary (3°), depending on the number of carbon groups bonded to nitrogen. H CH3 CH3 9 NH2 CH3 9 N 9 CH3 CH3 9 N 9 CH3 Methylamine (a 1° amine) Dimethylamine (a 2° amine) Trimethylamine (a 3° amine) Online homework for this chapter may be assigned in GOB OWL. 442 ■ Chapter 16 Amines Chemical Connections 16A Amphetamines (Pep Pills) Amphetamine, methamphetamine, and phentermine—all synthetic amines—are powerful stimulants of the central nervous system. Like most other amines, they are stored and administered as their salts. The sulfate salt of amphetamine is named Benzedrine, the hydrochloride salt of the S enantiomer of methamphetamine is named Methedrine, and the hydrochloride salt of phentermine is named Fastin. These three amines have similar physiological effects and are referred to by the general name amphetamines. Structurally, they have in common a benzene ring with a three-carbon side chain and an amine nitrogen on the second carbon of the side chain. Physiologically, they share an ability to reduce fatigue and diminish hunger H N NH2 Amphetamine (Benzedrine) by raising the glucose level of the blood. Because of these properties, amphetamines are widely prescribed to counter mild depression, reduce hyperactivity in children, and suppress appetite in people who are trying to lose .
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