Concept explainers
(a)
Interpretation: The stereogenic center(s) is to be labeled.
Concept introduction: Stereoisomers are the compounds in which molecular formula of a compound remains same but positions of different atoms or groups are changed to form new compounds. The stereogenic centers are also known as sterocenters. The stereocenters are carbon atoms on which the interchanging of two atoms or groups results in the formation of new stereoisomers.
(b)
Interpretation: Amide(s) that can be reduced to form benzphetamine is to be predicted.
Concept introduction:
(c)
Interpretation: The carbonyl compound and amine that can be used to make benzphetamine by reductive amination are to be stated. The possible methods are to be drawn.
Concept introduction: Amines are the derivatives of ammonia consisting of nitrogen atom with the lone pair of electrons. They are basic compounds. The synthesis of the products relies upon the type of reactants and reagents that are used during the reactions. The energy of a target molecule should be low because it increases the stability of a molecule that results in the formation of molecules with high yield. The reagents perform numerous functions in reactions like proton abstraction, oxidation, reduction, catalysis, and dehydrogenation.
(d)
Interpretation: The products which are formed by Hofmann elimination from benzphetamine are to be drawn. The major product is to be labeled.
Concept introduction: Amines are the derivatives of ammonia consisting of nitrogen atom with the lone pair of electrons. They are basic compounds. Hoffman’s elimination reaction involves the less substituted alkene as a more favourable product, whereas according to Zaitsev rule, more substituted
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Chapter 25 Solutions
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