(a)
Interpretation:
The product formed when L-valine is treated the given set of reagents need to be predicted.
Concept introduction:
Esterification is a process in which a
(b)
Concept introduction:
Boc-protection of amino group in amino acids is an important reaction in peptide chemistry. This prevents the amino group from involving additional reactions forming by-products. The nitrogen atom of carbamate is less nucleophilic than the nitrogen atom of
- Nucleophilic attack to form tetrahedral intermediate
- Loss of leaving group to reform carbonyl
- Proton transfer to give protected amino acid
(c)
Concept introduction:
Amino acid has both acidic and basic group, namely carboxylic acid and amine group respectively. Deprotonation or protonation can occur depending upon the conditions. The carboxylic acid is deprotonated in basic condition and amine group is protonated at acidic conditions.
(d)
Concept introduction:
Amino acid has both acidic and basic group, namely carboxylic acid and amine group respectively. Deprotonation or protonation can occur depending upon the conditions. The carboxylic acid is deprotonated in basic condition and amine group is protonated at acidic conditions.

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Chapter 25 Solutions
ORGANIC CHEM PRINT STUDY GDE & SSM
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