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Chapter 29: Q5P (page 1157)

Whatα-halo carbonyl compoundis needed to synthesize each amino acid?

(a) Glycine

(b) Isoleucine

(c) Phenylalanine

Short Answer

Expert verified

Answer

a.

b.

c.

Step by step solution

01

Step  1: α-halocarbonyl compound

α-halo carbonyl compound are compound that contain keto-group or α-halogen substitute in a carbonyl group. α-halo carbonyl compound acts as alkylating agents.

02

Step 2:Amino acids

Amino acids are classified as organic molecules that are accountable for protein formation when combined. It has carbonyl (acidic) and amino (basic) groups with a side (-R) chain.

03

Reaction

(a) When bromoacetic acid is treated with NH3in excess amount, it forms glycine.

Formation of glycine

b. When C9H9O2Br is treated with NH3in excess amount, it forms isoleucine

(c) When 6-bromohexanoic acid is treated with NH3in excess amount, it forms phenylalanine.

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Most popular questions from this chapter

Give the amino acid sequence of an octapeptide that contains the amino acids Tyr, Ala, Leu (2 equiv), Cys, Gly, Glu and Val, and forms the following fragments when partially hydrolyzed with HCl: Val-Cys-Gly-Glu, Ala-Leu-Tyr, and Tyr-Leu-Val-Cys.

For the tetra peptide Asp–Arg–Val–Tyr:

a. Name the peptide using one-letter abbreviations.

b. Draw the structure.

c. Label all amide bonds.

d. Label the N-terminal and C-terminal amino acids

What types of stabilizing interactions exist between each of the following pairs of amino acids?

a. Ser and Tyr

b. Val and Leu

c. two Phe residues

What aldehyde is needed to synthesize each amino acid by the Strecker synthesis?

(a) Valine;

(b) Leucine;

(c) Phenylalanine.

Devise a synthesis of the following dipeptide from amino acid starting materials.
See all solutions

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