Chapter 26, Problem 26.46AP

Interpretation Introduction

(a)

Interpretation:

The curved arrow mechanism for the synthesis of dehydroserine imine of pyridoxal phosphate A from the reaction of pyridoxal phosphate and serine is to be stated.

Concept introduction:

Pyridoxal phosphate is a coenzyme which is an active form of the vitamin ${\text{B}}_{\text{6}}$. Its role is to stabilize the various carbanionic reaction intermediates. It is used as a coenzyme in deamination, racemization, decarboxylation reaction.

Interpretation Introduction

(b)

Interpretation:

The carbocation character of red carbon in structure A with the help of the resonance structure is to be shown.

Concept introduction:

Most of the organic structures cannot be represented using a single Lewis structure. Therefore, there exists more than one Lewis structure for representing a molecule or ion. These structures are known as resonance structures. The delocalization of electrons results in the formation of resonance structure.

Interpretation Introduction

(c)

Interpretation:

The curved arrow mechanism for the biosynthesis of tryptophan is to be stated.

Concept introduction:

The carboxylic acid compounds containing amine group with it are known as amino acids. The chemical compounds in which carbon is bonded to the acidic and basic group along with hydrocarbon side chain are known as amino acids. The amino acids are classified into acidic, basic, polar, non-polar, essential, and non-essential categories. Tryptophan amino acid contains indole moiety with the basic unit of amino acid.