For the given Boc-protection of phenylalanine, a mechanism needs to be drawn. 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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are, Nucleophilic attack to form tetrahedral intermediate Loss of leaving group to reform carbonyl Proton transfer to give protected amino acid

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Answer 1

Question

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

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Answer 2

Question

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

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Answer 3

Question

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

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Answer 4

Question

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

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Answer 5

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

Answer 6

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

Answer 7

Chapter 25, Problem 83PP

Interpretation Introduction

Interpretation:

For the given Boc-protection of phenylalanine, a mechanism needs to be drawn.

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 amine because its lone pair is delocalized by the neighboring carboxyl group. Boc-protection can be done by reaction of amino acid with d-tert-butyl dicarbonate. The steps involved in Boc-protection of amino acid are,

Nucleophilic attack to form tetrahedral intermediate

Loss of leaving group to reform carbonyl

Proton transfer to give protected amino acid

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 25.2 - Prob. 1CC Ch. 25.2 - Prob. 2CC Ch. 25.2 - Prob. 3CC Ch. 25.2 - Prob. 1LTS Ch. 25.2 - Prob. 4PTS Ch. 25.2 - Prob. 7CC Ch. 25.2 - Prob. 8CC Ch. 25.2 - Prob. 9CC Ch. 25.2 - Prob. 10CC Ch. 25.2 - Prob. 11CC

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Chapter 25 Solutions