Formation of product should be identified when the β-D-allopyranose is treated with excess CH 3 I in Ag 2 O, acetic anhydride in pyridine and methanol in HCl. Concept introduction: Williamson Ether Synthesis : Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis. Methylation : carbohydrates methylated by using methyl iodide and silver oxide. Acetylation : carbohydrates acetylated by using acetic anhydride in pyridine. Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

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Answer 1

Question

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

Expert Solution & Answer

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Answer 2

Question

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

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Answer 3

Question

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

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Answer 4

Question

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

Expert Solution & Answer

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Answer 5

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

Answer 6

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

Answer 7

Chapter 24, Problem 57PP

(a)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

Answer 8

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

Answer 9

(b)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with acetic anhydride in pyridine.

Answer 10

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

Answer 11

(c)

Interpretation Introduction

Interpretation:

Formation of product should be identified when the β-D-allopyranose is treated with excess CH₃I in Ag₂O, acetic anhydride in pyridine and methanol in HCl.

Concept introduction:

Williamson Ether Synthesis: Alcohols reacts with alkyl halide forms ether is called Williamson ether synthesis.

Methylation: carbohydrates methylated by using methyl iodide and silver oxide.

Acetylation: carbohydrates acetylated by using acetic anhydride in pyridine.

Glycoside formation: carbohydrates react with an alcohol in acid which produce both anomers acetals are formed, if alkoxy group points down then it is α, alkoxy group points up then it is β.

To find: Formation of product when the β-D-allopyranose is treated with methanol in HCl

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 24.2 - Prob. 1CC Ch. 24.2 - Prob. 2CC Ch. 24.2 - Prob. 3CC Ch. 24.2 - Prob. 4CC Ch. 24.2 - Prob. 5CC Ch. 24.2 - Prob. 6CC Ch. 24.4 - Prob. 7CC Ch. 24.4 - Prob. 8CC Ch. 24.5 - Prob. 1LTS Ch. 24.5 - Prob. 9PTS

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Chapter 24 Solutions