To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled. Concept Introduction: The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside. The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

Question

16. The proton NMR spectral information shown in this problem is for a compound with formula CioH,N. Expansions are shown for the region from 8.7 to 7.0 ppm. The normal carbon-13 spec- tral results, including DEPT-135 and DEPT-90 results, are tabulated: 7 J Normal Carbon DEPT-135 DEPT-90 19 ppm Positive No peak 122 Positive Positive cus и 124 Positive Positive 126 Positive Positive 128 No peak No peak 4° 129 Positive Positive 130 Positive Positive (144 No peak No peak 148 No peak No peak 150 Positive Positive してし

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

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16. The proton NMR spectral information shown in this problem is for a compound with formula CioH,N. Expansions are shown for the region from 8.7 to 7.0 ppm. The normal carbon-13 spec- tral results, including DEPT-135 and DEPT-90 results, are tabulated: 7 J Normal Carbon DEPT-135 DEPT-90 19 ppm Positive No peak 122 Positive Positive cus и 124 Positive Positive 126 Positive Positive 128 No peak No peak 4° 129 Positive Positive 130 Positive Positive (144 No peak No peak 148 No peak No peak 150 Positive Positive してし

3. Propose a synthesis for the following transformation. Do not draw an arrow-pushing mechanism below, but make sure to draw the product of each proposed step (3 points). + En CN CN

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Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 25.3, Problem 25.4P

Interpretation Introduction

Interpretation:

To methyl α-D-mannopyranoside (methyl α-D-mannoside), Haworth projection and chair conformations has to be given and the anomeric carbon and the glycosidic bond has to be labelled.

Concept Introduction:

The aldehydes or ketones reacts with alcohol to form cyclic hemiacetal. If hemiacetal reacts with another alcohol molecule it forms acetal. Acetal is also known as glycoside.

The bond formed between the anomeric carbon and the alcohol molecule is said to be glycosidic bond.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 25.3, Problem 25.4P

Interpretation Introduction