Numerade

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ANSWERED

George Bennett

Numerade educator

Perform a retrosynthetic analysis by working backwards two steps in the given synthesis. Identify possible combinations of A and B that can lead to the compound shown (C). OH OH + enantiomer ? B ? A I II III IV V VI VII VIII B = I and A = VI B = V and A = II B = IV and A = VII B = I and A = III B = VIII and A = V

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ANSWERED

George Bennett

Numerade educator

Starting with acetylene as your only source of carbon atoms, identify how you would prepare the following aldehyde: CH3CH2CH2CHO Part 1 Acetylene can be converted to the given aldehyde by using some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A 1) O3; 2) DMS B 1) R2BH; 2) H2O2, NaOH C H2, Pt D H2, Lindlar's cat. E t-BuOK F NaNH2 G CH3CH2Br H H2SO4, H2O, HgSO4 I MeONa

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ANSWERED

Henry R

Numerade educator

Starting with acetylene as your only source of carbon atoms, identify how you would prepare the following aldehyde: CH3CHO 1) H2, Lindlar's cat. 2) O3 3) DMS H2SO4, H2O, HgSO4 1) O3 2) H2O 1) HBr (1 equiv.) 2) NaOH

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ANSWERED

Henry R

Numerade educator

What is the expected major final product of the reaction sequence shown? HC?CH 1. NaNH2 2. (cyclobutyl)CH2Br 3. NaNH2 4. (t-butyl)CH2Br I II III IV I II III IV None of the shown products will be produced.

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George Bennett

Numerade educator

Compound A is an alkyne with the molecular formula C5H8. When treated with aqueous sulfuric acid and mercuric sulfate, two different products with the molecular formula C5H10O are obtained in equal amounts. Draw the structure of compound A.

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ANSWERED

George Bennett

Numerade educator

An alkyne with molecular formula C4H6 was treated with ozone followed by water to produce a carboxylic acid and carbon dioxide. Draw the expected product when the alkyne is treated with aqueous acid in the presence of mercuric sulfate.

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ANSWERED

George Bennett

Numerade educator

An alkyne with the molecular formula C6H10 was treated with ozone followed by water, and a single carboxylic acid was isolated as the only product. Draw the structure of the starting alkyne and the product of ozonolysis. Draw the structure of the starting alkyne. Draw the structure of the product of ozonolysis.

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Henry R

Numerade educator

What is the structure of the expected major product for the reaction shown? excess Br2 / CCl4 I II III IV V I II III IV V

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ANSWERED

Henry R

Numerade educator

What functional group would be expected to be present in the final product of the reaction between 1-hexyne and a mixture of mercuric sulfate and aqueous sulfuric acid? aldehyde ketone diol ether carboxylic acid

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ANSWERED

Henry R

Numerade educator

For the reaction shown, which of the compounds listed would be the expected enol intermediate? H2O, H2SO4 / HgSO4 I II III IV V I II III IV V

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