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Chapter 9: Q40P (page 495)

Show how you would convert the following starting materials into the target compound. You may use any additional reagents you need.

Short Answer

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Multistep synthesis forms an important part of organic reactions. It is a reaction where the starting material is transformed into a final product through several reactions.

Step by step solution

01

Multistep synthesis

Multistep synthesis forms an important part of organic reactions. It is a reaction where the starting material is transformed into a final product through several reactions.

02

Reaction of alkynes

Alkynes undergo several reactions, and one among those is the deprotonation. The deprotonation of alkynes gives rise to alkynes when sodium amide is used as a reagent.

03

Conversion of the following starting materials into the target compound

Benzyl bromide reacts with acetylene in the presence of sodium amide to form an anion. The reaction can be given as:

The generated anion reacts with the carbonyl group of the aldehyde, followed by acid-catalyzed dehydration in the presence of sulphuric acid and heat. This is followed by the incorporation of meta-chloroperoxybenzoic acid (mCPBA) to create the target molecule. The reaction can be given as:

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Most popular questions from this chapter

Oxidative cleavages can help to determine the positions of the triple bonds in alkynes.

(a) An unknown alkyne undergoes oxidative cleavage to give adipic acid and two equivalents of acetic acid. Propose a structure for the alkyne.

(b) An unknown alkyne undergoes oxidative cleavage to give the following triacid plus one equivalent of propionic acid. Propose a structure for the alkyne.

Using any necessary inorganic reagents, show how you would convert acetylene and isobutylbromide to

(a)meso-2,7-dimethyloctane-4,5-diol,(CH3)2CHCH2CH(OH)CH(OH)CH2CH(CH3)2 .

(b) (卤 ) -2,7-dimethyloctane-4,5-diol

Propose a mechanism for the entire reaction of pent-1-yne with 2 moles of HBr. Show why Markovnikov鈥檚 rule should be observed in both the first and second additions of HBr.

When compound Z is treated with ozone, followed by dimethyl sulfide and washing with water, the products are formic acid, 3-oxobutanoic acid, and hexanal.

Propose a structure for compound Z. What uncertainty is there in the structure you have proposed?

In the addition of just 1 mole of bromine to 1 mole of hept-1-yne, should the hept-1-yne be added to a bromine solution or should the bromine be added to the hept-1-yne? Explain your answer.
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