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Chapter 18: 29 P (page 711)

How could you use ethylbenzene to prepare each compound? More than one step is required.

Short Answer

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d)

Step by step solution

01

Significance of radical bromination of alkylbenzenes

Benzylic halides are formed as a result of the radical bromination of alkylbenzenes. Benzylic halides are useful as a starting material (reactant) in forming new substituted benzene products.

02

Synthesis using ethyl benzene

a. Bromination of benzylic bromide followed by elimination of HBr gives 2-bromostyrene.


b. Bromination of ethylbenzene followed by elimination of NaBr gives phenyl ethanol.


c. Epoxidation of styrene gives styrene oxide.


d. Hydroboration followed by oxidation of styrene forms phenyl ethyl alcohol.

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Most popular questions from this chapter

Rank the compounds in each group in order of increasing reactivity in electrophilic aromatic substitution: (a) C6H6,C6H5Cl,C6H5CHO; (b) C6H5CH3,C6H5NH2,C6H5CH2NH2.

In Step [2] of Mechanism 18.1, loss of a proton to form the substitution product was drawn using one resonance structure only. Use curved arrows to show how the other two resonance structures can be converted to the substitution product (PhE) by removal of a proton with: B.

Question: Draw a stepwise, detailed mechanism for the dienone鈥損henol rearrangement, a reaction that forms alkyl-substituted phenols from cyclohexadienones.

Draw all resonance structures for each compound and use the resonance structures to determine if the substituent has an electron-donating or electron-withdrawing resonance effect.

Classify each substituent as electron donating or electron withdrawing.
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