EBK ORGANIC CHEMISTRY
8th Edition
ISBN: 8220102744127
Author: Bruice
Publisher: PEARSON
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Chapter 18, Problem 74P
Friedel-Crafts alkylations can be carried out with carbocations formed from reactions other than the reaction of an
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Friedel–Crafts alkylations can be carried out with carbocations formed from reactions other than the reaction of an alkyl halide with AlCl3. Propose a mechanism for the following reaction:
The carbocation electrophile in a Friedel-Crafts reaction can be gener-
ated by an alternate means than reaction of an alkyl chloride with
AlCl3. For example, reaction of benzene with 2-methylpropene in the
presence of H3PO4 yields tert-butylbenzene. Propose a mechanism for
this reaction.
+
The reaction of an alkene with diazomethane forms a cyclopropane ring. Propose a mechanism for the reaction.
Chapter 18 Solutions
EBK ORGANIC CHEMISTRY
Ch. 18.1 - Draw the structure for each of the following: a....Ch. 18.3 - Why does hydration inactivate FeBr3?Ch. 18.6 - Prob. 4PCh. 18.7 - What is the major product of a Friedel-Crafts...Ch. 18.9 - Describe two ways to prepare each of the following...Ch. 18.10 - Prob. 7PCh. 18.11 - Name the following:Ch. 18.11 - Draw a structure for each of the following: a....Ch. 18.11 - Draw the structure for each of the following: a....Ch. 18.11 - Correct the following incorrect names: a....
Ch. 18.12 - Prob. 14PCh. 18.12 - List the compounds in each set from most reactive...Ch. 18.13 - Prob. 16PCh. 18.13 - What product(s) result from nitration of each of...Ch. 18.13 - Prob. 18PCh. 18.13 - What products are obtained from the reaction of...Ch. 18.15 - Give the products, if any, of each of the...Ch. 18.16 - a. Does a coupling reaction have to be used to...Ch. 18.16 - Show how the following compounds can be...Ch. 18.16 - Prob. 24PCh. 18.17 - What is the major product(s) of each of the...Ch. 18.17 - Prob. 26PCh. 18.18 - Why isn't FeBr3 used as a catalyst in the first...Ch. 18.18 - Prob. 29PCh. 18.18 - Write the sequence of steps required for the...Ch. 18.18 - Show how the following compounds can be...Ch. 18.19 - What product is formed from reaction of...Ch. 18.19 - Prob. 33PCh. 18.19 - Draw the structure of the activated ring and the...Ch. 18.20 - Prob. 35PCh. 18.20 - Prob. 36PCh. 18.20 - Diazomethane can be used to convert a carboxylic...Ch. 18.21 - Prob. 38PCh. 18.21 - Prob. 39PCh. 18.21 - Prob. 40PCh. 18.22 - Prob. 41PCh. 18 - Draw the structure for each of the following: a....Ch. 18 - Name the following:Ch. 18 - Prob. 44PCh. 18 - Prob. 45PCh. 18 - For each of the statements in Column I, choose a...Ch. 18 - What product is obtained from the reaction of...Ch. 18 - Draw the product(s) of each of the following...Ch. 18 - Rank the following substituted anilines from most...Ch. 18 - Prob. 50PCh. 18 - Prob. 51PCh. 18 - Show how the following compounds can be...Ch. 18 - Prob. 53PCh. 18 - The compound with the 1H NMR spectrum shown below...Ch. 18 - Rank each group of compounds from most reactive to...Ch. 18 - Prob. 56PCh. 18 - Prob. 57PCh. 18 - For each of the following components, indicate the...Ch. 18 - Prob. 59PCh. 18 - Prob. 60PCh. 18 - Describe two ways to prepare anisole from benzene.Ch. 18 - Prob. 62PCh. 18 - The following tertiary alkyl bromides undergo an...Ch. 18 - An aromatic hydrocarbon with a molecular formula...Ch. 18 - Show how the following compounds can be...Ch. 18 - Use the four compounds shown below to answer the...Ch. 18 - a. Rank the following esters from most reactive to...Ch. 18 - A mixture of 0.10 mol benzene and 0.10 mol...Ch. 18 - Prob. 69PCh. 18 - Prob. 70PCh. 18 - Benzene underwent a Friedel-Crafts acylation...Ch. 18 - Prob. 72PCh. 18 - Prob. 73PCh. 18 - Friedel-Crafts alkylations can be carried out with...Ch. 18 - Show how the following compounds can be prepared...Ch. 18 - Prob. 76PCh. 18 - Prob. 77PCh. 18 - a. Describe four ways the following reaction can...Ch. 18 - Propose a mechanism for each of the following...Ch. 18 - How can you prepare the following compounds with...Ch. 18 - Describe how naphthalene can he prepared from the...Ch. 18 - Using resonance contributors for the carbocation...Ch. 18 - Prob. 83PCh. 18 - What reagents are required to carry out the...Ch. 18 - Prob. 85PCh. 18 - Prob. 86PCh. 18 - Prob. 87PCh. 18 - Propose a mechanism for each of the following...Ch. 18 - P-Fluoronitrobenzene is more reactive toward...Ch. 18 - When heated with chromic acid, compound A forms...Ch. 18 - Show how the following compounds can be prepared...Ch. 18 - How can you distinguish the following compounds...Ch. 18 - Describe how mescaline can be synthesized from...Ch. 18 - Propose a mechanism for the following reaction...Ch. 18 - Propose a mechanism for each of the following...Ch. 18 - Describe how 3-methyl-1-phenyl-3-pentanol can he...Ch. 18 - An unknown compound reacts with ethyl chloride and...Ch. 18 - a. Explain why the following reaction leads to the...Ch. 18 - Explain why hydroxide ion catalyzes the reaction...Ch. 18 - Prob. 100PCh. 18 - Prob. 101PCh. 18 - a. How can aspirin be synthesized from benzene? b....Ch. 18 - Prob. 103PCh. 18 - Show how Novocain, a painkiller used frequently by...Ch. 18 - Prob. 105PCh. 18 - Saccharin, an artificial sweetener, is about 300...
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- Claisen rearrangement of an allyl phenyl ether with substituent groups in both ortho positions leads to the formation of a para-substituted product. Propose a mechanism for the following rearrangement.arrow_forwardKnoevenagel condensation is a reaction involving an active methylene compound (a CH2 flanked by two electron-withdrawing groups) and an aldehyde and ketone. Propose a mechanism for the reaction below.arrow_forwardAmines are converted into alkenes by a two-step process called Hofmann elimination. SN2 reaction of the amine with an excess of CH3I in the first step yields an intermediate that undergoes E2 reaction when treated with silver oxide as base. Pentylamine, for example, yields 1-pentene. Propose a structure for the intermediate, and explain why it readily undergoes elimination.arrow_forward
- Dihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesulfonic acid, ArSO3H. Propose a mechanism for this conversion.arrow_forwardThe Meerwein-Ponndorf-Verley reaction involves reduction of a ketone by treatment with an excess of aluminum triisopropoxide, [(CH3)2CHO]3Al. The mechanism of the process is closely related to the Cannizzaro reaction in that a hydride ion acts as a leaving group. Propose a mechanism.arrow_forwardIt is not uncommon for organic chemists to prepare acetals by an exchange-type process known as transacetalization. Predict the product(s) and show the mechanism for the transacetalization reactions below.arrow_forward
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