Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Question
Chapter 21.5, Problem 14P
Interpretation Introduction
Interpretation:
To explain the mechanism of the reaction between p-hydroxyaniline and acetic anhydride to prepare acetaminophen.
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In the 1880's, Acetanilide, sold under the name Antifebrin, was widely used as a pain reliever and fever reducer. However, it had
many adverse side effects, including cyanosis as a result of methemoglobinemia. The toxic side effects were the result of a small
portion of acetanilide being hydrolyzed to aniline. Acetanilide was discontinued and replaced with phenacetin. Later studies show
that both acetanilide and phenacetin are metabolized to acetaminophen. This metabolite, which we know as Tylenol, is responsible
for the analgesic and antipyretic properties.
Part 1: Show a detailed arrow pushing mechanism of the acid catalyzed hydrolysis of acetanilide to aniline
Part 2: Propose a synthesis of Acetaminophen from phenol
NH
NH
NH
Phenacetin
inophen
Acetanilide
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The analgesic acetaminophen is synthesized by treating 4-aminophenol with one equivalent of acetic anhydride. Draw a structural formula for acetaminophen.
When acetanilide is reacted
with bromine, para-bromo
acetanilide is produced
Chapter 21 Solutions
Organic Chemistry
Ch. 21.1 - Give IUPAC names for the following substances:Ch. 21.1 - Draw structures corresponding to the following...Ch. 21.2 - Prob. 3PCh. 21.2 - Rank the compounds in each of the following sets...Ch. 21.2 - Predict the products of the following nucleophilic...Ch. 21.2 - Prob. 6PCh. 21.3 - Prob. 7PCh. 21.3 - If the following molecule is treated with acid...Ch. 21.4 - How might you prepare the following esters using a...Ch. 21.4 - Prob. 10P
Ch. 21.4 - Prob. 11PCh. 21.4 - Prob. 12PCh. 21.4 - Prob. 13PCh. 21.5 - Prob. 14PCh. 21.5 - What product would you expect from reaction of one...Ch. 21.6 - Prob. 16PCh. 21.6 - Prob. 17PCh. 21.6 - Show the products you would obtain by reduction of...Ch. 21.6 - What ester and what Grignard reagent might you...Ch. 21.7 - Prob. 20PCh. 21.7 - How would you use the reaction of an amide with...Ch. 21.8 - Write the mechanism of the reaction shown in...Ch. 21.9 - Prob. 23PCh. 21.9 - Prob. 24PCh. 21.10 - Prob. 25PCh. 21.10 - Prob. 26PCh. 21.SE - Name the following compounds:Ch. 21.SE - Prob. 28VCCh. 21.SE - Prob. 29VCCh. 21.SE - Prob. 30VCCh. 21.SE - Predict the product(s) and provide the mechanism...Ch. 21.SE - Predict the product(s) and provide the mechanism...Ch. 21.SE - Predict the product(s) and provide the mechanism...Ch. 21.SE - Predict the product(s) and provide the complete...Ch. 21.SE - Prob. 35MPCh. 21.SE - When 4-dimethylaminopyridine (DMAP) is added in...Ch. 21.SE - Prob. 37MPCh. 21.SE - Prob. 38MPCh. 21.SE - Prob. 39MPCh. 21.SE - The hydrolysis of a biological thioester to the...Ch. 21.SE - Prob. 41MPCh. 21.SE - Prob. 42MPCh. 21.SE - Prob. 43MPCh. 21.SE - In the iodoform reaction, a triiodomethyl ketone...Ch. 21.SE - Give IUPAC names for the following compounds:Ch. 21.SE - Prob. 46APCh. 21.SE - Draw and name compounds that meet the following...Ch. 21.SE - Predict the product, if any, of reaction between...Ch. 21.SE - Prob. 49APCh. 21.SE - Prob. 50APCh. 21.SE - What product would you expect to obtain from...Ch. 21.SE - Prob. 52APCh. 21.SE - Prob. 53APCh. 21.SE - The following reactivity order has been found for...Ch. 21.SE - Prob. 55APCh. 21.SE - Outline methods for the preparation of...Ch. 21.SE - Prob. 57APCh. 21.SE - When ethyl benzoate is heated in methanol...Ch. 21.SE - tert-Butoxycarbonyl azide, a reagent used in...Ch. 21.SE - Prob. 60APCh. 21.SE - Prob. 61APCh. 21.SE - What is the structure of the polymer produced by...Ch. 21.SE - Polyimides with the structure shown are used as...Ch. 21.SE - Prob. 64APCh. 21.SE - Propose a structure for a compound, C4H7ClO2, that...Ch. 21.SE - Assign structures to compounds with the following...Ch. 21.SE - Prob. 67APCh. 21.SE - When a carboxylic acid is dissolved in...Ch. 21.SE - Prob. 69APCh. 21.SE - Prob. 70APCh. 21.SE - Prob. 71APCh. 21.SE - Phenyl 4-aminosalicylate is a drug used in the...Ch. 21.SE - N,N-Diethyl-m-toluamide (DEET) is the active...Ch. 21.SE - Tranexamic acid, a drug useful against blood...Ch. 21.SE - One frequently used method for preparing methyl...Ch. 21.SE - Prob. 76APCh. 21.SE - Assign structures to compounds with the following...Ch. 21.SE - Propose structures for compounds with the...Ch. 21.SE - Propose a structure for the compound with the...Ch. 21.SE - Draw the structure of the compound that produced...Ch. 21.SE - Prob. 81APCh. 21.SE - Epoxy adhesives are prepared in two steps. SN2...
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- How imines and enamines are converted back to carbonyl compounds by hydrolysis with mild acid ?arrow_forwardWhat chemical test will you use to differentiate acetanilide from aniline?arrow_forwardPredict the products formed when cyclohexanone reacts with the following reagents.phenylhydrazine and weak acidarrow_forward
- Can pyridine form a diazonium salt and can quinoline and isoquinoline undergo electrophilic substitution on the benzenoid ring but nucleophilic substitution on the nitrogen ring?arrow_forwardWrite the mechanisms for the following reactions: Decanoic acid + Ethyl alcohol Propanoic acid + Ethyl alcohol Salicylic acid + Benzyl alcohol Decanoic acid + 3-methyl-1-butanolarrow_forwardhow to prepare phenylmethanamine from benzene ?arrow_forward
- Balanced equation of the synthesis of SULFANILAMIDE from Acetanilide → p-Acetamidobenzenesulfonyl chloride → p-Acetamidobenzenesulfonamidearrow_forwardPredict the NMR spectra of Acetanilide, p-acetamidobenzene sulphonamide and p-aminobenzene sulphonamidearrow_forwardwrite the mechanism for a decarboxylation and state the structural features necessary for a decarboxylation.arrow_forward
- Why do you wash the dichloromethane solution of your reductive amination product with sodium bicarbonate, rather than dilute aqueous HCl? a) Sodium bicarbonate is a good method of removing aldehydes from organic solvent.b) The amine product will be protonated by acid and remain in the aqueous layer as a salt.c) Sodium bicarbonate transfers the amine starting material into the aqueous layer.d) Sodium bicarbonate reacts with leftover NaBH(OAc)3 and removes it from the mixture.arrow_forwardDraw the products obtained when benzoic acid reacts with NaOH and subsequently with ethyl iodide.arrow_forward17-35 Suppose that you take a bottle of benzaldehyde (a liquid, bp 179°C) from a shelf and find a white solid in the bottom of the bottle. The solid turns litmus red; that is, it is acidic. Yet aldehydes are neutral compounds. How can you explain these observations?arrow_forward
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