Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 18.60P
Interpretation Introduction
Interpretation:
The mechanism for the reaction of an isocyanate with an alcohol to form a urethane has to be proposed.
Concept introduction:
Urethanes:
By treationg an isocyanate with an alcohol or a phenol, urethanes can be made.
The formation of urethane is an exothermic reaction and a quantifiable yield of a carbamate ester is produced.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Acetal derivatives of aldehydes and ketones are prepared by an acid-catalyzed dehydration reaction with alcohols or diols. Using more pictures than words, draw a reaction and a mechanism that shows the formation of acetal.
Draw out the reaction mechanism for cyclohexanol to cyclohexanone. Sodium hypochlorite oxidation of an alcohol to a ketone with the product being cyclohexanone.
A vicinal diol has OH groups on adjacent carbons. The dehydration of a vicinal diol is accompanied by a rearrangement called the pinacol rearrangement. Propose a mechanism for this reaction.
Chapter 18 Solutions
Organic Chemistry
Ch. 18.1 - Prob. 18.1PCh. 18.2 - Prob. 18.2PCh. 18.4 - Prob. 18.3PCh. 18.4 - Prob. 18.4PCh. 18.4 - Synthesis of nitriles by nucleophilic displacement...Ch. 18.5 - Complete the following transesterification...Ch. 18.6 - Complete and balance equations for the following...Ch. 18.8 - Prob. AQCh. 18.8 - Several compounds have been found to inhibit...Ch. 18.8 - Prob. CQ
Ch. 18.8 - The following sequence of steps is used to create...Ch. 18.9 - Prob. 18.8PCh. 18.9 - Prob. 18.9PCh. 18.10 - Prob. 18.10PCh. 18.10 - Show how to convert (R)-2-phenylpropanoic acid to...Ch. 18 - Prob. 18.12PCh. 18 - Write the IUPAC name for each compound. (a)...Ch. 18 - Prob. 18.14PCh. 18 - Prob. 18.15PCh. 18 - Propose a structural formula for compound A,...Ch. 18 - Propose a structural formula for compound B,...Ch. 18 - Propose a structural formula for each compound...Ch. 18 - Draw a structural formula for the principal...Ch. 18 - Prob. 18.20PCh. 18 - Prob. 18.21PCh. 18 - Prob. 18.22PCh. 18 - Prob. 18.23PCh. 18 - Prob. 18.24PCh. 18 - Show the product expected when the following...Ch. 18 - The reagent diisobutylaluminum hydride (DIBALH)...Ch. 18 - Prob. 18.27PCh. 18 - Prob. 18.28PCh. 18 - Prob. 18.29PCh. 18 - Nicotinic acid, more commonly named niacin, is one...Ch. 18 - Prob. 18.31PCh. 18 - Prob. 18.32PCh. 18 - Prob. 18.33PCh. 18 - Prob. 18.34PCh. 18 - Prob. 18.35PCh. 18 - Isoniazid, a drug used to treat tuberculosis, is...Ch. 18 - Prob. 18.37PCh. 18 - A step in a synthesis of PGE1 (prostaglandin E1,...Ch. 18 - Prob. 18.39PCh. 18 - Prob. 18.40PCh. 18 - Show how to synthesize 5-nonanone from...Ch. 18 - Prob. 18.42PCh. 18 - The following sequence of steps converts...Ch. 18 - Prob. 18.44PCh. 18 - Prob. 18.45PCh. 18 - Prob. 18.46PCh. 18 - Prob. 18.47PCh. 18 - Following is a retrosynthetic analysis for the...Ch. 18 - Prob. 18.50PCh. 18 - Given this retrosynthetic analysis, propose a...Ch. 18 - Prob. 18.52PCh. 18 - Prob. 18.53PCh. 18 - Prob. 18.54PCh. 18 - In Problem 7.28, we saw this step in Johnsons...Ch. 18 - Prob. 18.56PCh. 18 - Prob. 18.57PCh. 18 - Prob. 18.58PCh. 18 - Prob. 18.59PCh. 18 - Prob. 18.60PCh. 18 - Prob. 18.61PCh. 18 - Prob. 18.62PCh. 18 - Using your reaction roadmap as a guide, show how...Ch. 18 - Using your reaction roadmap as a guide, show how...Ch. 18 - Using your reaction roadmap as a guide, show how...Ch. 18 - Using your reaction roadmap as a guide, show how...Ch. 18 - Minoxidil is a molecule that causes hair growth in...Ch. 18 - Prob. 18.69PCh. 18 - Prob. 18.70PCh. 18 - Prob. 18.71P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- When 4-hydroxybutanoic acid is treated with an acid catalyst, it forms a lactone (a cyclic ester). Draw the structural formula of this lactone and propose a mechanism for its formationarrow_forwardH NH₂ ཡིནྣཾ ༥ ཨ ཨནྡྷ༥ ༠ ཨི་ཝཱ, ཙ ཨ་ར༩ H NH3+ the acidity of the amine ion drives the reaction to shift toward the conjugate base of the carboxylic acid product. the resulting carboxylic acid ion is a weaker base than an acetate ion. O aldehydes are more reactive toward nucleophiles than ketones. Onucleophilic attack occurs preferentially at the less hindered carbon of the formyl group.arrow_forwardOne frequently used method for preparing methyl esters is by reaction of carboxylic acids with diazomethane, CH2N2. The reaction occurs in two steps: (l) protonation of diazomethane by the carboxylic acid to yield methyldiazonium ion, CH3N2+, plus a carboxylate ion; and (2) reaction of the carboxylate ion with CH3N2+. (a) Draw two resonance structures of diazomethane, and account for step 1. (b) What kind of reaction occurs in step 2?arrow_forward
- Following is the structural formula of the tranquilizer meparfynol (Oblivon). Propose a synthesis for this compound starting with acetylene and a ketone. (Notice the -yn- and -ol in the chemical name of this compound, indicating that it contains alkyne and hydroxyl functional groups.)arrow_forwardA problem often encountered in the oxidation of primary alcohols to acids is that esters are sometimes produced as by-products. For example, oxidation of ethanol yields acetic acid and ethyl acetate: Propose a mechanism to account for the formation of ethyl acetate. Take into account the reversible reaction between aldehydes and alcohols:arrow_forwardNonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.arrow_forward
- Which of the following reaction conditions can be used to synthesize an ester (RCOOR')? An acid halide and an amine in presence of a base (base catalyzed) An amide and an alcohol O A carboxylic acid and an alcohol in presence of a base (base catalyzed) A carboxylic acid and an alcohol in presence of an acid (acid catalyzed)arrow_forwardFollowing ester (methyl benzoate) was hydrolyzed in presence of an acid catalyst. This reaction produces --- and ---. OCH3 benzoic acid, ethanol benzoic acid, water acetic acid, benzene benzoic acid, methanolarrow_forwardDiazomethane can be used to convert a carboxylic acid to a methyl ester. Propose a mechanism for this reaction.arrow_forward
- Acetic acid has been mixed with isoamyl alcohol to produce isoamyl acetate giving off a banana smell. Propose a reaction mechanism for this reaction.arrow_forwardBenzene + nitration, followed by bromination, then reduction of the nitro group to an amine, followed by diazonization, addition of copper I cyanide to the reaction and the product is O benzoyl nitrile O ortho-bromoaniline O para-bromo-nitrobenzene O 3,5-dibromnobenzonitrile O para-bromobenzyl bromidearrow_forwardCan you draw the mechanism for the synthesis of cyclohexene from cyclohexanol through an acid-catalyzed dehydration reaction. Where Phosphoric acid donates a proton ((H^+)) to the hydroxyl group of cyclohexanol, forming a protonated cyclohexanol intermediate. • The protonated cyclohexanol undergoes dehydration, leading to the removal of a water molecule and the formation of cyclohexene. • The released proton combines with water to form hydronium ion (H3O+), regenerating the catalyst. The mechanism should illustrate the acid-catalyzed dehydration process, where phosphoric acid facilitates the removal of water from cyclohexanol, resulting in the formation of cyclohexene.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
Lipids - Fatty Acids, Triglycerides, Phospholipids, Terpenes, Waxes, Eicosanoids; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=7dmoH5dAvpY;License: Standard YouTube License, CC-BY