Concept explainers
(a)
Interpretation:
Reaction mechanism has to be proposed for the given reaction.
Concept introduction: A cyclic acetal is formed on a combination of an
(b)
Interpretation:
Reaction mechanism has to be proposed for the given reaction.
Concept introduction: Nucleophile
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Organic Chemistry, Books A La Carte Edition (8th Edition)
- The 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_forwardShow the products you would obtain by acid-catalyzed reaction of cyclohexanone with ethylamine, CH3CH2NH2, and with diethylamine, (CH3CH2) 2NH.arrow_forwardIf methanol rather than water is added at the end of a Hell-Volhard-Zelinskii reaction, an ester rather than an acid is produced. Show how you would carry out the following transformation, and propose a mechanism for the ester-forming step.arrow_forward
- Treatment of p-tert-butylphenol with a strong acid such as H2SO4 yields phenol and 2-methylpropene. Propose a mechanism.arrow_forwardTreatment of 1-aminoadamantane, C10H17N, with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and gives compound A. Propose a structural formula for compound A.arrow_forwardPropose a structure for the product with formula C9H17N that results when 2-(2-cyanoethyl)cyclohexanone is reduced catalytically.arrow_forward
- Knoevenagel 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_forwardSolvolysis of the following bicyclic compound in acetic acid gives a mixture of products, two of which are shown. The leaving group is the anion of a sulfonic acid, ArSO3H. A sulfonic acid is a strong acid, and its anion, ArSO3, is a weak base and a good leaving group. Propose a mechanism for this reaction.arrow_forwardAcid-catalyzed hydrolysis of the following epoxide gives a trans diol. Of the two possible trans diols, only one is formed. How do you account for this stereoselectivity?arrow_forward
- Following are the steps in one of the several published syntheses of frontalin, a pheromone of the western pine beetle. (a) Propose reagents for Steps 18. (b) Propose a mechanism for the cyclization of the ketodiol from Step 8 to frontalin.arrow_forwardPropose a mechanism for the following reactionsarrow_forwardpropose a mechanism for the following transformationsarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning