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Organic Chemistry
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- Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.arrow_forwardHow would you synthesize the following compounds from cyclohexanone? a) 1Methylcyclohexene b) 2Phenvlcyclohexanone c) cis1, 2Cyclohexanediol d) 1Cyclohexylcyclohexanolarrow_forwardIdentify A–J:arrow_forward
- Dihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesul- fonic acid, ARSO,H. Propose a mechanism for this conversion. ARSO,H OH + H,O Tetrahydrofurfuryl Dihydropyran alcoholarrow_forwardA key step in a synthesis of the antimalarial drug quinine involves an intramolecular nucleophilic substitution that converts A to B. Draw the structure of B and give the reagents needed to convert B to quinine.arrow_forwardTreatment of trans-2-chlorocyclohexanol with NaOH yields 1, 2-epoxy-cyclohexane, but reaction of the cis isomer under the same conditions yields cyclohexanone. Propose mechanisms for both reactions, and explain why the different results are obtained.arrow_forward
- Reaction of phenol with acetone in the presence of an acid catalyst gives a compound known as bisphenol A, which is used in the production of epoxy and polycarbonate resins Propose a mechanism for the formation of bisphenol A. OH H;PO, + H,O НО HO Phenol Acetone Bisphenol Aarrow_forwardThe 1H and 13C NMR spectra below belong to a compound with formula C6H10O2. Propose a structure for this compound.arrow_forwardA step in a synthesis of PGE1 (prostaglandin E1, alprostadil) is the reaction of a trisubstituted cyclohexene with bromine to form a bromolactone. Propose a mechanism for formation of this bromolactone and account for the observed stereochemistry of each substituent on the cyclohexane ring. Alprostadil is used as a temporary therapy for infants born with congenital heart defects that restrict pulmonary blood flow. It brings about dilation of the ductus arteriosus, which in turn increases blood flow in the lungs and blood oxygenation.arrow_forward
- Propose structures for alcohols that have the following 1HNMR spectra: (a) C5H12Oarrow_forwardDraw the structures of the organoboranes formed when borane reacts with each alkene below, including the regiochemistry and stereochemistry as appropriate. Propose a mechanism for each reaction.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_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning