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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_forwardFollowing is a retrosynthesis for the coronary vasodilator ganglefene. (a) Propose a synthesis for ganglefene from 4-hydroxybenzoic acid and 3-methyl-3-buten-2-one. (b) Is ganglefene chiral? If so, which of the possible stereoisomers are formed in this synthesis?arrow_forwardDihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesulfonic acid, ArSO3H. Propose a mechanism for this conversion.arrow_forward
- Treatment 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_forwardAldehydes and ketones react with thiols to yield thioacetals just as they react with alcohols to yield acetals. Predict the product of the following reaction, and propose a mechanism:arrow_forwardThe first step in the metabolism of glycerol, formed by digestion of fats, is phosphorylation of the pro-R—CH2OH group by reaction with adenosine triphosphate (ATP) to give the corresponding glycerol phosphate plus adenosine diphosphate (ADP). Show the stereochemistry of the product.arrow_forward
- Can you help me understand how to approach this question and explain the mechanism?arrow_forward2305032118517 CHO H-C-OH H-C-OH H₂C₂OH CHO Ho-C-tt A D-aldotetrose yields a mixture of the two compounds shown below when subjected to Kiliani - Fischer Chain extension synthesis. What is the Structure of the aldotetrose? 3 CH₂OH Compound I H-C-OH CHO HO-C-H Ho C-H сно HO-C-H WOO Н-С-он H-C-OH CH ₂ OH Compound II CHO H² C-OH HO-C-H CH₂OH CH ₂ OH CH₂OH CA) (B) (D) (E) Both choices (B) and (C) could be the correct structure of D-erythrose. CHO H₂C-OH HC OH CH ₂ OH ctrl MAND optionarrow_forwardCh19-5: Which of the compounds is the intermediate called hemiacetal of the following reaction? 요 HO OH H₂SO (-H₂O) OH HO OH HO HOO O OH OHarrow_forward
- An acid-base reaction of (R)-sec-butylamine with a racemic mixture of 2-phenylpropanoic acid forms two products having different melting points and somewhat different solubilities. Draw the structure of these two products. Assign R and S to any stereogenic centers in the products. How are the two products related? Choose from enantiomers, diastereomers, constitutional isomers, or not isomers.arrow_forwardThe following compound has been found to be an inhibitor of penicillinase. The enzyme can be reactivated by hydroxylamine (NH2OH). Propose a mechanism to account for the inhibition and for the reactivation.arrow_forwardWhen the following compound is treated with the base sodium hydroxide (NaOH), an intramolecular 5, 2 reaction occurs. Please draw both the organic intermediate and the major organic product obtained. Be sure to include the correct stereochemistry and charges. ( OH D D taarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning