Which alkyl halides were used in the acetoacetic ester synthesis to make the substituted ketone below? You may choose more than one answer. O CH3B1 CH3CH2CH2B. O CH3CH2Br O (CH3)2CHB
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- Acetals are formed from the reaction of two alcohols with a carbonyl under acidic conditions. Acetal formation is faster with 1,2-ethanediol than with two methanol molecules. Choose the factor that explains the difference in reaction rates. A) The reaction with 1,2-ethanediol has a lower AH (enthalpy) of reaction. B) The reaction with 1,2-ethanediol has a higher AH (enthalpy) of reaction. C) The reaction with 1,2-ethanediol has a more favorable entropy of reaction.Answer the following questions about curcumin, a yellow pigment isolated from turmeric, a tropical perennial in the ginger family and a principal ingredient in curry powder.a.In Chapter 11, we learned that most enols, compounds that contain a hydroxy group bonded to a C=C, are unstable and tautomerize to carbonyl groups. Draw the keto form of the enol of curcumin, and explain why the enol is more stable than many other enols. b.Explain why the enol O—H proton is more acidic than an alcohol O—H proton. c. Why is curcumin colored? d.Explain why curcumin is an antioxidant.Question 9 The reagent which converts a carbonyl group of a ketone into a enamine group is O CH3CH2CH2NHCH3; H CH3CH2CH2NH2; H* O CH3CH2CH2NHCH3; H3O* O CH3CH2CH2NH2; OH OLIAIH[OC(CH3)3]3
- H₂SO4, H₂O Choose the enol(s) that can be formed from the following oxymercration reaction. OH ОН OH HgSO4 ОНWhat product forms when the compound below is treated with Benedict's reagent? CHO H -C-OH CH,OH A) ÇH,OH H –Ç–OH CH,OH B) СНО C=0 CH,OH C) ÇOOH Н—С—ОН CH,OH D) ÇH,OH Но—ҫ—ОН CH,OH MacBook AirWhat is the role of phosphoric acid in the synthesis of cyclohexene? it is an antioxidant that prevents free radical side reactions it is a safe, non-toxic solvent it lowers the boiling point of the reaction mixture (a colligative property of adding phosphoric acid to water) it protonates the hydroxyl of cyclohexanol to make it a better leaving group
- Which of the following compounds will react with base to form an epoxide? он OH OH он Br A A B. U D. A А B. UD Br D. QUESTION 32 Which of the following compounds will react with base to form 4-tert-butylcyclohexanone? OH OH OH OH B Br B СО Br Br Br D Br Br2. There are two methods to convert an alkyl halide into a carboxylic acid containing one additional carbon atom: R-X R-X NaCN CH3CI Mg R-CN Br R-MgX H3O+ 1) CO₂ 2) H3O+ (CH3)3CCI i Depending on the structure of the alkyl halide, one or both of these methods may be used. For each alkyl halide shown, write out a stepwise mechanism that converts it to a carboxylic acid. If both methods work, draw both routes. If one method cannot be used, state why it cannot. HO R OH AiOH R OH BrSelect all of the compounds in the enol form of keto-enol tautomerism. он HC он H.C. H.C. H.C CH, CH, HC CH, HC a b d
- draw the reaction and the product(s) of the follwoing substitution reactions H₂C a CH₂ CH₂ Br NH₂ -CH₂ NOCH,CH.CH diethyl ether draw the reaction and the product(s) of the following elimination reactions CH.CH.CH.OH CH,CH,CH,OHA diethyl ether NaCH,CH, diethyl ether AComplete the following reaction sequence with the missing major organic products. CH, NaOH CH,CH,CH,CHCH,CHCH,CEN H20 NaOH H,0 CH,CH,Fluticasone is a glucocorticoid drug that has been used to treat asthma. In the synthesis of fluticasone, the following transformation is used that involves a limiting amount of sodium iodide. Analyze the structure using the chemistry you learned in this chapter and draw the product of the reaction. S. CH3 HO CH3 H CH3 Nal acetone H