A-2.Provide the correct structures of compoundsAthrough E in the following reaction sequences:(a)(b)A-3.Give a series of steps that will enable preparation of each of the following compounds fromthe starting material(s) given and any other necessary reagents:(a)(b)A-4.Write a stepwise mechanism for the reaction of ethyl propanoate with sodium ethoxide inethanol.A-5.Ethyl 2-methylpropanoate does not undergo a Claisen condensation, whereas ethyl 3-methylbutanoate does. Provide a mechanistic explanation for this observation.PART BB-1.Which of the following compounds is the strongest acid?(a)HCO2CH2CH3(b)CH3CH2O2CCH2CO2CH2CH3(c)CH3CH2O2CCH2CH2CO2CH2CH3(d)CH3CO2CH2CH3B-2.Which of the following will yield a ketone and carbon dioxide following saponi
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