Question 8 An acetoacetic ester synthesis of a ketone proceeds by alkylation of the enolate of the acetoacetic ester followed by ester hydrolysis and decarboxylation of the B-ketoacid. Which of the following methyl ketones is difficult to prepare by this method? CH3CCH2C(CH3)3 CHỊCH,PH CH3CH2CH2Ph a) O b) о c) O d) CH₂CCH2CH2CH=CH2 -CH=CH2 о CH3CCH(CH₂Ph)2 Question 9 A malonic ester synthesis of a carboxylic acid proceeds by alkylation of the enolate of the malonic ester followed by ester hydrolysis and decarboxylation of the B-dicarboxylic acid. Which of the following carboxylic acids is difficult to prepare by this method? O a) PhCH2CH2CO₂H O b) (CH3)2CHCO₂H O c) PhCH2CO₂H CO₂H d) Question 10 a