(a)
Interpretation:
The synthesis of acetoacetic ester can be used to prepare 5-phenyl-2,5-pentanedione has to be showed.
Concept Introduction:
Acetoacetic ester is a versatile starting material for the formation of new carbon-carbon bonds. It is because of the presence of acidic α-hydrogens between two carbonyl groups, the nucleophilicity of the enolate anion formed by the loss of α-hydrogen and the ability of the product to undergo decarboxylation after hydrolysis of ester.
(b)
Interpretation:
The synthesis of acetoacetic ester can be used to prepare 1-cyclopentyl-1-ethanone has to be showed.
Concept Introduction:
Acetoacetic ester is a versatile starting material for the formation of new carbon-carbon bonds. It is because of the presence of acidic α-hydrogens between two carbonyl groups, the nucleophilicity of the enolate anion formed by the loss of α-hydrogen and the ability of the product to undergo decarboxylation after hydrolysis of ester.
(c)
Interpretation:
The synthesis of acetoacetic ester can be used to prepare 3-ethyl-2-pentanone has to be showed.
Concept Introduction:
Acetoacetic ester is a versatile starting material for the formation of new carbon-carbon bonds. It is because of the presence of acidic α-hydrogens between two carbonyl groups, the nucleophilicity of the enolate anion formed by the loss of α-hydrogen and the ability of the product to undergo decarboxylation after hydrolysis of ester.
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Chapter 19 Solutions
Organic Chemistry
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