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Chapter 23: Q25. (page 924)

Question:What ketones are prepared by the following reactions?

Short Answer

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Answers

The ketones prepared from the given reactions are shown below:-

Step by step solution

01

Acetoacetic ester synthesis

The acetoacetic ester synthesis is a method required for the conversion of ethyl acetoacetate into a ketone having one or two alkyl groups on the α - carbon.

02

Steps required in acetoacetic ester synthesis

It is a three-step process where an acid-base reaction takes place first followed by alkylation and the last step involves hydrolysis and deprotonation.

Reaction a

Reaction b

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Most popular questions from this chapter

Question: Both pentane-2,4-dione and ethyl acetoacetate have two carbonyl groups separated by a single carbon atom. Although an equilibrium mixture of pentane-2,4-dione tautomers contains 76% of the enol forms, an equilibrium mixture of ethyl acetoacetate tautomers contains only 8% of the enol forms. Suggest a reason for this difference.

Question: Which carbonyl compound in each pair exhibits the higher percentage of the enol tautomer?

Question: Why is the pKa of the Ha protons in 1-acetylcyclohexene higher than the pKaof the Hbprotons?

Question:Draw the organic products formed when 2-bromopentan-3-one ( CH3CH2COCHBrCH3) is treated with each reagent: (a) Li2CO3, LiBr, DMF; (b) CH3CH2NH2; (c) CH3SH.

Question: Synthesize each compound from diethyl malonate. You may use any other organic or inorganic reagents.
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