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Chapter 24: Q.17. (page 962)

Question: What crossed Claisen product is formed from each pair of compounds?

a.

b.

Short Answer

Expert verified

Answer

a.

b.

Step by step solution

01

Crossed Claisen reaction

The Claisen reaction taking place between two non-identical esters or an ester and a ketone is referred to as the Crossed Claisen reaction.

02

Example of Crossed Claisen reaction

The Claisen reaction between a ketone and an ester is represented below:

Crossed Claisen Reaction

03

Crossed Claisen products formed from each pair

Enolate is formed from the compound containing alpha hydrogen.

a. The reaction between the two esters is shown below.

Claisen reaction of a.

b. The reaction between the given ketone and the ester is represented below.

Claisen reaction of b.

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Most popular questions from this chapter

Question: Draw the aldol product formed from each pair of starting materials using OH,H2O.

Question: Octinoxate is an unsaturated ester used as an active ingredient in sunscreens.(a) What carbonyl compounds are needed to synthesize this compound using a condensation reaction?(b) Devise a synthesis of octinoxate from the given organic starting materials and any other needed reagents.

Question: What product is formed when a solution of A and B is treated with mild base? This reaction is the first step in the synthesis of rosuvastatin (sold as a calcium salt under the trade name Crestor), a drug used to treat patients with high cholesterol.

Question: What 尾-keto ester is formed when each ester is used in a Claisen reaction?

Question: Identify the structures of C and D in the following reaction sequence.
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