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Provide a mechanism for the next reaction

Question:

Provide a mechanism for the next reaction

1,4-Addition Reaction:

Let us assume that a nucleophile is allowed to react with a {eq}\alpha, \beta {/eq} unsaturated carbonyl compound. The nucleophile will attack on the {eq}\alpha {/eq} carbon atom of the {eq}\alpha, \beta {/eq} unsaturated carbonyl compound only when the nucleophile is soft in nature. Such reation is said to be 1,4-Nucleophilic addition reaction.

Answer and Explanation:

The structure of the product and the mechanism for the formation of the product is shown below


The first step of the reaction involves the abstraction of the acidic proton by the ethoxide ion to give the enolate ion. The carbon atom of the enolate ion will attack nucleophilically on the electrophilic carbon atom of {eq}\alpha, \beta {/eq} unsaturated carbonyl compound to give the product.


Learn more about this topic:

Nucleophilic Addition Reactions of Aldehydes & Ketones
Nucleophilic Addition Reactions of Aldehydes & Ketones

from Chemistry 304: Organic Chemistry II

Chapter 2 / Lesson 9
9.4K

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