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Chapter 19: Q53E (page 648)

The Wharton reaction converts an epoxy ketone to an allylic alcohol by reaction with hydrazine. Propose a mechanism. (Hint: Review the Wolff鈥揔ishner reaction in Section 19-9.)

Short Answer

Expert verified

Wharton reaction is the reaction that involves the reduction of 伪,尾 unsaturated epoxy ketones into allylic alcohols.

We know that the Epoxidation of 伪,尾 unsaturated ketones is done by hydrogen peroxide in a basic medium. In this reaction, further hydrazine is added to get the resultant product.

Step by step solution

01

Wharton reaction

Wharton reaction is the reaction that involves the reduction of 伪,尾 unsaturated epoxy ketones into allylic alcohols.

We know that the Epoxidation of 伪,尾 unsaturated ketones is done by hydrogen peroxide in a basic medium. In this reaction, further hydrazine is added to get the resultant product.

02

Mechanism of the reaction

First, the nitrogen lone pair of hydrazine open the epoxide ring. Further rearrangements take place and nitrogen gas is lost as the reaction is proceed.

The mechanism of the reaction is as shown below;

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