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Chapter 26: Q 7. (page 1057)

Draw the coupling product formed when each pair of compounds is treated with Pd(OAc)2, P(o-tolyl)3, and Et3N.

Short Answer

Expert verified

Answer

a.

b.

c.

d.

Step by step solution

01

Heck reaction

The organic reaction involving the coupling of an aryl or vinyl halide with an alkene catalyzed by palladium to form an alkene with a new C-C bond is known as the 鈥楬eck reaction.鈥�

The reaction occur in the presence of a catalyst such as palladium (II), acetate in the presence of triaryl phosphine, and a base such as triethylamine.

02

Products

The following products are formed in the given reactions:

a.

Coupling product of a.

b.

Coupling product of b.

c.

Coupling product of c.

d.

Coupling product of d.

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Most popular questions from this chapter

Many variations of ring-closing metathesis have now been reported. Tandem ring-opening鈥� ring-closing metathesis can occur with cyclic alkenes that contain two additional carbon鈥� carbon double bonds. In this reaction, the cycloalkene is cleaved, and two new rings are formed. [1] What compounds are formed in this tandem reaction with the following substrates? [2] Devise a synthesis of the substrate in part (b) that uses a Diels鈥揂lder reaction with diethyl maleate as the dienophile.

a.

b.

Draw the product of each reaction.

What product is formed by ring-closing metathesis of each compound?

a.

b.

What product is formed by ring-closing metathesis of each compound?

a.

b.

Dimethyl cyclopropanes can be prepared by the reaction of an 伪, 尾-unsaturated carbonyl compound X with two equivalents of a Wittig reagent Y. Draw a stepwise mechanism for this reaction.
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