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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

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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 ‘Heck reaction.’

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

Draw the product formed from the ring-closing metathesis of each compound. Then, devisea synthesis of each metathesis starting material using any of the following compounds: CH2(CO2Et)2, alcohols with less than five carbons, and any needed organic and inorganicreagents.

a.

b.

Devise a synthesis of each compound from benzene. You may also use any organic compounds having four carbons or fewer, and any required inorganic reagents.

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b.

What product is formed in the Suzuki coupling of A and B? This reaction was a key step in the synthesis of losartan, a drug used to treat hypertension.

Devise a synthesis of each compound using a Heck reaction as one step. You may use benzene, CH2=CHCO2Et, organic alcohols having two carbons or fewer and any required inorganic reagents.

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Identify X, an intermediate that was converted to eletriptan (trade name Relpax), a drug used to treat migraines.
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