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Chapter 27: Q 51. (page 1103)

Question: Draw the product formed (including stereochemistry) in each pericyclic reaction.

Short Answer

Expert verified

Answer

Product of b

Step by step solution

01

Pericyclic reactions  

These reactions occur via a cyclic neutral concerted pathway. These reactions take place via the periphery of the conjugated polyene molecules.

02

Characteristics of pericyclic reactions  

These reactions take place via a cyclic transition state. These reactions are highly stereoselective. These reactions occur either via heat or light.

03

Products of the given reaction

a. The product of the given reaction is given hereunder.

Product of a.

b. The product of the given reaction is shown hereunder.

Product of b.

c. The product of the given reaction is shown hereunder.

Product of c.

d. The product of the given reaction is shown hereunder.

Product of d.

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Most popular questions from this chapter

Question: What compound forms geranial (Figure 21.6) by a Cope rearrangement ?

Question:Show that a thermal suprafacial addition is symmetry allowed in a [4 + 2] cycloaddition by using the HOMO of the alkene and the LUMO of the diene.

Question: Heating A results in two successive [3,3] sigmatropic rearrangements—Claisen reaction followed by Cope reaction—to afford β-Sinensal, a component of mandarin orange oil. What is the structure of β-sinensal?

Question: Classify each reaction as an electrocyclic reaction, a cycloaddition, or a sigmatropic rearrangement. Label the σ bonds that are broken or formed in each reaction.

Question: Draw a stepwise, detailed mechanism for the following reaction.
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