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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: Use curved arrows and draw the product of each electrocyclic reaction.

Question: Show how the following starting material is converted to the given product by a series of two pericyclic reactions. Account for the observed stereochemistry.

Question: What type of cycloaddition occurs in Reaction [1]? Draw the product of a similar process in Reaction [2]. Would you predict that these reactions occur under thermal or photochemical conditions?

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

Question: What product is formed when each compound undergoes thermal electrocyclic ring opening or ring closure? Label each process as conrotatory or disrotatory and clearly indicate the stereochemistry around tetrahedral stereogenic centers and double bonds.
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