The product of a Diels-Alder reaction between 1,3-butadiene and diethyl acetylenedicarboxylate is to be determined. Concept Introduction: > Diels-Alder reaction is a concerted cycloaddition of an alkene , called a dienophile, to a (conjugated) diene. > Acetylene reacts in the same way as an alkene in a Diels-Alder reaction. One of its pi-bond pairs forms a bond with the end carbon of a diene. > The reaction requires that the diene must adopt an s-cis conformation, i.e., the two double bonds must be on the same side of the single bond separating them.

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Chapter 11, Problem 41P

Interpretation Introduction

Interpretation:

The product of a Diels-Alder reaction between 1,3-butadiene and diethyl acetylenedicarboxylate is to be determined.

Concept Introduction:
>
Diels-Alder reaction is a concerted cycloaddition of an alkene, called a dienophile, to a (conjugated) diene.
>
Acetylene reacts in the same way as an alkene in a Diels-Alder reaction. One of its pi-bond pairs forms a bond with the end carbon of a diene.
>
The reaction requires that the diene must adopt an s-cis conformation, i.e., the two double bonds must be on the same side of the single bond separating them.

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