The diene and dienophile for the given products are to be determined. Concept introduction: Diels–Alder is a type of organic reaction in which substituted alkene and conjugated diene react to form substituted cyclohexene derivative. It is a single step reaction. The general reaction of Diels–Alder is as follows: Diels–Alder reaction is between a conjugate diene and a reactant containing double bond (dienophile) to form the product and the product is called adduct. Diels–Alder reactions are highly stereospecific. The configuration, if dienophile is retained in the product and the reaction, is syn addition. The dienes react with dienophiles in cis forms rather than trans forms. Endo and exo refers to the orientation of dienophile and its electron withdrawing group, when it reacts with a diene in Diels–Alder reaction. The reaction with orientation of electron withdrawing group of dienophiles under the π orbitals of the diene is endo. The reaction with orientation of electron withdrawing group of dienophiles away from the π orbitals of the diene is exo Endo is favored in the transition state of Diels–Alder reaction because of its lower energy. If a compound is stable, it has lower energy and if a compound is unstable, it has higher energy.

Question

> Can the molecule on the right-hand side of this organic reaction be made in good yield from no more than two reactants, in one step, by moderately heating the reactants? ? Δ • If your answer is yes, then draw the reactant or reactants in the drawing area below. You can draw the reactants in any arrangement you like. If your answer is no, check the box under the drawing area instead. Explanation Check Click and drag to start drawing a structure. Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Acces

Answer 1

Question

Chapter 13, Problem 43P

Interpretation Introduction

Interpretation:

The diene and dienophile for the given products are to be determined.

Concept introduction:

Diels–Alder is a type of organic reaction in which substituted alkene and conjugated diene react to form substituted cyclohexene derivative. It is a single step reaction.

The general reaction of Diels–Alder is as follows:

Diels–Alder reaction is between a conjugate diene and a reactant containing double bond (dienophile) to form the product and the product is called adduct.

Diels–Alder reactions are highly stereospecific. The configuration, if dienophile is retained in the product and the reaction, is syn addition.

The dienes react with dienophiles in cis forms rather than trans forms.

Endo and exo refers to the orientation of dienophile and its electron withdrawing group, when it reacts with a diene in Diels–Alder reaction.

The reaction with orientation of electron withdrawing group of dienophiles under the π orbitals of the diene is endo.

The reaction with orientation of electron withdrawing group of dienophiles away from the π orbitals of the diene is exo

Endo is favored in the transition state of Diels–Alder reaction because of its lower energy.

If a compound is stable, it has lower energy and if a compound is unstable, it has higher energy.

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