EBK GET READY FOR ORGANIC CHEMISTRY
EBK GET READY FOR ORGANIC CHEMISTRY
2nd Edition
ISBN: 9780100576377
Author: KARTY
Publisher: YUZU
Question
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Chapter 24, Problem 24.16P
Interpretation Introduction

(a)

Interpretation:

The mechanism and the major product of the given reaction is to be drawn, without considering the stereochemistry.

Concept introduction:

The two new sigma bonds fomraton take place by joining a conjugated diene and a dienophile is known as the Diels-Alder reaction (also known as [4+2] cycloaddition). The product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to attain the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitates the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

Interpretation Introduction

(b)

Interpretation:

The mechanism and the major product of the given reaction is to be drawn, without considering the stereochemistry.

Concept introduction:

The two new sigma bonds fomraton take place by joining a conjugated diene and a dienophile is known as the Diels-Alder reaction (also known as [4+2] cycloaddition). The product is a six-membered ring. The Diels-Alder reaction is concerted, that is, the process of bond breaking and bond formation occurs simultaneously. For a Diels-Alder reaction to take place, the diene must be able to attain the s-cis conformation. Diels-Alder reactions cannot take place with the diene in the s-trans conformation. Electron-donating groups attached to the diene and electron-withdrawing groups attached to the dienophile facilitates the reaction. These reactions are highly regioselective and stereospecific. Substituents that are cis to each other about the carbon-carbon double bond of the dienophile end up cis to each other in the new ring that is produced. Otherwise, the substituents end up trans to each other in the ring. Substituents attached to the terminal carbons of the diene end up cis to each other in the new ring that is produced if the double bonds of the diene are both cis or both trans. Otherwise, the substituents end up trans to each other in the ring. When the diene and dienophile are both unsymmetric, two isomeric products can be produced.

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Chapter 24 Solutions

EBK GET READY FOR ORGANIC CHEMISTRY

Ch. 24 - Prob. 24.11PCh. 24 - Prob. 24.12PCh. 24 - Prob. 24.13PCh. 24 - Prob. 24.14PCh. 24 - Prob. 24.15PCh. 24 - Prob. 24.16PCh. 24 - Prob. 24.17PCh. 24 - Prob. 24.18PCh. 24 - Prob. 24.19PCh. 24 - Prob. 24.20PCh. 24 - Prob. 24.21PCh. 24 - Prob. 24.22PCh. 24 - Prob. 24.23PCh. 24 - Prob. 24.24PCh. 24 - Prob. 24.25PCh. 24 - Prob. 24.26PCh. 24 - Prob. 24.27PCh. 24 - Prob. 24.28PCh. 24 - Prob. 24.29PCh. 24 - Prob. 24.30PCh. 24 - Prob. 24.31PCh. 24 - Prob. 24.32PCh. 24 - Prob. 24.33PCh. 24 - Prob. 24.34PCh. 24 - Prob. 24.35PCh. 24 - Prob. 24.36PCh. 24 - Prob. 24.37PCh. 24 - Prob. 24.38PCh. 24 - Prob. 24.39PCh. 24 - Prob. 24.40PCh. 24 - Prob. 24.41PCh. 24 - Prob. 24.42PCh. 24 - Prob. 24.43PCh. 24 - Prob. 24.44PCh. 24 - Prob. 24.45PCh. 24 - Prob. 24.46PCh. 24 - Prob. 24.47PCh. 24 - Prob. 24.48PCh. 24 - Prob. 24.49PCh. 24 - Prob. 24.50PCh. 24 - Prob. 24.51PCh. 24 - Prob. 24.52PCh. 24 - Prob. 24.53PCh. 24 - Prob. 24.54PCh. 24 - Prob. 24.55PCh. 24 - Prob. 24.56PCh. 24 - Prob. 24.57PCh. 24 - Prob. 24.58PCh. 24 - Prob. 24.59PCh. 24 - Prob. 24.60PCh. 24 - Prob. 24.61PCh. 24 - Prob. 24.62PCh. 24 - Prob. 24.63PCh. 24 - Prob. 24.64PCh. 24 - Prob. 24.65PCh. 24 - Prob. 24.66PCh. 24 - Prob. 24.67PCh. 24 - Prob. 24.68PCh. 24 - Prob. 24.69PCh. 24 - Prob. 24.70PCh. 24 - Prob. 24.71PCh. 24 - Prob. 24.72PCh. 24 - Prob. 24.73PCh. 24 - Prob. 24.74PCh. 24 - Prob. 24.75PCh. 24 - Prob. 24.76PCh. 24 - Prob. 24.77PCh. 24 - Prob. 24.78PCh. 24 - Prob. 24.79PCh. 24 - Prob. 24.80PCh. 24 - Prob. 24.81PCh. 24 - Prob. 24.82PCh. 24 - Prob. 24.83PCh. 24 - Prob. 24.84PCh. 24 - Prob. 24.1YTCh. 24 - Prob. 24.2YTCh. 24 - Prob. 24.3YTCh. 24 - Prob. 24.4YTCh. 24 - Prob. 24.5YTCh. 24 - Prob. 24.6YTCh. 24 - Prob. 24.7YTCh. 24 - Prob. 24.8YTCh. 24 - Prob. 24.9YTCh. 24 - Prob. 24.10YTCh. 24 - Prob. 24.11YTCh. 24 - Prob. 24.12YTCh. 24 - Prob. 24.13YTCh. 24 - Prob. 24.14YTCh. 24 - Prob. 24.15YTCh. 24 - Prob. 24.16YTCh. 24 - Prob. 24.17YT
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