Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Chapter 17.12B, Problem 17.24P
Interpretation Introduction
Interpretation:
The product of the Diels-Alder reaction of benzyne with cyclopentadiene is to be predicted.
Concept introduction:
The Diels-Alder reaction is a cycloaddition reaction in which there is a
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Write a general rule that can be used to predict the major product of a Diels–Alder reaction between an alkene with an electron-withdrawing substituent and a diene with a substituent that can donate electrons by resonance depending on the location of the substituent on the diene.
Following is an example of a type of reaction known as a Diels-Alder reaction
1,3-Pentadiene
Ethylene
3-Methylcyclohexene
(a racemic mixture)
The Diels-Alder reaction between a diene and an alkene is quite remarkable in that it is
one of the few ways that chemists have to form two new carbon-carbon bonds in a single
reaction. Given what you know about the relative strengths of carbon-carbon sigma and
pi bonds, would you predict the Diels-Alder reaction to be exothermic or endothermic?
Explain your reasoning.
Draw structural formulas for the diene and dienophile that combine in a Diels-Alder reaction to form the product shown.
CN
Diene + Dienophile
CH₂O
• Consider E/Z stereochemistry of alkenes.
CN
Chapter 17 Solutions
Organic Chemistry (9th Edition)
Ch. 17.1 - Prob. 17.1PCh. 17.2 - Prob. 17.2PCh. 17.3 - Prob. 17.3PCh. 17.4 - Use resonance forms to show that the dipolar sigma...Ch. 17.6A - Prob. 17.5PCh. 17.6A - Prob. 17.6PCh. 17.6B - Propose a mechanism for the brommation of...Ch. 17.6B - Prob. 17.8PCh. 17.6B - Prob. 17.9PCh. 17.7 - Prob. 17.10P
Ch. 17.8 - Draw all the resonance forms of the sigma complex...Ch. 17.9 - Predict the mononitration products of the...Ch. 17.9 - Predict the mononitration products of the...Ch. 17.9 - Prob. 17.14PCh. 17.10 - Propose products (if any) and mechanisms for the...Ch. 17.10 - Predict the products (if any) of the following...Ch. 17.10 - Which reactions will produce the desired product...Ch. 17.10 - Prob. 17.19PCh. 17.11C - Prob. 17.20PCh. 17.12A - Prob. 17.21PCh. 17.12B - Propose a mechanism that shows why p-chlorotoluene...Ch. 17.12B - Propose mechanisms and show the expected products...Ch. 17.12B - Prob. 17.24PCh. 17.13A - What products would you expect from the following...Ch. 17.13A - What organocuprate reagent would you use for the...Ch. 17.13B - What products would you expect from the following...Ch. 17.13B - Prob. 17.28PCh. 17.13C - What products would you expect from the following...Ch. 17.13C - Prob. 17.30PCh. 17.14C - Prob. 17.31PCh. 17.14C - Predict the major products of the following...Ch. 17.15A - Predict the major products of treating the...Ch. 17.15B - Prob. 17.34PCh. 17.15B - Prob. 17.35PCh. 17.15B - Predict the major products when the following...Ch. 17.15C - Prob. 17.37PCh. 17.15C - a. Based on what you know about the relative...Ch. 17.15C - Show how you would synthesize the following...Ch. 17.16A - The bombardier beetle defends itself by spraying a...Ch. 17.16B - Predict the products formed when m-cresol...Ch. 17.16B - Prob. 17.42PCh. 17.16B - Prob. 17.43PCh. 17.16B - Predict the site(s) of electophilic attack on...Ch. 17.16B - Prob. 17.45PCh. 17.16B - Prob. 17.46PCh. 17.16B - Propose a synthetic sequence of this...Ch. 17.16B - Prob. 17.48PCh. 17.16B - Starting from toluene, propose a synthesis of this...Ch. 17 - Prob. 17.50SPCh. 17 - Prob. 17.51SPCh. 17 - Show how you would synthesize the following...Ch. 17 - Predict the major products of the following...Ch. 17 - Predict the major products of bromination of the...Ch. 17 - What products would you expect from the following...Ch. 17 - Prob. 17.56SPCh. 17 - Prob. 17.57SPCh. 17 - The following compound reacts with a hot,...Ch. 17 - Prob. 17.59SPCh. 17 - Electrophilic aromatic substitution usually occurs...Ch. 17 - Prob. 17.62SPCh. 17 - The most common selective herbicide for killing...Ch. 17 - Furan undergoes electrophilic aromatic...Ch. 17 - Prob. 17.65SPCh. 17 - Bisphenol A is an important component of many...Ch. 17 - Prob. 17.67SPCh. 17 - Prob. 17.68SPCh. 17 - Prob. 17.69SPCh. 17 - In Chapter14, we saw that Agent Orange contains...Ch. 17 - Phenol reacts with three equivalents of bromine in...Ch. 17 - Prob. 17.72SPCh. 17 - Prob. 17.73SPCh. 17 - A common illicit synthesis of methamphetamine...Ch. 17 - Prob. 17.75SPCh. 17 - Prob. 17.76SPCh. 17 - Prob. 17.77SPCh. 17 - Prob. 17.78SP
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- Step 6: Now that you have determined the substrates and mechanism of a Diels-Alder reaction, you will learn how to recognize when you should use the Diels-Alder reaction. In a synthesis reaction, if you are given a cyclohexene product with no other obvious functional group transformations and an electron-withdrawing group two carbons away from the alkene, it is likely made via the Diels-Alder reaction. Deduce the structures of the starting materials to form the Diels-Alder adduct shown. ..... CN CN Diene + Dienophilearrow_forwardDraw structural formulas for the diene and dienophile that combine in a Diels-Alder reaction to form the product shown. Diene + Dienophile OHarrow_forwardDraw the structures of the diene and dienophile that would be used in the diels alder reaction to synthesize the following compounds. Label each structure as diene or dienophile.arrow_forward
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