Organic Chemistry - Standalone book
10th Edition
ISBN: 9780073511214
Author: Francis A Carey Dr., Robert M. Giuliano
Publisher: McGraw-Hill Education
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Question
Chapter 11, Problem 38P
Interpretation Introduction
Interpretation:
From the given dienes, the diene which undergo Diels-Alder reaction is to be determined.
Concept Introduction:
>Diels-Alder reaction is a concerted cycloaddition of an
The reaction requires that the diene must be able to adopt an s-cis conformation.
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1) Which diene can undergo Diels-Alder reaction?
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d)
Which diene could not participate in a Diels-Alder reaction?
Diels–Alder reaction of a monosubstituted diene (such as CH2=CH–CH=CHOCH3) with a monosubstituted dienophile (such as CH2=CHCHO)gives a mixture of products, but the 1,2-disubstituted product oftenpredominates. Draw the resonance hybrid for each reactant, and use thecharge distribution of the hybrids to explain why the 1,2-disubstitutedproduct is the major product.
Chapter 11 Solutions
Organic Chemistry - Standalone book
Ch. 11.1 - Prob. 1PCh. 11.1 - Prob. 2PCh. 11.2 - The two compounds shown differ by a factor of 60...Ch. 11.2 - Prob. 4PCh. 11.2 - Prob. 5PCh. 11.2 - Prob. 6PCh. 11.3 - Prob. 7PCh. 11.3 - Prob. 8PCh. 11.3 - Evaluate 2,3,3-trimethyl-1-butene as a candidate...Ch. 11.4 - After heating a solution of allyl tert-butyl...
Ch. 11.5 - Prob. 11PCh. 11.6 - Prob. 12PCh. 11.8 - Prob. 13PCh. 11.9 - What dienes containing isolated double bonds are...Ch. 11.10 - Prob. 15PCh. 11.10 - Prob. 16PCh. 11.11 - Prob. 17PCh. 11.12 - Dicarbonyl compounds such as quinones are reactive...Ch. 11.12 - 2,3-Di-tert-butyl-1,3-butadiene is extremely...Ch. 11.12 - Methyl acrylate (H2C=CHCO2CH3) reacts with...Ch. 11.13 - Prob. 21PCh. 11.14 - What diene and dienophile could you use to prepare...Ch. 11.14 - Write equations in the synthetic direction for the...Ch. 11.16 - Prob. 24PCh. 11.16 - Prob. 25PCh. 11 - Write structural formulas for each of the...Ch. 11 - Give an acceptable IUPAC name for each of the...Ch. 11 - A certain species of grasshopper secretes an...Ch. 11 - Which of the following are chiral?...Ch. 11 - Describe the molecular geometry expected for...Ch. 11 - Prob. 31PCh. 11 - What compound of molecular formula C6H10 gives...Ch. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - Prob. 36PCh. 11 - Identify the more reactive dienophile in each of...Ch. 11 - Prob. 38PCh. 11 - Prob. 39PCh. 11 - Prob. 40PCh. 11 - Prob. 41PCh. 11 - Prob. 42PCh. 11 - Prob. 43PCh. 11 - Prob. 44PCh. 11 - Prob. 45PCh. 11 - Prob. 46PCh. 11 - Show how to prepare each of the following...Ch. 11 - Prob. 48PCh. 11 - Prob. 49PCh. 11 - Prob. 50PCh. 11 - Compound A was converted to compound B by the...Ch. 11 - Suggest reasonable explanations for each of the...Ch. 11 - Prob. 53PCh. 11 - Prob. 54PCh. 11 - Prob. 55DSPCh. 11 - Prob. 56DSPCh. 11 - Prob. 57DSPCh. 11 - Prob. 58DSPCh. 11 - Prob. 59DSP
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- Consider the following dienes in a Diels–Alder reaction with ethene. Which will react the fastest? Which will react the slowest? Explainarrow_forwardFuran and maleimide undergo a Diels–Alder reaction at 25 °C to give the endo isomer of the product. When the reactiontakes place at 90 °C, however, the major product is the exo isomer. Further study shows that the endo isomer of theproduct isomerizes to the exo isomer at 90 °C.furan: O maleimide:OON H(a) Draw and label the endo and exo isomers of the Diels–Alder adduct of furan and maleimide.(b) Which isomer of the product would you usually expect from this reaction? Explain why this isomer is usually favored.(c) Examine your answer to (b) and determine whether this answer applies to a reaction that is kinetically controlled orone that is thermodynamically controlled, or both.(d) Explain why the endo isomer predominates when the reaction takes place at 25 °C and why the exo isomer predominates at 90 °Carrow_forwardWhich of the following will not act as diene reactant in a Diels Alder reaction? A) B) D) OCH3 H,CO Aarrow_forward
- Compounds P and Q can undergo a Diels-Alder reaction to form two regioisomeric products R and S as shown in Figure 5. OMe O C8H12O2 R C8H12O2 S Figure 5 Draw the chemical structures of regioisomeric compounds R and S. Using possible resonance contributors of P and Q predict which of the two regioisomers will be favoured in the reaction. Using curly arrows, draw the mechanism for the reaction of P and Q to form the dominant regioisomer you have predicted in your answer to part (ii) above.arrow_forwardChemistry Questionarrow_forwardTrue or False: Acetylene is a naturally occurring conjugated diene True or False: The Diels-Alder reaction has the stereochemistry of the dienophile is retained in the product. True or False: When looking at kinetic vs. thermodynamic products the kinetic product predominates at low temperature. True or False: the mechanism of the Diels-Alder reaction is three π bonds break; one σ bond and two π bonds form.arrow_forward
- Predict the product where cyclohexadiene does a Diels-Alder with itself.arrow_forwardWhat diene and dienophile are needed to prepare each compound by a Diels–Alder reaction?arrow_forwardWhich of the following dienes have an s-cis conformation, and which have an s-trans conformation? Of the s-trans dienes, which can readily rotate to s-cis?arrow_forward
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