ORGANIC CHEMISTRY
5th Edition
ISBN: 9781259977596
Author: SMITH
Publisher: MCG
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Chapter 23, Problem 23.67P
Interpretation Introduction
Interpretation: The product formed by the treatment of compound A with LDA followed by
Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical ketone, it abstracts hydrogen from least substituted carbon to form kinetic product.
Alkylation of
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On the synthesis of Product A, was there a notable difference when you used KOH versus LDA as base? Provide a brief explanation.
Aldehydes:Butyraldehyde
Bases: KOH, LDA
Solvents: Ethanol, Ether
Reactions:
Butyraldehyde + Ethanol + KOH or LDA
Butyraldehyde + Ether + KOH
The Stork reaction is a condensation reaction between an enamine donor and an a,ß-unsaturated carbonyl acceptor. The overall reaction consists of a
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3. hydrolysis of the enamine in dilute acid to regenerate the ketone.
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One step in the synthesis of the antihistamine fexofenadine (Section 23.5) involves acid-catalyzed hydration of the triple bond in A. Draw a stepwise mechanism for this reaction and explain why only ketone B is formed.
Chapter 23 Solutions
ORGANIC CHEMISTRY
Ch. 23 - Problem 23.1 Draw the enol or keto tautomer(s) of...Ch. 23 - Prob. 23.2PCh. 23 - Problem 23.3 When phenylacetaldehyde is dissolved...Ch. 23 - Prob. 23.4PCh. 23 - Problem 23.5 Which bonds in the following...Ch. 23 - Prob. 23.6PCh. 23 - Prob. 23.7PCh. 23 - Prob. 23.8PCh. 23 - Prob. 23.9PCh. 23 - Prob. 23.10P
Ch. 23 - Problem 23.11 Draw the products of each...Ch. 23 - Problem 23.12 Draw the products of each reaction....Ch. 23 - Prob. 23.13PCh. 23 - Prob. 23.14PCh. 23 - Prob. 23.15PCh. 23 - Prob. 23.16PCh. 23 - Prob. 23.17PCh. 23 - Problem 23.18 How can pentan-2-one be converted...Ch. 23 - Problem 23.19 Identify A, B, and C, intermediates...Ch. 23 - Problem 23.20 Which of the following compounds...Ch. 23 - Problem 23.21 Draw the products of each...Ch. 23 - Prob. 23.22PCh. 23 - Prob. 23.23PCh. 23 - Prob. 23.24PCh. 23 - Prob. 23.25PCh. 23 - Prob. 23.26PCh. 23 - Prob. 23.27PCh. 23 - Prob. 23.28PCh. 23 - 23.29 Draw enol tautomer(s) for each compound....Ch. 23 - 22.30 The cis ketone A is isomerized to a trans...Ch. 23 - 23.31 Draw enol tautomer(s) for each compound.
...Ch. 23 - Prob. 23.32PCh. 23 - Prob. 23.33PCh. 23 - Prob. 23.34PCh. 23 - 23.35 Rank the labeled protons in each compound in...Ch. 23 - Prob. 23.36PCh. 23 - Prob. 23.37PCh. 23 - 23.38 Acyclovir is an effective antiviral agent...Ch. 23 - 23.39 Explain why forms two different alkylation...Ch. 23 - Prob. 23.40PCh. 23 - 23.41 Acid-catalyzed bromination of pentanone ...Ch. 23 - 23.42 Draw a stepwise mechanism for the following...Ch. 23 - Prob. 23.43PCh. 23 - Prob. 23.44PCh. 23 - 23.45 Devise a synthesis of valproic acid , a...Ch. 23 - 23.46 Synthesize each compound from diethyl...Ch. 23 - Prob. 23.47PCh. 23 - Prob. 23.48PCh. 23 - Prob. 23.49PCh. 23 - 23.50 Draw the organic products formed in each...Ch. 23 - 23.51 Draw the products formed (including...Ch. 23 - Prob. 23.52PCh. 23 - Prob. 23.53PCh. 23 - 23.54 Clopidogrel is the generic name for Plavix,...Ch. 23 - 23.55 What reaction conditions—base, solvent, and...Ch. 23 - Prob. 23.56PCh. 23 - 23.57 Draw a stepwise mechanism showing how two...Ch. 23 - 23.58 Draw a stepwise mechanism for the following...Ch. 23 - Prob. 23.59PCh. 23 - 23.60 Draw stepwise mechanisms illustrating how...Ch. 23 - Prob. 23.61PCh. 23 - Prob. 23.62PCh. 23 - 23.63 Synthesize each compound from cyclohexanone...Ch. 23 - Prob. 23.64PCh. 23 - Prob. 23.65PCh. 23 - 23.66 Synthesize (Z)-hept-5-en-2-one from ethyl...Ch. 23 - Prob. 23.67PCh. 23 - 23.68 Capsaicin, the spicy component of hot...Ch. 23 - 23.69 Treatment of W with , followed by , affords...Ch. 23 - Prob. 23.70PCh. 23 - Prob. 23.71PCh. 23 - Prob. 23.72PCh. 23 - Prob. 23.73PCh. 23 - Prob. 23.74P
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