Organic Chemistry
4th Edition
ISBN: 9780073402772
Author: Janice G. Smith
Publisher: MCG
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Chapter 23, Problem 23.63P
Interpretation Introduction
Interpretation: The stepwise mechanism for the given reaction is to be drawn.
Concept introduction: Lithium diisopropylamide (LDA) is a sterically hindered strong base. In an unsymmetrical
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A key step in the synthesis of β-vetivone, a major constituent of vetiver, a perennial grass found in tropical and subtropical regions of the world, involved the reaction of compound A and dihalide B with two equivalents of LDA to form C. Draw a stepwise mechanism for this reaction. β-Vetivone contains a spiro ring system—that is, two rings that share a single carbon atom.
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Chapter 23 Solutions
Organic Chemistry
Ch. 23 - Problem 23.1 Draw the enol or keto tautomer(s) of...Ch. 23 - Draw a stepwise mechanism for the following...Ch. 23 - Prob. 23.3PCh. 23 - Prob. 23.4PCh. 23 - Which CH bonds in the following molecules are...Ch. 23 - Prob. 23.6PCh. 23 - Prob. 23.7PCh. 23 - When ethyl acetoacetate (CH3COCH2CO2CH2CH3) is...Ch. 23 - Prob. 23.9PCh. 23 - Prob. 23.10P
Ch. 23 - Prob. 23.11PCh. 23 - Problem 23.11 Draw the products of each...Ch. 23 - Problem 23.12 Draw the products of each reaction....Ch. 23 - Prob. 23.14PCh. 23 - Prob. 23.15PCh. 23 - Prob. 23.16PCh. 23 - Prob. 23.17PCh. 23 - Prob. 23.18PCh. 23 - Problem 23.18 How can pentan-2-one be converted...Ch. 23 - Problem 23.19 Identify A, B, and C, intermediates...Ch. 23 - Prob. 23.21PCh. 23 - Problem 23.21 Draw the products of each...Ch. 23 - Prob. 23.23PCh. 23 - What alkyl halides are needed to prepare each...Ch. 23 - Prob. 23.25PCh. 23 - Prob. 23.26PCh. 23 - Prob. 23.27PCh. 23 - Prob. 23.28PCh. 23 - Prob. 23.29PCh. 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 - Draw enol tautomers for each compound. a. b. c.Ch. 23 - Prob. 23.33PCh. 23 - What hydrogen atoms in each compound have a pKa25?...Ch. 23 - Rank the labeled protons in each compound in order...Ch. 23 - Prob. 23.36PCh. 23 - Prob. 23.37PCh. 23 - Prob. 23.38PCh. 23 - Prob. 23.39PCh. 23 - 23.38 Acyclovir is an effective antiviral agent...Ch. 23 - Prob. 23.41PCh. 23 - 23.39 Explain why forms two different alkylation...Ch. 23 - 23.41 Acid-catalyzed bromination of pentanone ...Ch. 23 - Draw a stepwise mechanism for each reaction. a. b.Ch. 23 - What alkyl halides are needed to prepare each...Ch. 23 - Use the malonic ester synthesis to prepare each...Ch. 23 - 23.45 Devise a synthesis of valproic acid , a...Ch. 23 - Synthesize each compound from diethyl malonate....Ch. 23 - Prob. 23.49PCh. 23 - What alkyl halides are needed to prepare each...Ch. 23 - Synthesize each compound from ethyl acetoacetate....Ch. 23 - Draw the organic products formed in each reaction....Ch. 23 - 23.51 Draw the products formed (including...Ch. 23 - Prob. 23.54PCh. 23 - 23.54 Clopidogrel is the generic name for Plavix,...Ch. 23 - 23.55 What reaction conditions—base, solvent, and...Ch. 23 - Explain why each of the following reactions will...Ch. 23 - Prob. 23.58PCh. 23 - 23.57 Draw a stepwise mechanism showing how two...Ch. 23 - 23.58 Draw a stepwise mechanism for the following...Ch. 23 - Prob. 23.61PCh. 23 - 23.60 Draw stepwise mechanisms illustrating how...Ch. 23 - Prob. 23.63PCh. 23 - Prob. 23.64PCh. 23 - Convert acetophenone (C6H5COCH3) into each of the...Ch. 23 - Prob. 23.66PCh. 23 - Prob. 23.67PCh. 23 - Prob. 23.68PCh. 23 - Synthesize each product from ethyl acetoacetate...Ch. 23 - Prob. 23.70PCh. 23 - Prob. 23.71PCh. 23 - 23.68 Capsaicin, the spicy component of hot...Ch. 23 - 23.69 Treatment of W with , followed by , affords...Ch. 23 - Prob. 23.74PCh. 23 - Prob. 23.75PCh. 23 - Prob. 23.76PCh. 23 - Prob. 23.77PCh. 23 - Prob. 23.78P
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- A key step in a synthesis of the antimalarial drug quinine involves an intramolecular nucleophilic substitution that converts A to B. Draw the structure of B and give the reagents needed to convert B to quinine.arrow_forwardOne 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.arrow_forwardChoose among the synthetic steps provided in order to propose a reasonable stepwise preparation of the following compound C starting from benzene. Draw the stepwise synthetic schemes (with reagents and product(s) of each step).arrow_forward
- Slow addition of organolithium reagent A to B afforded C, anintermediate in the synthesis of the chapter-opening molecule,resiniferatoxin. Draw a stepwise mechanism for this process.arrow_forwardConsider carbonyl compounds A–E drawn below. (a) Rank A–E in order of increasing stability. (b) Rank A–E in order of increasing amount of hydrate formed when treated with aqueous acid. (c) Which compound is most reactive in nucleophilic addition?arrow_forwardDraw a stepwise mechanism for the conversion of lactone A to ester Busing HCl in ethanol. B is converted in one step to ethyl chrysanthemate,a useful intermediate in the synthesis of a variety of pyrethrins, naturally occurring insecticides with three-membered rings that are isolated fromchrysanthemumsarrow_forward
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