Organic Chemistry (Looseleaf) - With Access
4th Edition
ISBN: 9780077707316
Author: SMITH
Publisher: MCG
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Chapter 23, Problem 23.56P
What reaction conditions—base, solvent, and temperature—are needed to convert
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Answer Question a(i), a(ii), a(iii):
a(iii) What reagents would be needed to prepare compound B from compound A and to convert compound B into C.
The Stork reaction is a condensation reaction between an enamine donor and an α,β-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of
formation of an enamine from a ketone,
Michael addition to an α,β-unsaturated carbonyl compound, and
hydrolysis of the enamine in dilute acid to regenerate the ketone.
Consider the Stork reaction between cyclohexanone and propenal
Draw the structure of the product of the enamine formed between cyclohexanone and dimethylamine.
- Michael addition to an α,β-unsaturated carbonyl compound, and
- hydrolysis of the enamine in dilute acid to regenerate the ketone.
Identify A, B, and C, three intermediates in the synthesis of the pain reliever and anesthetic fentanyl.
Chapter 23 Solutions
Organic Chemistry (Looseleaf) - With Access
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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- The Stork reaction is a condensation reaction between an enamine donor and an α,β-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of formation of an enamine from a ketone, Michael addition to an α,β-unsaturated carbonyl compound, and hydrolysis of the enamine in dilute acid to regenerate the ketone. Consider the Stork reaction between acetophenone and 3-buten-2-one. Draw the structure of the product of the enamine formed between acetophenone and pyrrolidine. Draw the structure of the Michael addition product. Draw the structure of the final product.arrow_forwardThe compound eutypine is an antibacterial agent isolated from the fungus Eutypa lata. This fungus results in a disease common to vineyards called eutyposis. Give a sequence of reactions that will take the following reactant and give eutypine when the other reactants used in the sequence are acetylene and acetone.arrow_forwardIdentify the reagents represented by the letters a-e in the following scheme:arrow_forward
- The following molecule undergoes an intramolecular reaction in the presence of pyrrolidinium acetate, the protonated form of pyrrolidine. Draw the product of this reaction, assuming that a dehydration reaction takes place.arrow_forwardExplain Alkylation of a Diethyl Malonate Derivative ?arrow_forwardExplain the General Features of Reactions of Epoxides ?arrow_forward
- What is the major difference between the base-catalyzed and acid-catalyzed processes for nucleophilic addition of water to aldehydes and ketones? a. The base-catalyzed reaction takes place rapidly because hydroxide ion is a much better nucleophile than neutral water. b. The rate of reaction in base catalyzed process is slower than acid catalyzed process. c. The acid-catalyzed reaction takes place rapidly because the protonated carbonyl compound is a much better electrophile than the neutral compound. d. Only 1 and 3 are correct.arrow_forwardthe carbonyl donor or precursor in the following reaction is: a. A b. B c. C d. NaOHarrow_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_forward
- a. Rank the following esters from most reactive to least reactive in the first slow step of a nucleophilic acyl substitution reaction (formation of thetetrahedral intermediate): b. Rank the same esters from most reactive to least reactive in the second slow step of a nucleophilic acyl substitution reaction (collapse of thetetrahedralintermediate).arrow_forwardWhat product is formed when each compound undergoes an intramolecular reaction in the presence of acid?arrow_forwardWhat steps are needed to convert benzene into p-isobutylacetophenone, a synthetic intermediate used in the synthesis of the anti-inammatory agent ibuprofen.arrow_forward
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