PKG ORGANIC CHEMISTRY
5th Edition
ISBN: 9781259963667
Author: SMITH
Publisher: MCG
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Chapter 20, Problem 20.46P
Treatment of
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Compound A undergoes an acid-catalyzed hydrolysis. One of the products (B) that is isolated gives the following 1H NMR spectrum. Identify the compounds A and C
: Treatment of (CHa)CHCH(OH)CH,CH3 with TSOH affords two products (M and N) with molecular formula CgH12. The 'H NMR
spectra of M and N are given below. Propose structures for M and N and draw a mechanism to explain their formation.
1H NMR of M
3H
1H NMR of N
3H
3H
3 H
1H
3 H
2 H
2H
2H
8
7
6
4
1
0 9
8.
2
1
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Treatment of benzoic acid (C6H5CO2H) with NaOH followed by 1-iodo-3methylbutane forms H. H has a molecular ion at 192 and IR absorptions at 3064, 3035, 2960−2872, and 1721 cm−1. Propose a structure for H.
Chapter 20 Solutions
PKG ORGANIC CHEMISTRY
Ch. 20 - Prob. 20.1PCh. 20 - Which carbonyl groups in the anticancer drug taxol...Ch. 20 - Prob. 20.3PCh. 20 - Problem 20.4 What alcohol is formed when each...Ch. 20 - Problem 20.5 What aldehyde or ketone is needed to...Ch. 20 - Prob. 20.6PCh. 20 - Problem 20.7 Draw the products formed when is...Ch. 20 - Problem 20.8 Draw the products formed (including...Ch. 20 - Prob. 20.9PCh. 20 - Problem 20.10 Draw a stepwise mechanism for the...
Ch. 20 - Prob. 20.11PCh. 20 - Problem 20.12 Draw the products formed from ...Ch. 20 - Prob. 20.13PCh. 20 - Prob. 20.14PCh. 20 - Prob. 20.15PCh. 20 - Problem-20.16 Review the oxidation reactions using...Ch. 20 - Problem-20.17 Write the step(s) needed to convert ...Ch. 20 - Problem-20.18 Oct-1-yne reacts rapidly with ,...Ch. 20 - Prob. 20.19PCh. 20 - Prob. 20.20PCh. 20 - Problem 20.21 Draw the product of each reaction.
...Ch. 20 - Problem 20.22 Draw the products (including...Ch. 20 - Problem 20.23 What Grignard reagent and carbonyl...Ch. 20 - Problem 20.24 Linalool (the Chapter 9 opening...Ch. 20 - Problem 20.25 What Grignard reagent and carbonyl...Ch. 20 - Prob. 20.26PCh. 20 - Draw the products formed when each compound is...Ch. 20 - Problem 20.28 What ester and Grignard reagent are...Ch. 20 - Prob. 20.29PCh. 20 - Problem 20.30 What reagent is needed to convert ...Ch. 20 - Prob. 20.31PCh. 20 - What carboxylic acid formed from each alkyl halide...Ch. 20 - Prob. 20.33PCh. 20 - Problem 20.34 Draw the product when each compound...Ch. 20 - Problem 20.35 Synthesize each compound from...Ch. 20 - Prob. 20.36PCh. 20 - 20.37 Devise a synthesis of each alcohol from...Ch. 20 - 20.38 Draw the products formed when pentanal is...Ch. 20 - 20.39 Draw the product formed when is treated...Ch. 20 - The stereochemistry of the products of reduction...Ch. 20 - Prob. 20.41PCh. 20 - 20.42 Draw the products or each reduction...Ch. 20 - Prob. 20.43PCh. 20 - 20.44 Draw all stereoisomers formed in each...Ch. 20 - Prob. 20.45PCh. 20 - 20.46 Treatment of ketone A with ethynylithium...Ch. 20 - 20.47 Explain why metal hydride reduction gives an...Ch. 20 - Prob. 20.48PCh. 20 - 20.49 Identify the lettered compounds in the...Ch. 20 - Prob. 20.50PCh. 20 - 20.51 Draw a stepwise mechanism for the following...Ch. 20 - 20.52 Draw a stepwise mechanism for the following...Ch. 20 - Prob. 20.53PCh. 20 - 20.54 Draw a stepwise mechanism for the following...Ch. 20 - Prob. 20.55PCh. 20 - Prob. 20.56PCh. 20 - 20.57 What ester and Grignard reagent are needed...Ch. 20 - 20.58 What organolithium reagent and carbonyl...Ch. 20 - 20.59 What epoxide and organometallic reagent are...Ch. 20 - Prob. 20.60PCh. 20 - 20.61 Propose two different methods to synthesize...Ch. 20 - 20.62 Synthesize each compound from cyclohexanol...Ch. 20 - 20.63 Convert propan-2-ol into each compound....Ch. 20 - 20.64 Convert benzene into each compound. You may...Ch. 20 - 20.65 Design a synthesis of each compound from...Ch. 20 - 20.66 Synthesize each compound from the given...Ch. 20 - Prob. 20.67PCh. 20 - Prob. 20.68PCh. 20 - 20.69 An unknown compound A (molecular formula )...Ch. 20 - 20.70 Treatment of compound C (molecular formula )...Ch. 20 - 20.71 Treatment of compound E (molecular formula )...Ch. 20 - 20.72 Reaction of butanenitrile () with methyl...Ch. 20 - 20.73 Treatment of isobutene with forms a...Ch. 20 - 20.74 Draw a stepwise mechanism for the following...Ch. 20 - Prob. 20.75PCh. 20 - 20.76 Lithium tri-sec-butylborohydride, also known...Ch. 20 - Prob. 20.77PCh. 20 - Prob. 20.78PCh. 20 - Prob. 20.79PCh. 20 - 20.80 Draw a stepwise mechanism for the following...Ch. 20 - Prob. 20.81P
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- Compound H (C8H6O3) gives a precipitate when treated with hydroxylamine in aqueous ethanol and a silver mirror when treated with Tollens solution. Following is its 1H-NMR spectrum. Deduce the structure of compound H.arrow_forwardAn unknown compound D exhibits a strong absorption in its IR spectrum at 1692 cm−1. The mass spectrum of D shows a molecular ion at m/z = 150 and a base peak at 121. The 1H NMR spectrum of D is shown below. What is the structure of D?arrow_forwardAldehydes and ketones react with thiols to yield thioacetals just as they react with alcohols to yield acetals. Predict the product of the following reaction, and propose a mechanism:arrow_forward
- A step in a synthesis of PGE1 (prostaglandin E1, alprostadil) is the reaction of a trisubstituted cyclohexene with bromine to form a bromolactone. Propose a mechanism for formation of this bromolactone and account for the observed stereochemistry of each substituent on the cyclohexane ring. Alprostadil is used as a temporary therapy for infants born with congenital heart defects that restrict pulmonary blood flow. It brings about dilation of the ductus arteriosus, which in turn increases blood flow in the lungs and blood oxygenation.arrow_forwardNitriles, R–=C≡N, undergo a hydrolysis reaction when heated with aqueous acid. What is the structure of the compound produced by hydrolysis of propanenitrile, CH3CH2C≡N, if it has IR absorptions from 2500–3100 cm-1 and at 1710 cm-1, and has M+=74?arrow_forwardThe 1H and 13C NMR spectra below belong to a compound with formula C6H10O2. Propose a structure for this compound.arrow_forward
- Anethole, C10H12O, a major constituent of the oil of anise, has the 1H NMR spectrum shown. On oxidation with Na2Cr2O7, anethole yields p-methoxybenzoic acid. What is the structure of anethole? Assign all peaks in the NMR spectrum, and account for the observed splitting patterns.arrow_forwardTreatment of 1-aminoadamantane, C10H17N, with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and gives compound A. Propose a structural formula for compound A.arrow_forwardTreatment of (CH3)2CHCH(OH)CH2CH3 with TsOH affords two products (M and N) with molecular formula C6H12. The 1H NMR spectra of M and N are given below. Propose structures for M and N, and draw a mechanism to explain their formation.arrow_forward
- A solution of acetone [(CH3)2C=O] in ethanol (CH3CH2OH) in the presence of a trace of acid was allowed to stand for several days, and a new compound of molecular formula C7H16O2 was formed. The IR spectrum showed only one major peak in the functional group region around 3000 cm−1, and the 1H NMR spectrum is given here. What is the structure of the product?arrow_forwardPropose a structure of compound C (molecular formula C10H12O) consistent with the following data. C is partly responsible for the odor and flavor of raspberries. Compound C: IR absorption at 1717 cm–1arrow_forwardPropose a structure of compound C (molecular formula C10H12O) consistent with the following data. C is partly responsible for the odor and flavor of raspberries. Compound C: IR absorption at 1717 cm-1arrow_forward
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