Introduction to General, Organic and Biochemistry
12th Edition
ISBN: 9780357391594
Author: Frederick A. Bettelheim; William H. Brown; Mary K. Campbell
Publisher: Cengage Learning US
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Chapter 14, Problem 31P
15-35
Following are structural formulas for three of the drugs most widely prescribed to treat depression. Label all stereocenters in each and state the number of stereoisomers possible for each.
Fluoxetine
(Prozac!
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Consider the given structures. Which one of them has a stereocenter? Draw the structure and mark the stereocenter with an asterisk.
8. Two structures of Lipitor (a drug used to lower cholesterol) are shown below.
(a) Determine the absolute configuration of each indicated stereocenter. Fill in the correct circle.
(b) Determine if the two structures are the same compound or stereoisomers. Fill in the correct circle.
(a)
НО.
Carbon a
HO
O OH
Carbon a:
OR
OS
Carbon b
H
N
Carbon b:
R
OS
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H
Carbon c:
OR
OS
OH OH
Carbon c
F
Carbon d:
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Carbon d
(b) The two
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O the same
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O stereoisomers
Ethambutol is an anti-tuberculosis medicinal agent with two stereogenic centers, as shown in the given skeletal structure. It has 15, 2S configuration at its
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Redraw ethambutol, showing the correct configuration at each of the stereogenic centers.
OH
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C C
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Chapter 14 Solutions
Introduction to General, Organic and Biochemistry
Ch. 14.1 - Prob. 14.1QCCh. 14.2 - Problem 15-2 Assign priorities to the groups in...Ch. 14.2 - Problem 15-3 Assign an R or S configuration to the...Ch. 14.3 - Problem 15-4 3-Amino-2-butanol has two...Ch. 14.3 - Prob. 14.5QCCh. 14.3 - Prob. 14.6QCCh. 14 - 15-7 Answer true or false. The cis and trans...Ch. 14 - 15-8 What does the term “chiral” mean? Give an...Ch. 14 - 15-9 What does the term “achiral” mean? Give an...Ch. 14 - 15-10 Define the term “stereoisomer.” Name three...
Ch. 14 - 15-11 In what way are constitutional isomers...Ch. 14 - 15-12 Which of the following objects are chiral...Ch. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10PCh. 14 - 15-15 Explain why the carbon of a carbonyl group...Ch. 14 - 15-16 Which of the following compounds contain...Ch. 14 - 15-17 Which of the following compounds contain...Ch. 14 - Prob. 14PCh. 14 - 15-19 Draw the mirror image for each molecule: OH...Ch. 14 - Prob. 16PCh. 14 - 15-21 Answer true or false. For a molecule with...Ch. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - 15-26 For centuries, Chinese herbal medicine has...Ch. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 26PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - 15-35 Following are structural formulas for three...Ch. 14 - Prob. 32PCh. 14 - 15-37 Consider a cyclohexane ring substituted with...Ch. 14 - Prob. 34PCh. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - 15-41 Compound A(C5Hh, is not optically active and...Ch. 14 - Prob. 38PCh. 14 - 15-43 Triamcinolone acetonide, the active...Ch. 14 - 15-44 Consider the structure of the...Ch. 14 - Prob. 41PCh. 14 - 15-46 Consider Lunesta, a nonbenzodiazepine...Ch. 14 - Prob. 43PCh. 14 - Prob. 44P
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- 17-54 Following is the structure of immunosuppressant FK-506, a molecule shown to disrupt calcineurin-mediated signal transduction in T-lymphocytes. (a) There are three carbon—carbon double bonds present in this molecule. Which of the three has the potential for cis/trans isomerism? Assign a cis or trans con?guration to each carbon-carbon double bond that has this possibility. (b) How many stereocenters are present in this molecule? How many stereoisomers are possible for it? (c) Are there any aromatic components in this molecule? (d) Consider the two carbon atoms marked with asterisks. Assign an R or S con?guration of each stereocenter. (e) Because of the presence of a 21-member ring, this molecule is described as a macrocycle. This ring is fashioned by three types of bonds, several carbon-carbon bonds, one ester, one hemiacetal, and one amide. Locate the ester and the hemiacetal. (f) Draw the structural formula of the long chain compound that would result if the hemiacetal were to be cleaved to an alcohol and a carbonyl group.arrow_forward15-43 Triamcinolone acetonide, the active ingredient in Azmacort Inhalation Aerosol, is a steroid used to treat bronchial asthma. Triamcinolone acetonide Label the eight stereocenters in this molecule. How many stereoisomers are possible for it? (Of these, the stereoisomer with the configura tion shown here is the active ingredient in Azmacort.)arrow_forward15-10 Define the term “stereoisomer.” Name three types of stereoisomers.arrow_forward
- 15-17 Which of the following compounds contain stereocenters? Cyclopentanol l-Chloro-2-propanol 2-Methylcyclopentanol 1-Phenyl-l-propanolarrow_forward15-16 Which of the following compounds contain stereocenters? (a) 2-Chloropentane(b) 3-Chloropentane (c) 3-Chloro-l-butene(d) 1,2-Dichloropropanearrow_forward16-17 Propylamine (bp 48°C), ethylmethylamine (bp 37°C), and trimethylamine (bp 3°C) are constitutional isomers with the molecular formula C3HgN. Account for the fact that trimethylamine has the lowest boiling point of the three and propylamine has the highest.arrow_forward
- 17-74 Glucose, C6H12O6, contains an aldehyde group but exists predominantly in the form of the cyclic hemiacetal shown here. We will discuss this cyclic form of glucose in Chapter 20. A cyclic hemiacetal is formed when the —OH group of one carbon bonds to the carbonyl group of another carbon. (a) Which carbon in glucose provides the —OH group and which provides the —CHO group? (b) Draw the alternative chair confirmations of D-glucose and state which of the two is the more stable.arrow_forward16-54 Several poisonous plants, including Atropa belladonna, contain the alkaloid atropine. The name “belladonna” (which means “beautiful lady”) probably comes from the fact that Roman women used extracts from this plant to make themselves more attractive. Atropine is widely used by ophthal mologists and optometrists to dilate the pupils for eye examination. Classify the amino group in atropine as primary, secondary, or tertiary. Locate all stereocenters in atropine. Account for the fact that atropine is almost insoluble in water (1 g in 455 mL of cold water) but atropine hydrogen sulfate is very soluble (1 g in 5 mL of cold water). Account for the fact that a dilute aqueous solution of atropine is basic (pH approximately 10.0).arrow_forward16-18 Account for the fact that 1-butanamine (bp 78°C) has a lower boiling point than 1-butanol (bp 117°C)arrow_forward
- 16-58 Following is a structural formula of desosamine, a sugar component of several macrolide antibiotics, including the erythromycins. The configuration shown here is that of the natural product. Erythromycin is produced by a strain of Streptomyces erythreus originally found in a soil sample from the Philippine Archipelago. ch3 T Desosamine Name all the functional groups in desosamine. (Chapter 10) How many stereocenters are present in desosamine? How many stereoisomers are possible for it? How many pairs of enantiomers are possible for it? Draw the alternative chair conformations for desosamine and label which groups are equatorial and which are axial. (d > Which of the alternative chair conformations for desosamine is more stable?arrow_forward13-27 Define autoxidation.arrow_forward16-19 2-Me thy 1 propane (bp -12°C), 2-propanol (bp 82°C), and 2-propanamine (bp 32°C) all have approximately the same molecular weight, yet their boiling points are quite different. Explain the reason for these differences.arrow_forward
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