Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 11, Problem 57P
When the 3-bromo-2-butanol with the stereochemical structure A is treated with concentrated HBr, it yields meso-2, 3-dibromobutane; a similar reaction of the 3-bromo-2-butanol B yields
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Match the reagent on the left in the list below with the product formed on the right when
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CH3CH2NH2
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CH3CH2-NH-CH2CH3
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HON
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1. How can we modify the reaction of phenol with Br2 and a Lewis acid catalyst to obtain only ortho-bromophenol
instead of a mixture of ortho-bromophenol and para-bromophenol?
Br2, H3O+
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H3C CH3
CH3
CH3
Aldehydes and ketones can be halogenated at their a-position by reaction with Cl₂, Br2, or 12, under acidic conditions. Using Br2 under acidic conditions, an intermediate enol is formed which adds
bromine at the a-position. The reaction stops after the addition of one bromine because the electron-withdrawing halogen decreases the basicity of the carbonyl oxygen, making the protonation less
favorable.
Draw curved arrows to show the movement of electrons in this step of the mechanism.
Arrow-pushing Instructions
:OH
:OH
Br-Br
H3C
H3C.
Br
Br
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2b
Chapter 11 Solutions
Organic Chemistry
Ch. 11 - Prob. 1PPCh. 11 - Practice Problem 11.2 Give bond-line formulas and...Ch. 11 - Prob. 3PPCh. 11 - Prob. 4PPCh. 11 - Prob. 5PPCh. 11 - Prob. 6PPCh. 11 - Prob. 7PPCh. 11 - Practice Problem 11.8 Show how you would prepare...Ch. 11 - Prob. 9PPCh. 11 - Prob. 10PP
Ch. 11 - Practice Problem 11.11
An exception to what is...Ch. 11 - Prob. 12PPCh. 11 - Prob. 13PPCh. 11 - Prob. 14PPCh. 11 - Prob. 15PPCh. 11 - Prob. 16PPCh. 11 - Prob. 17PPCh. 11 - Prob. 18PPCh. 11 - Practice Problem 11.19
Propose structures for each...Ch. 11 - Prob. 20PPCh. 11 - Prob. 21PPCh. 11 - Prob. 22PPCh. 11 - Prob. 23PPCh. 11 - Prob. 24PPCh. 11 - Give an IUPAC substitutive name for each of the...Ch. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - 11.30. Show how you might prepare 2-bromobutane...Ch. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Considering A-L to represent the major products...Ch. 11 - Write structures for the products that would be...Ch. 11 - Prob. 36PCh. 11 - Provide the reagents necessary for the following...Ch. 11 - 11.38. Predict the major product from each of the...Ch. 11 - Predict the products from each of the following...Ch. 11 - Provide the reagents necessary to accomplish the...Ch. 11 - 11.41. Provide reagents that would accomplish the...Ch. 11 - Prob. 42PCh. 11 - 11.43. A synthesis of the -receptor blocker called...Ch. 11 - Prob. 44PCh. 11 - Prob. 45PCh. 11 - 11.46. For each of the following, write a...Ch. 11 - 11.47. Vicinal halo alcohols (halohydrins) can be...Ch. 11 - Prob. 48PCh. 11 - Prob. 49PCh. 11 - Prob. 50PCh. 11 - Prob. 51PCh. 11 - Prob. 52PCh. 11 - Outlined below is a synthesis of the gypsy moth...Ch. 11 - Prob. 54PCh. 11 - Prob. 55PCh. 11 - Prob. 56PCh. 11 - 11.57. When the 3-bromo-2-butanol with the...Ch. 11 - 11.58. Reaction of an alcohol with thionyl...Ch. 11 - Prob. 59PCh. 11 - Prob. 60PCh. 11 - Prob. 1LGPCh. 11 - Prob. 2LGPCh. 11 - Synthesize the compound shown below from...
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