Organic Chemistry
7th Edition
ISBN: 9780321803221
Author: Paula Y. Bruice
Publisher: Prentice Hall
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Textbook Question
Chapter 22, Problem 70P
Show how valine can be prepared by
a. a Hell-Volhard-Zelinski reaction.
b. a Strecker synthesis.
c. a reductive animation.
d. a N-phthalimidomalonic ester synthesis.
e. an acetamidomalonic ester synthesis.
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b.
H3C
CH3
1.
2. H3O+
H3C
MgBr
H3C
Predict the major products of this reaction:
excess
H+
NaOH
?
A
Note that the first reactant is used in excess, that is, there is much more of the first reactant than the second.
If there won't be any products, just check the box under the drawing area instead.
Explanation
Check
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structure.
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1. For each of the reaction "railroads" below, you are either asked to give the structure(s) of the starting
material(s) or product(s), or provide reagents/conditions to accomplish the transformation, as
indicated by the boxes.
a.
NaOMe
H+
.CO,H
HO₂C
MeOH (excess)
MeOH
H3C
Br
يع
CH3
1. LiAlH4
2. H3O+
3. PBг3
H3C
1. Et-Li
2. H3O+
-CO₂Me
-CO₂Me
OH
CH3
CH3
ল
CH3
Chapter 22 Solutions
Organic Chemistry
Ch. 22.1 - a. Explain why, when the imidazole ring of...Ch. 22.2 - a. Which isomer(R)-alanine or (S)-alanineis...Ch. 22.2 - Prob. 4PCh. 22.3 - Prob. 5PCh. 22.3 - Prob. 6PCh. 22.3 - Draw the predominant form for glutamate in a...Ch. 22.3 - a. Why is the pKa of the glutamate side chain...Ch. 22.4 - Explain why the pI of lysine is the average of the...Ch. 22.4 - Calculate the pI of each of the following amino...Ch. 22.4 - a. Which amino acid has the lowest pI value? b....
Ch. 22.4 - Prob. 13PCh. 22.5 - What aldehyde is formed when valine is treated...Ch. 22.5 - Prob. 15PCh. 22.5 - Prob. 16PCh. 22.5 - Prob. 17PCh. 22.5 - Prob. 18PCh. 22.6 - Why is excess ammonia used in the preceding...Ch. 22.6 - Prob. 20PCh. 22.6 - What amino acid is formed using the...Ch. 22.6 - Prob. 22PCh. 22.6 - What amino acid is formed when the aldehyde used...Ch. 22.7 - Esterase is an enzyme that catalyzes the...Ch. 22.8 - Draw the tetrapeptide Ala-Thr-Asp-Asn and indicate...Ch. 22.8 - Prob. 26PCh. 22.8 - Prob. 27PCh. 22.8 - Which bonds in the backbone of a peptide can...Ch. 22.9 - What is the configuration about each of the...Ch. 22.9 - Glutathione is a tripeptide whose function is to...Ch. 22.10 - What dipeptides would be formed by heating a...Ch. 22.10 - Suppose you are trying to synthesize the dipeptide...Ch. 22.10 - Show the steps in the synthesis of the...Ch. 22.10 - a. Calculate the overall yield of bradykinin when...Ch. 22.11 - Show the steps in the synthesis of the...Ch. 22.13 - Prob. 36PCh. 22.13 - In determining the primary structure of insulin,...Ch. 22.13 - A decapeptide undergoes partial hydrolysis to give...Ch. 22.13 - Explain why cyanogen bromide does not cleave on...Ch. 22.13 - Indicate the peptides produced from cleavage by...Ch. 22.13 - Prob. 42PCh. 22.13 - Three peptides were obtained from a trypsin...Ch. 22.14 - Prob. 44PCh. 22.15 - How would a protein that resides in the nonpolar...Ch. 22.16 - a. Which would have the greatest percentage of...Ch. 22 - Prob. 47PCh. 22 - Glycine has pK2 values of 2.34 and 9.60. At what...Ch. 22 - Prob. 49PCh. 22 - Prob. 50PCh. 22 - Aspartame (its structure is on page 1007) has a pl...Ch. 22 - Draw the form of aspartate that predominates at...Ch. 22 - A professor was preparing a manuscript for...Ch. 22 - Prob. 54PCh. 22 - Determine the amino acid sequence of a polypeptide...Ch. 22 - Prob. 56PCh. 22 - Which is the more effective buffer at...Ch. 22 - Identify the location and type of charge on the...Ch. 22 - Draw the product obtained when a lysine side chain...Ch. 22 - After the polypeptide shown below was treated with...Ch. 22 - Treatment of a polypeptide with 2-mercaptoethanol...Ch. 22 - Show how aspartame can be synthesized using DCCD.Ch. 22 - -Amino acids can be prepared by treating an...Ch. 22 - Reaction of a polypeptide with carboxypeptidase A...Ch. 22 - a. How many different octapeptides can be made...Ch. 22 - Glycine has pKa values of 2.3 and 9.6. Do you...Ch. 22 - A mixture of 15 amino acids gave the fingerprint...Ch. 22 - Write the mechanism for the reaction of an amino...Ch. 22 - Prob. 69PCh. 22 - Show how valine can be prepared by a. a...Ch. 22 - A chemist wanted to test his hypothesis that the...Ch. 22 - Propose a mechanism for the rearrangement of the...Ch. 22 - A normal polypeptide and a mutant of the...Ch. 22 - Determine the amino acid sequence of a polypeptide...
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- Predict the intermediate 1 and final product 2 of this organic reaction: NaOMe ག1, ད།་, - + H You can draw 1 and 2 in any arrangement you like. 2 work up Note: if either 1 or 2 consists of a pair of enantiomers, just draw one structure using line bonds instead of 3D (dash and wedge) bonds at the chiral center. Explanation Check Click and drag to start drawing a structure. Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Parrow_forwardWhat is the total energy cost associated with the compound below adopting the shown conformation? CH3 HH DH CH3arrow_forwardΗΝ, Draw Final Product C cyclohexanone pH 4-5 Edit Enamine H3O+ CH3CH2Br THF, reflux H Edit Iminium Ionarrow_forward
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