Organic Chemistry
4th Edition
ISBN: 9780073402772
Author: Janice G. Smith
Publisher: MCG
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Chapter 29, Problem 29.9P
Interpretation Introduction
Interpretation: Among the given
Concept Introduction: Racemic mixture is a mixture of enantiomers in equal amounts. It is optically inactive. Racemic mixture can be resolved by the treatment of enantiomers with chiral reagent. Enantiomers have different chemical properties in chiral environment.
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Which of the following amines can be used to resolve a racemic mixture of amino acids?
Lysine and tryptophan are two amino acids that contain an additional N atom in the R group bonded to the α carbon. While lysine is classied as a basic amino acid because it contains an additional basic N atom, tryptophan is classied as a neutral amino acid. Explain why this difference in classication occurs.
Which of the attached amines can be used to resolve a racemic mixture of amino acids?
Chapter 29 Solutions
Organic Chemistry
Ch. 29 - Prob. 29.1PCh. 29 - Problem 29.2
What form exists at the isoelectric...Ch. 29 - Problem 29.3
Explain why the of the group of an...Ch. 29 - Problem 29.5
What -halo carbonyl compound is...Ch. 29 - Problem 29.6
The enolate derived from diethyl...Ch. 29 - Problem 29.7
What amino acid is formed when is...Ch. 29 - Problem 29.8
What aldehyde is needed to synthesize...Ch. 29 - Prob. 29.8PCh. 29 - Prob. 29.9PCh. 29 - Prob. 29.10P
Ch. 29 - Prob. 29.11PCh. 29 - Problem 29.13
What alkene is needed to synthesize...Ch. 29 - Problem 29.14
Draw the structure of each peptide....Ch. 29 - Name each peptide using both the one-letter and...Ch. 29 - Prob. 29.15PCh. 29 - Prob. 29.16PCh. 29 - Problem 29.18
Glutathione, a powerful antioxidant...Ch. 29 - Problem 29.19
Draw the structure of the...Ch. 29 - Problem 29.20
Give the amino acid sequence of an...Ch. 29 - a What products are formed when each peptide is...Ch. 29 - Prob. 29.21PCh. 29 - Devise a synthesis of each peptide from amino acid...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.24PCh. 29 - Consider two molecules of a tetrapeptide composed...Ch. 29 - What types of stabilizing interactions exist...Ch. 29 - Prob. 29.27PCh. 29 - Draw the product formed when the following amino...Ch. 29 - With reference to the following peptide: a...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.31PCh. 29 - Prob. 29.32PCh. 29 - Histidine is classified as a basic amino acid...Ch. 29 - Tryptophan is not classified as a basic amino acid...Ch. 29 - What is the structure of each amino acid at its...Ch. 29 - To calculate the isoelectric point of amino acids...Ch. 29 - What is the predominant form of each of the...Ch. 29 - 29.37 What is the predominant form of each of the...Ch. 29 - a. Draw the structure of the tripeptide A–A–A, and...Ch. 29 - Draw the organic product formed when the amino...Ch. 29 - 29.39 Draw the organic products formed in each...Ch. 29 - 29.40 What alkyl halide is needed to synthesize...Ch. 29 - 29.41 Devise a synthesis of threonine from diethyl...Ch. 29 - 29.42 Devise a synthesis of each amino acid from...Ch. 29 - Prob. 29.45PCh. 29 - Prob. 29.46PCh. 29 - Prob. 29.47PCh. 29 - Prob. 29.48PCh. 29 - Prob. 29.49PCh. 29 - 29.48 Brucine is a poisonous alkaloid obtained...Ch. 29 - Prob. 29.51PCh. 29 - Prob. 29.52PCh. 29 - Draw the structure for each peptide: (a) Phe–Ala;...Ch. 29 - 29.52 For the tetrapeptide Asp–Arg–Val–Tyr:
a....Ch. 29 - Prob. 29.55PCh. 29 - Explain why a peptide CN bond is stronger than an...Ch. 29 - Prob. 29.57PCh. 29 - 29.55 Draw the amino acids and peptide fragments...Ch. 29 - Prob. 29.59PCh. 29 - Prob. 29.60PCh. 29 - Prob. 29.61PCh. 29 - 29.59 An octapeptide contains the following amino...Ch. 29 - Prob. 29.63PCh. 29 - Prob. 29.64PCh. 29 - Draw all the steps in the synthesis of each...Ch. 29 - 29.62 Write out the steps for the synthesis of...Ch. 29 - 29.64 Another method to form a peptide bond...Ch. 29 - Prob. 29.68PCh. 29 - Prob. 29.69PCh. 29 - Which of the following amino acids are typically...Ch. 29 - After the peptide chain of collagen has been...Ch. 29 - Prob. 29.72PCh. 29 - Prob. 29.73PCh. 29 - 29.70 The anti-obesity drug orlistat works by...Ch. 29 - Prob. 29.75P
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- What special role does the amino acid cysteine have in the peptides vasopressin and oxytocin?arrow_forwardLysine and tryptophan are two amino acids that contain an additional N atom in the R group bonded to the α carbon. While lysine is classified as a basic amino acid because it contains an additional basic N atom, tryptophan is classified as a neutral amino acid. Explain why this difference in classification occurs.arrow_forwardLysine and tryptophan are two amino acids that contain an additional N atom in the R group bonded to the a carbon. While lysine is classified as a basic amino acid because it contains an additional basic N atom, tryptophan is classified as a neutral amino acid. Explain why this difference in classification occurs.arrow_forward
- a. which amino acid can form an N-linked bond with any carbohydrate b. which amino acid would most likely be found at a rigid turn in a protein structure?arrow_forwardPhenylalanine as N-termminus is incorrect. Please provide the correct solution.arrow_forwardGramicidin S, a topical antibiotic produced by the bacterium Bacillus brevis, is a cyclic decapeptide formed from five amino acids. Draw the structures of the amino acids that form gramicidin S, and explain why this compound possesses two unusual structural features.arrow_forward
- General reactions for drugs belonging to the group of aliphatic amino acids: A) with iodine solution B) With ninhydrin C) With copper sulfate in an alkaline environment D) With resorcinolarrow_forwardLysine and tryptophan are two amino acids that contain an additional Natom in the R group bonded to the a carbon. While lysine is classified asa basic amino acid because it contains an additional basic N atom,tryptophan is classified as a neutral amino acid. Explain why thisdifference in classification occurs.arrow_forwardDraw the tetrapeptide below out in full chemical structure by attaching the four amino acidsin order (this is an application of the characteristicorganic reaction Formation of an Amide. You can use any chemical notation orcombination of notations to draw your structure, but all bonds and atoms must be shown. Tyr-Cys-Met-Hisarrow_forward
- Draw the structure of leu-enkephalin, a pentapeptide that acts as an analgesic and opiate, and has the following sequence: Tyr–Gly–Gly–Phe–Leu. (The structure of a related peptide, met-enkephalin, appeared in Section 22.6B.)arrow_forwardIdentify the classification of amine in arginine.arrow_forwardThe shown image is a reaction diagram for the hydrolysis of peptide bonds. Appropriately substituted phosphonates (structure shown above) were successfully designed as strong inhibitors for proteolytic enzymes. Explain why this strategy was successful. Note that the lengths of P–O bonds in phosphonates are significantly longer than the corresponding C–O bonds.arrow_forward
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