Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 20, Problem 6PP
Interpretation Introduction
Interpretation:
The preparation of each amine through reductive amination is to be shown.
Concept Introduction:
The conversion of
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Show how to synthesize the following amines from the indicated starting materials byreductive amination.(a) benzylmethylamine from benzaldehyde
The two most general amine syntheses are the reductive amination of carbonyl compounds and the reduction of amides.Show how these techniques can be used to accomplish the following syntheses.(a) benzoic acid S benzylamine (b) benzaldehyde S benzylamine(c) pyrrolidine S N@ethylpyrrolidine (d) cyclohexanone S N@cyclohexylpyrrolidine(e) HOOC¬(CH2)3 ¬COOH S pentane@1,5@diamine (cadaverine)
Arrange the members of each group in order of decreasing basicity: (a) Ammonia, aniline, methylamine (b) Acetanilide, aniline, N-methylaniline (c) 2,4-Dichloroaniline, 2,4-dimethylaniline, 2,4-dinitroaniline (d) 3,4-Dichloroaniline, 4-chloro-2-nitroaniline, 4-chloro-3-nitroaniline (e) Dimethylamine, diphenylamine, N-methylaniline
Chapter 20 Solutions
Organic Chemistry
Ch. 20 - Prob. 1PPCh. 20 - Prob. 2PPCh. 20 - Practice Problem 20.3
Write a mechanism that...Ch. 20 - Prob. 4PPCh. 20 - PRACTICE PROBLEM 20.5 Outline a preparation of...Ch. 20 - Prob. 6PPCh. 20 - Prob. 7PPCh. 20 - Prob. 8PPCh. 20 - Prob. 9PPCh. 20 - Prob. 10PP
Ch. 20 - Practice Problem 20.11 In the preceding examples...Ch. 20 - Prob. 12PPCh. 20 - Prob. 13PPCh. 20 - Practice Problem 20.14
Outline a synthesis of...Ch. 20 - Prob. 15PPCh. 20 - Prob. 16PPCh. 20 - Prob. 17PPCh. 20 - Prob. 18PPCh. 20 - Prob. 19PCh. 20 - 20.20 Give common or systematic names for each of...Ch. 20 - Which is the most basic nitrogen in each compound?...Ch. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Show how you might synthesize each of the...Ch. 20 - Prob. 25PCh. 20 - 20.26 Provide the major organic product from each...Ch. 20 - Prob. 27PCh. 20 - 20.28 What products would you expect to be formed...Ch. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Write equations for simple chemical rests or state...Ch. 20 - Prob. 33PCh. 20 - Explain the following, including mention of key...Ch. 20 - 20.35 Provide a detailed mechanism for each of the...Ch. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - 20.40 Give structures for compounds R-W:
Ch. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Diethylpropion (shown here) is a compound used in...Ch. 20 - Prob. 44PCh. 20 - 20.45 Compound W is soluble in dilute aqueous HCI...Ch. 20 - 20.46 Propose structures for compounds X, Y, and...Ch. 20 - Compound A(C10H15N) is soluble in dilute HCI. The...Ch. 20 - Prob. 48PCh. 20 - Prob. 49PCh. 20 - For each of the following, identify the product...Ch. 20 - 20.51 Develop a synthesis for the following...Ch. 20 - 20.52 When phenyl isochiocyanatc, , is reduced...Ch. 20 - Prob. 53PCh. 20 - 20.54 Propose a mechanism that can explain the...Ch. 20 - When acetone is treated with anhydrous ammonia in...Ch. 20 - Prob. 56P
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- Predict the products from the reactions of the following amines with sodium nitrite indilute HCl.(a) cyclohexanaminearrow_forwardGive the products expected when the following tertiary amines are treated with a peroxyacid and heated.(a) N,N-dimethylhexan-2-aminearrow_forwardDraw a structural formula for each amine and amine derivative. (a) N,N-Dimethylaniline (b) Triethylamine (c) tert-Butylamine (d) 1,4-Benzenediamine (e) 4-Aminobutanoic acid (f) (R)-2-Butanamine (g) Benzylamine (h) trans-2-Aminocyclohexanol (i) 1-Phenyl-2-propanamine (amphetamine) (j) Lithium diisopropylamide (LDA) (k) Benzyltrimethylammonium hydroxide (Triton B)arrow_forward
- Show how Gabriel syntheses are used to prepare the following amines.(a) benzylaminearrow_forwardMaraviroc, a drug used to treat HIV, is prepared by reductive amination of aldehyde A with amine B. What is the structure of maraviroc, if the most basic N atom of amine B is used in reductive amination?arrow_forward3 Compare the basicity of amines with other common bases, and explain how theirbasicity varies with hybridization and aromaticity.arrow_forward
- How could you prepare the following amides using an acid chloride and an amine or ammonia? (a) CH,CH₂CONHCH3 (b) N,N-Diethylbenzamide (c) Propanamidearrow_forward19-33 Rank the amines in each set in order of increasing basicity. (b) sbims ne (a) NH2 NH2 N. H (c) H (d) NH2 NH2 NH2 H3C H2 (е) NH2 CH,NH, CONH,arrow_forwardThe following three derivatives of succinimide are anticonvulsants that have found use in the treatment of epilepsy, particularly petit mal seizures. Q. Describe the chemistry involved in the conversion of (B) to (C). You need not present detailed mechanisms. Rather, state what is accomplished by treating (B) with NaOH and then with HCl followed by heating.arrow_forward
- In the mid-1930s a substance was isolated from a fungus that is a parasite of ryes and other grasses. This alkaloid, lysergic acid, has been of great interest to chemists because of its strange, dramatic action on the human mind. Many derivatives of lysergic acid are known, some with medicinal applications. Perhaps the best known derivative of lysergic acid is the potent hallucinogen lysergic acid diethylamide (LSD): మగవా జి N-H LSD (CH25N;O) Like other alkaloids, LSD is a weak base, with Kp = 7.6 × 107. What is the pH of a 0.94 M solution of LSD? pH =arrow_forward22.47 Tertiary amines with three different alkyl groups are chiral but cannot be resolved because pyramidal inversion causes racemization at room temperature. Nevertheless, chiral aziridines can be resolved and stored at room temperature. Aziridine is a three-membered heterocycle containing a nitrogen atom. The following is an example of a chiral aziridine. In this compound, the nitrogen atom is a chiral center. Suggest a reason why chiral aziridines do not undergo racemization at room temperature.arrow_forward19.48 Phthalic acid and isophthalic acid have protons on two carboxy groups that can be removed with base. (a) Explain why the pKa for loss of the first proton (pKa1) is lower for phthalic acid than isophthalic acid. (b) Explain why the pKa for loss of the second proton (pKa2) is higher for phthalic acid than isophthalic acid. OH OH phthalic acid pKa1 = 2.9 pKa2 = 5.4 HO isophthalic acid pkat = 3.7 PK a2 = 4.6 pKa2 Draw out the single anions (one deprotonation) and bear in mind that there is free rotation about C-C single bonds. OH Look for stabilization based on the conformations possible from Such rotation.arrow_forward
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