ORGANIC CHEMISTRY (LL) W/WILEYPLUS NEXT
12th Edition
ISBN: 9781119664635
Author: Solomons
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 38P
Interpretation Introduction
Interpretation:
In the given conditions, the mechanism of formation of the aldol product by the rearrangement of epoxy alcohol is to be proposed.
Concept Introduction:
▸ TBSOTf stands for tert-butyldimethylsilyltriflate. It is the silylating reagent.
▸ TBSOTf is used for the protection of
Expert Solution & Answer
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Students have asked these similar questions
(19, 8, 3) Specify a synthetic scheme that would produce the compound shown above in the fewest steps possible. Use one of the starting materials shown together with any of the available reagents. Give the number of the starting material followed by the letters of the reagents in the order of their use, for example: 3be.
11. Compound A, C9H17N, is an optically inactive alkaloid, containing a tertiary amine that is
not located at the bridgehead of the structures fused bicyclic ring system. Exhaustive alkylation
of A with methyl iodide, followed by a Hofmann elimination reaction resulted in a racemic
mixture of chiral tertiary amine products B, C10H19N. Provide a structure for A and one of the
enantiomeric products B.
b) Optical isomers can often be formed during these reactions. For products A-H
indicate how many different optical isomers you expect to form for each
from these reactions (you do not have to indicate whether they are diastereomers/enantiomers).
c) In the preparation of substance D by ozonolysis, the second step is necessary treatment of the reaction
mixture with zinc in acetic acid. If we forgot this step, we would get substance V instead of substance D, which
would probably explode when isolated. What is the structure of substance V?
*24
X
1: ozone
V
e) What products do you expect to form if they react with alkene X: I - HBr in diethyl ether; II - Brl in methanol; III -
PhSCI in diethyl ether; IV - Selectfluor in methanol.
P
M
EtOH
NA
EtONa
PhSNa
EtOH E
H+
O
TsCl
Pyridín
F-
T2, Pd/C
G4
mCPBA
H₂SO4
10 %, H₂O
1: BH3
H◄
2: H₂O₂
ill
X
Br₂
cyclohexane
HCI
A
> В
B
HBr
warmth,
benzoylperoxid
1: ozone
2: Zn, ACOH
Mg
THF
с
D
D₂O
K
I + J
NaOH
Chapter 18 Solutions
ORGANIC CHEMISTRY (LL) W/WILEYPLUS NEXT
Ch. 18 - Prob. 1PPCh. 18 - Practice Problem 18.2 Would optically active...Ch. 18 - Prob. 3PPCh. 18 - Practice Problem 18.4 Why do we say that the...Ch. 18 - Prob. 5PPCh. 18 - Practice Problem 18.6 (a) Write a reaction...Ch. 18 - PRACTICE PROBLEM 18.7
Show how you would use the...Ch. 18 - Practice Problem 18.8 The acetoacetic ester...Ch. 18 - Practice Problem 18.9
In the synthesis of the keto...Ch. 18 - PRACTICE PROBLEM 18.10 How would you use the...
Ch. 18 - PRACTICE PROBLEM 18.11
How would you use the...Ch. 18 - PRACTICE PROBLEM 18.12 Outline all steps in a...Ch. 18 - PRACTICE PROBLEM 18.13
The antiepileptic drug...Ch. 18 - PRACTICE PROBLEM 18.14 Show how you could employ...Ch. 18 - Prob. 15PCh. 18 - Treating a solution of cis-1-decalone with base...Ch. 18 - Prob. 17PCh. 18 - Prob. 18PCh. 18 - Prob. 19PCh. 18 - Prob. 20PCh. 18 - Prob. 21PCh. 18 - Prob. 22PCh. 18 - Prob. 23PCh. 18 - The synthesis of cyclobutanecarboxylic acid given...Ch. 18 - Prob. 25PCh. 18 - Prob. 26PCh. 18 - Prob. 27PCh. 18 - Prob. 28PCh. 18 - Compound J, a compound with two four-membered...Ch. 18 - Prob. 30PCh. 18 - Prob. 31PCh. 18 - 18.32 Shown below is a synthesis of the elm bark...Ch. 18 - 18.33 (a) A compound U gives a negative iodoform...Ch. 18 - 18.34 Compound A has the molecular formula and...Ch. 18 - Prob. 35PCh. 18 - Prob. 36PCh. 18 - Prob. 37PCh. 18 - Prob. 38PCh. 18 - 1. -Carotene is a highly conjugated hydrocarbon...Ch. 18 - Dehydroabietic acid is a natural product isolated...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- (R)-Pulegone is converted to (R)-citronellic acid by addition of HCI followed by treatment with NaOH. CI 1. NAOH 2. HCI HCI HO (R)-Pulegone (R)-Citronellic acid Propose a mechanism for each step in this transformation and account for the regiose- lectivity of HCI addition.arrow_forwardGamma(y)-amino butyric acid (GABA) is a neurotransmitter (a chemical that is used to send signals from one neuron to another) of the mammalian central nervous system. In order to understand how GABA works, conformationally restricted analogues, such as compound 1, have been made. During a synthesis of compound 1, compound 2 was subjected to allylic bromination using NBS and a radical initiator (AIBN) instead of light (Aust. J. Chem. 1981, 34, 2231-2236). H₂N. CH3 GABA CO₂H CH3 dddd CH3 H₂N Modify the structures given below to draw all eight possible allylic bromides that can be formed when compound 2 undergoes allylic bromination, considering all possible regiochemical and stereochemical outcomes. You can use the single bond tool to add/remove pi bonds. CH3 CO₂H CH3 solddd CH3 CH3 2 CH₂ CO₂Etarrow_forwardThe pKa of p-cyclopropylbenzoic acid is 4.45 . Is cyclopropylbenzene likely to be more reactive or less reactive than benzene toward electrophilic brornination? Explain.arrow_forward
- Which set of reagents would be appropriate to synthesize bromobenzene from benzene? 1. HNO3 in H2SO4; 2. H2Cr04 and heat 1. H2CrO4 and heat; 2. H2 Pd/C Br2 and FeBr3 1. CH3CH2CHCI and AICI3; 2. H204 and heat 4B12 and Fe Heat and Br2 Br2, HCIarrow_forwardThe Dess–Martin reaction reacts an alcohol with the Dess–Martin periodinane. The first step displaces one of the acetate groups on the periodinane with the alcohol. A base then deprotonates one of the alpha protons, forming a new carbonyl bond, iodinane and acetic acid. The oxidation stops at this stage to give the aldehyde. Both Swern and Dess–Martin conditions will also convert a secondary alcohol to a ketone. Now apply what has just been discussed. Draw the major organic product.arrow_forwardExplain why the ERC and ERO of 1,3,5-cycloheptatriene have an equilibrium constant of almost 1. Put another way, why are the ring opening/closing reactions in equilibria at room temperature?arrow_forward
- Rimantadine was among the first antiviral drugs to be licensed in the United States to use against the influenza A virus and to treat established illnesses. It is synthesized from adamantane by the following sequence: CH₂=CHBr AlBr3 (2) Adamantane =D₂.-6. (3) -Br Br (4) Ø Br₂ (1) a Step 2 proceeds via the following mechanism: 1-bromoadamantane (5) Br SnF ChemDoodle Rimantadine 1. AlBr, acts as a Lewis acid to yield carbocation 1; 2. Bromoethene acts as a nucleophile to give carbocation 2; 3. Carbocation 2 reacts with nucleophile 3 to give the product of reaction 2. Work out this mechanism on a separate sheet of paper and then draw the structure of nucleophile 3. NH₂ ==starting points == ✔arrow_forwardUsing the pKa values of the conjugate acids of the leaving groups (the pKa of HBr is -9, and the pKa of H2O is 15.7), explain the difference in reactivity between CH3Br and CH3OH in a nucleophilic substitution reactionarrow_forward(a)Which compound/s will produce an orange precipitate upon reaction with 2,4-DNPH? (b)Which compound/s will test positive towards Baeyer’s test? (c)Which compound/s will produce a brick-red precipitate upon reaction with Fehling’s reagent (CuSO4, tartrate, NaOH)? (d)Which compound/s will test positive towards the Iodoform test?arrow_forward
- f) Alkene X can be decomposed with hydrogen peroxide catalyzed by sodium tungstate to substance Q. This can be further degraded by iodoform reaction to substance R. Give the structures of substances Q and R. Xx S Na₂WO4 H₂O2 Q (C9H1603) 1: NaOH, 1₂ 2: H+ P₂O5 teplo - CHI3 R (C8H1404) P₂O5 teplo T g) The preparation of substance Q from substance X using hydrogen peroxide is a redox reaction. Identify the reductant and oxidant in this reaction, write the formal oxidation number to the atoms where it changes during the reaction and calculate the reaction. h) Substances Q and R undergo a reaction with phosphorous oxide under heating to form various products T and S. Determine the structure of substances T and S if you know their H NMR : 1H NMR (S): 2.2 (t, 2H); 1.8 (t, 2H); 1.3 (s, 6H). 1H NMR (T): 4.6 (d, 1H); 4.3 (d, 1H); 2.2 (t, 2H); 1.5 (t, 2H); 1.3 (s, 6H).arrow_forwardAmmonia and amines react with epoxides with the same stereospecificity as anionic nucleophiles. Draw a sawhorse or Newman projection formula for the product of the reaction shown, clearly showing the stereochemistry at both chirality centers. What are the Cahn–Ingold–Prelog R,Sdescriptors for these chirality centers in the reactant and the product?arrow_forward(CH3)3C-Cl reacts by an SN1 mechanism in a solvent mixture to give substitution product(s). In which of the following solvent mixtures does (CH₂)₂C-Cl react the fastest (note: water is more polar than acetone). Select one: O A. 60% water, 40% acetone B. 40% water, 60% acetone C. 30% water, 70% acetone D. 50% water, 50% acetonearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305580350/9781305580350_smallCoverImage.gif)
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning