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Why is this Beckmann rearrangemnt useful for the synthesis of acetaminophen?
A question based on introduction to organic chemistry that is to be accomplished.
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- Paroxetine (Paxil) is an antidepressant that is a member of a family of drugs known as Selective Serotonin Reuptake Inhibitors (SSRIS). This family of drugs also includes fluoxetine (Prozac) and sertraline (Zoloft). SSRIS work by inhibiting the reuptake of the neurotransmitter serotonin in the synapses of the central nervous system follow- ing release of serotonin during excitation of individual nerve cells. Between firings, the serotonin is taken back up by a nerve cell in preparation for firing again. Inhibition of reuptake has the effect of increasing the time serotonin molecules remain in the syn- apses following excitation, leading to a therapeutic effect. In one synthesis of parox- etine, the following reagents are used. Draw the structures of synthetic intermediates A and B. F НО SOCI, A B HO PyridineList at least three (3) physical or spectroscopic methods that can be used to differentiate between benzophenone and benzhydrol. Explain how you would differentiate them. What are the most likely impurities to be found in the product of benzhydrol synthesis? How will they affect performance? How can its presence in the final product be reduced?Describe how utlraviolet (UV) spectroscopy could distinguish propiophenone from 1-phenyl-2-propanone and p-ethylbenzaldehyde. Consider their respective wavelengths at their maximum UV absorbances, (λ max).
- There are several isomeric alcohols and ethers of molecular formula C5H12O. Two of these exhibit the following 1H-NMR spectra. Propose a structure for each of the isomers. Isomer A: δ = 0.92 (t, 7.8 Hz, 3 H), 1.20 (s, 6H), 1.49 (q, 7.8 Hz, 2H), 1.85 (s, 1H) ppm Isomer B: δ = 1.19 (s, 9 H), 3.21 (s, 3H) ppm(b) The activating and deactivating groups could affect the position(s) of the next incoming group(s) to the benzene ring. Based on the structure below, analyze and explain the group(s) on the benzene ring is activating or deactivating group. Then, identify the product(s) formed from the following reactions. NH, CC, CH;CH,COCI AICI, (i) NH, HNO, H,SO, (ii) H Br AICI, (iii) Page 3 of 4Although benzene itself absorbs at 128 ppm in its 13C NMR spectrum, the carbons of substituted benzenes absorb either upfield or downfield from this value depending on the substituent. Explain the observed values for the carbon ortho to the given substituent in the monosubstituted benzene derivatives X and Y.
- Vanillic acid is the oxidized phenolic derivative of vanillin. By using Proton Nuclear Magnetic Resonance ('H-NMR) spectroscopic technique, point out the difference that can be observed between vanillin and vanillic acid in terms of chemical shift based on its chemical structures. но Он Vanillic acid VanillinPropanal and propanone react in a similar way with acidified aqueous potassium cyanide, KCN. For this reaction to occur reasonably quickly, the pH of the solution should be approximately 4. The reaction of propanal proceeds with acidified potassium cyanide proceeds more rapidly than that of propanone. Referring to the mechanism of the reactions, explain this phenomenon.Compounds A and B are isomers having the molecular formula C4H8O3. Identify A and B on the basis of their 1H NMR spectra.Compound A: δ 1.3 (3H, triplet); 3.6 (2H, quartet); 4.1 (2H, singlet); 11.1 (1H, broad singlet)Compound B: δ 2.6 (2H, triplet); 3.4 (3H, singlet); 3.7 (2H triplet); 11.3 (1H, broad singlet)
- In an attempt to synthesize compound C through a two-step process, a chemist discovered after completing the first step that they had inadvertently produced two distinct compounds, A and B. Upon examining the infrared spectroscopy (IR) results, it was observed that both A and B exhibited peaks indicative of a ketone and an ester group. Please provide the molecular structures of A and B. OEt NaOEt ΕΙΟ A B In a chemical experiment, they noticed that both components, A and B, from a combined sample turned into a new compound, C, during the following stage. The task is to determine what compound C looks like and explain how compound A or B changes into compound C through a reaction. Compound C should be the primary molecule containing carbon created in this process, not just a by-product. A B H3O+, H₂O, A Mechanism = сInterpret the acidity of alcohols on the basis of ground-state polarization and stability of the alcoholate anion(indicate and give symbols for bond polarization)! Compare the relative acidity of ethanol and 2-fluoroethanol!Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Draw all the oissuvke resonance forms of methoxybenzene, including the hybrid Based on the structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.