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- Minor product via E1 for 2-butanol and HCl?Which of the following substituent is an ortho/para-directing deactivator? a amino group b halogen group c phenyl group d carboxyl groupChemistry Please help explain this textbook question: Although N, N -dimethylaniline is extremely reactive toward electrophilic aromatic substitution and is readily substituted by weak electrophiles, such as diazonium and nitronium ions, this reactivity is greatly diminished by the introduction of an alkyl substituent in an ortho position.
- For the following synthesis of guaifenesin, identify the nucleophile and electrophile. Name one important feature of a nucleophile and one important feature of an electrophile. 2- Methoxyphenol --------(1. NaOH, CH3OH2,OH (ethanol), 2. 3-Chloro- 1,2 propanediol (reflux, 1 hour)----> guaifenesin + sodium chlorideThe Baylis–Hillman reaction is a DABCO (1,4-diazabicyclo[2.2.2]octane) catalyzed reaction of an a,b-unsaturated carbonyl compound with an aldehyde to form an allylic alcohol. Propose a mechanism for the reaction. (Hint: DABCO serves as both a nucleophile and as a base in the reaction.)Several sulfonylureas, a class of compounds containing RSO2NHCONHR, are useful drugs as orally active replacements for injected insulin in patients with adult-onset diabetes. These drugs decrease blood glucose concentrations by stimulating b cells of the pancreas to release insulin and by increasing the sensitivity of insulin receptors in peripheral tissues to insulin stimulation. Tolbutamide is synthesized by the reaction of the sodium salt of p-toluenesulfonamide and ethyl N-butylcarbamate . Propose a mechanism for this step.
- Which of the following does not support a nucleophilic attack of a covalent catalysis? a. Hydroxyl b. Sulfhydryl c. Imidazole d. Amino e. Methyl1. Put these three common types of carbonyl compound in order of decreasing reactivity ester amide acid chloride 2. For the least reactive, show the interconversion to its other resonance form: How does this electron delocalisation make it stable? 3. For the most reactive, draw the mechanism of its undergoing hydrolysis (reaction with H2O): Why makes this type of carbonyl so reactive to nucleophiles?Which or which of the statements given below is correct. I) Maleic anhydride is a carboxylic acid derivative and its reaction with water is a reduction reaction. II) Fumaric acid and maleic acid are stereoisomers of each other III) Since fumaric acid has a more stable structure than maleic acid, its boiling point is higher. A. Solo I B. I and III C. II and III D. I, II, III E. Solo III
- 2 Draw structures to correspond with the following common and systematic names:(a) phenyl formate (b) cyclohexyl benzoate (c) cyclopentyl phenylacetate(d) N-butylacetamide (e) N,N-dimethylformamide (f) benzoic propionic anhydride(g) benzamide (h) g-hydroxyvaleronitrile (i) a-bromobutyryl chloride(j) b@butyrolactone (k) phenyl isocyanate (l) cyclobutyl ethyl carbonate(m) d@caprolactam (n) trichloroacetic anhydride (o) ethyl N-methyl carbamatewhat is the structure of o-methylphenoxide anion and what is its pKa?Following is an outline of a synthesis of the bronchodilator carbuterol, a beta-2 adrenergic blocker with high selectivity for airway smooth muscle receptors. Q.Why is it necessary to add the benzyl group, PhCH2—, as a blocking group in Step 1?