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- What type of sigmatropic rearrangement is illustrated in each reaction?For butenafine, develop a synthesis that starts with napthalene and benzene. (aromatic methyl groups can be converted to alkyl bromides using Br2/light, and aldehydes by heating the alkyl bromide in DMSO, eg. ArCH3 to ArCH2Br then to ArCHO).Choose one from each parenthesis. Based on the reactions below, the probable structure of alkene 1 is (BAT / MAT / SAT / FAT) while the process using Reagent1 is (reaction via acidic KMnO4 / reaction via cold, dilute, neutral KMnO4 / Ozonolysis) and that of Reagent2 is (reaction via acidic KMnO4 / reaction via cold, dilute, neutral KMnO4 / Ozonolysis).
- Give the reagents and conditions to provide the following transformations, usethe 1. 2. etc. notations as appropriateFill in the reagents a–c that are missing from the following scheme. Specify if any reaction conditions required in each step:An inexperienced graduate student treated dec-5-ene with borane in THF, placed the flask in a refrigerator, and left for aparty. When he returned from the party, he discovered that the refrigerator was broken and that it had gotten quite warminside. Although all the THF had evaporated from the flask, he treated the residue with basic hydrogen peroxide. Tohis surprise, he recovered a fair yield of decan-1-ol. Use a mechanism to show how this reaction might have occurred.(Hint: The addition of BH3 is reversible.)
- Give the structure of the product(s) for each step of the following reaction sequence.Give the major organic product(s) for each step of the following reaction2. In not more than three (3) sentences, explain why terminal alkynes are acidic.3. What impurities are removed when acetylene gas is made to pass through an acidifiedsolution of CuSO4?4. Explain the difference in the rate of free radical bromination reactions of toluene and cyclohexane.
- Which of the synthetic procedures shown in Image 31 would carry out the following transformation? A. b B. c C. a D. d1. Complete the following reaction schemes by adding the appropriate reactant(s), reagent(s), conditions, and/or major product(s). Make sure to indicate the proper regiochemistry and stereochemistry when necessary:A key step in the synthesis of naproxen, an NSAID more commonly known by its brand name, Aleve (Section 3.9), is a coupling reaction of 2-bromo-6-methoxynaphthalene to form 2-methoxy-6-vinylnaphthalene. Show three different coupling reactions, and the required reagents, that could be used tocarry out this step.