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Q: Propose a mechanism for the following Cope rearrangement. OH 320"C H.
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The Cope Rearrangement is the thermal isomerization of a 1,5-diene leading to a regioisomeric 1,5-diene. The main product is the thermodynamically more stable regioisomer. The Oxy-Cope has a hydroxyl substituent on an sp3-hybridized carbon of the starting isomer.
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- Propose a mechanism for the following Cope rearrangement. OH 320"C H.Drawing a Dehydration Reaction with a Rearrangement Show how the dehydration of alcohol X forms alkene Y using a 1,2-hydride shift.00 To ws allylbenzene Treating allylbenzene with aqueous H₂SO4 causes it to rearrange to B-methylstyrene as shown below. Use curved arrow formalism to draw a mechanism for this process. 590 add 101 mengçib yanana (5691 50 werd d B-methylstyrene
- 14k. Which of the following is the least reactive toward addition of a Grignard reagent? th IV 161. A) I B) II C) III D) IV E) V 1 محمد A) 3-methyl-1-butanol B) 2-methyl-2-butanol ~ je What kind of reactions do aldehydes and ketones undergo? A) electrophilic addition B) electrophilic substitution C) nucleophilic acyl substitution D) nucleophilic addition E) radical addition ||| 16m. 31) What is the major product when (CH3)2CHCH2CH2Br undergoes the following reaction sequence? 1. Mg, ether 2. CO2 3. H3O+ ? C) 4-methyl-1-pentanol D) 4-methylpentanoic acid 16n. What reagents should be used to accomplish the following synthesis? OHMuscalure, the sex pheromone of the common housefly, can be prepared by a reaction sequence that uses two nucleophilic substitutions. Identify compounds A–D in the following synthesis of muscalure.CH3 o alengoiga6 916w vtalmedoociote 6. Plan syntheses of the following compounds. You may use the given starting material and any compound containing three or fewer carbons. () (a) Br Br Br (d) of (b) ОН ОН (o) Оама (c) (b). (d) Br C Br ОН (e) CI (e) CI CI CI
- Q6The following reactions have been used to synthesize dieldrin and aldrin (named for Diels and Alder), two pesticides having a similar story to DDT (Section 7.4). Identify the lettered compounds in this reaction scheme. C CI + x MCPBA (1 equiv) A dieldrin aldrin2:55 PM Tue Apr 5 A 61% Starting with benzene synthesize the following compound. O2N. СООН 1