Show how the following compound could be prepared from the given starting material, which requires a protecting group. Select the appropriate reagents A, B, C and D for each synthesis step from the scrollable lists. Br H A B H ནག་ OH A Choose... B Choose... C Choose... ÷ D Choose...
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- Propose a pericyclic mechanism to account for the following transformation:1.When 2-methyl-1-butanol is dehydrated in an acid medi- um to an alkene, it yelds mainly 2-methyl-2-butene rather than 2-methyl-1-butene. This indicates that the dehydra- tion to an alkene is at least a two-step reaction. Suggest a mechanism to explain the reaction.a) b) O₂N of Draw the product of the first step as well as the second step including stereoisomers OH 1) BH3, THF 2) H3O+ 2) 1) KCN/HCN aja. ,NEt3
- a) Show the structure of the reagent needed for this transformation and the mechanism for its synthesis using Ph3P and BuLi. ? CH₂ b) Show the mechanism for the reaction in (a) using the reagent that you provided.Identify compounds A – E of the reaction sequence shown in Scheme III, making sure to include stereochemistry as appropriate.a) Identify compound A in Scheme III. b) Identify compound B in Scheme III. c) Identify compound C in Scheme III. d) Identify compound D in Scheme III. e) Identify compound E in Scheme III.What alkene is needed to synthesize the following 1,2-diol using the given reagents? Be sure to answer all parts. CH3CH₂CH2 [1] OsO4 followed by NaHSO3 in H₂O: [2] CH3CO3H followed by "OH in H₂O: H OH OH CH₂CH₂CH3 draw structure... draw structure ...
- d) . . ) What reagents are necessary for the following transformation? No Mechanism OH H3C 1) надион 2) 3) H2O+3) Show how you would synthesize the following Compounds, storting with benzene or toluene ond ASSume any necessory pro duct (ond seperoble from ortho) in ortho, pora reogents, poro is the mogor mixture c)o- chlorobenzoic ocid d) m- chloronitro benzeneAlthough diazomethane (CH2N2) is often not a useful reagent forpreparing cyclopropanes, other diazo compounds give good yields ofmore complex cyclopropanes. Draw a stepwise mechanism for theconversion of diazo compound A to B, an intermediate in the synthesisof sirenin, the sperm attractant produced by the female gametes of thewater mold Allomyces.
- 7. Provide the synthesis for the following product starting with the provide starting material. More than one step is required. Show the mechanism for each reaction. CI- Cl- Starting Material ProductSYNTHESISI Show how the compound below can be synthesized efficiently from benzene, propane, and any necessary reagents. Assume that you can separate ortho and para isomers, if both are formed in any step. NH,Devise a synthesis of (E)-tetradec-11-enal, a sex pheromone of the spruce budworm, a pest that destroys r and spruce forests, from acetylene, Br(CH2)10OH, and any needed organic compounds or inorganic reagents.