1) Provide synthetic schemes for the following transformations starting from benzene in high yield and with high selectivity. Please show all the steps as well as reactants and reagents required for these steps in detail. You do not have to draw reaction mechanisms. a. b. HOS Br CI NH2
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- Give the mechanistic Symbols CE1, E₂, SN, SN²) that are Con Sistent with Statemenst! most each of the following O Methyl halides react with Sodium ethoxide in eth and only by this mechanism In ethanol that contains Sodiumn ethoxide, tert-butyl bromide reacts mainly by this mechanism c) these reaction Con certed DJ these involve are mechanisms infere processes reactions mechanisms carbc cation intermedites E) Reactions proceeding by mechanisms are these Sterospecific3) 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 benzeneWhich alkene is LEAST reactive in acid-catalyzed hydration? all have equal reactivity А. В. c. D. Е.
- Identify the structure of the product in the following reaction. Provide a suitable mechanism with proper justification OTs TMS Cs,Co, NHTS Tetracyclic Compound C23H21NO2S Ph Me Of 18-crown-6 Mol. wt. 375Q12. (1-bromoethyl)benzene 1 udergoes an elimination following an E1 mechanism. Fill in the following synthetic scheme by drawing the structure of intermediate 2 and product 3. The chemical formula of product 3 is provided as guidance. CH; RDS Br C3Hg E1 2 3OM on 2-mehoxybymethod.pentan 3omethylpentane,-2,B diudl Synthesize the ether product, 2-ethoxy-4-methyl pentane by two different methods out of various methods (nucleophilic substitutions, alkoxy mercuration/demercuration, industrial method (dehydration of alcohol), and Williamson method).
- Synthesize 3,5-dibromotoluene from benzene and any suitable inorganic and organic reagents. Assume you CANNOT separate ortho and para products and both isomers have to be carried through in the entire synthesis.1. (cont.) CH3 Cl- -CF3 CH;NH2 (i) H ОН ČH,CH3 CH, 1. PBr,/pyridine (j) ОН 2. NaOH/DMSO 2. Using the given starting material and any necessary reagents indicate how the following syntheses can be carried out. ОН CH;CH,CHCH3 CH,CH,CH,COH OH CH;CH,CHCH3 CH;CH,C=CH .OTS OCH3 CH3 CH3 ОН 3. Propose a mechanism that accounts for the formation of the product shown during the following observed reaction. Be sure to show all intermediates. ОН H+A. B. C. D. E. Br Br H H OH Which of these synthetic
- 19). What is the major organic product of the following reactions? LBCH COOH 2. Pyridine ? (-HB) (4) D C " & & & & &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.(i) OEt OEt 1) NaOEt 2) H3O* workup W 1) NaOEt 2) Br V Compound W can be synthesised in an excellent yield via an intramolecular Claisen reaction of 1,6-diester V. Draw the structure of product W and provide detailed reactions mechanisms to account for its formation. (ii) Draw the product X which would form upon the alkylation reaction of W with the reagents shown.