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- The questions that follow refer to the retrosynthesis below that uses benzene as starting material. Br Part: 0 / 2 Part 1 of 2 Draw the structures of all precursors between the target molecule and benzene for a plausible synthesis with the least number of steps.Which would be the best way to carry out the following synthesis? OH ... A) (1) t-BUOK, (2) BH3-THF, (3) H,02/NaOH/H,O В NaOH/ H2O (1) t-BuOK, (2) Н,о* (1) NaOCH3, (2) Н,о*Complete the following synthesis by dragging the suitable reagent(s) H2/Pd Na/NH3 H2O/HgSO4/H2SO4 excess NaNH2 OH 03/H2O Br2 H2/Lindlar Pd 02/H2O
- 5. Provide an efficient synthesis for the following transformation. Synthesis with the fewest steps, best yields and best selectivity will get maximum marks. Me,SiQTransform the given starting material into the desired target molecule. More than one step may be required. In order to plan a reasonable synthesis, it is a good idea to begin with a retrosynthetic analysis of the target molecule. ? Br Of the following reagents, which is (are) best to achieve the desired transformation? O t-BuOK O conc. H2SO4, heat O NaOEt O 1) TsCl, pyridine; 2) NaOEt O1) TsCl, pyridine; 2) t-BuOKTasks Complete the synthetic sequences by drawing products/substrates/reagents in empty spaces in reactions below. 1. PBr3 2. Mg, dry ether HO 3. CH3CH2C(O)CH3 4. H3O* (acid work-up) 1. MsCI, pyridine 2. CH3CH2SH, acetone ОН 1. LIAIH4 2. H30* 3. conc. H2S04, heat diluted H2SO4 'HO, ОН OH OH 'HO, racemic mixture Page 18 | 18 +
- 3. Please provide a complete step-wise synthesis of the target molecule showing all steps, reagents and intermediates. NH2Othesis. teps neceossary to synthesize this compound by yl halide; after that you can add any organic or Dound. →1-hexanol )Consider the following compounds: B = HOCH2CH2CH2CH3 CH3 HC C = CH3CH2CH2OCH2CH2CH3 D = a) Which one(s) could be reduced with NaBH4? b) Which one(s) would give a positive Tollens silver mirror test? c) Which one(s) could be oxidized with CrO3? d) Which one(s) would react with 1 or 2 equivalents CH3M9B to make a npound butyl ethyl ether larger alcohol?Section B (continued) В4. Answer all parts (i-iv). Explain the reactions and observations shown in the schemes below: Scheme 1 of + КОMe Me- C4H8 Br not observed product Scheme 2 H2SO4 nok + MEOH Me HO Your answer should address the following points: i) Explain why the SN2 reaction in Scheme 1, leading to formation of the ether does not take place. Predict the structure of the product C4H8 arising from the reaction in Scheme 1 above. ii) iii) iv) Provide the mechanism accounting for the formation of the product C4H8. Provide a rational for the formation of the ether in Scheme 2.
- 3. Provide a synthesis of the product (PDT) from the allyl ketoester starting material (SM). No mechanisms needed, but be specific about reagents and conditions for undertaking this multistep synthesis. سلام multistep sequence conditions/reagents مركم PDTFast pls in 5 min will give u like for sure Create a synthesis of the heterocyclic compound 5 from starting materials each containing no more than six carbon atoms.In the solution you should use retrosynthetic analysis to justify your choice.Several reagents and several organic structures are shown below. Construct a multistep synthetic route for the synthesis of acetylene from ethane by dragging the appropriate pieces into the bins. Note that each bin will hold only one item, and not every given reagent or structure will be used. (Stoichiometry is omitted.)