3. Provide a synthesis of the target structure on the right from the starting structure on the left, this cannot be done in one reaction, give reagents/conditions and the major organic products at each step, do not show any curved arrow pushing. a. b. C. 4. Br 'Br OH H
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- 34. Select the best synthetic sequence to accomplish the transformation shown. Br A. 1. NaOEt; 2. HBr, cold, dark; 3. H₂SO4, H₂O B. 1. NaOEt; 2. HBr hv, A; 3. KO/Bu C. 1. NaOEt; 2. HBr cold, dark; 3. KOtBu D. 1. NaOEt; 2. Br₂; 3. KOBU E. 1. NaOEt; 2. Br₂, hv 35. In the retrosynthesis shown below: which compound could be converted to the alkyne shown in a single reaction step, with the appropriate reagents? Br -Bri Br Br || ||| IV B. C. D. E. None 36. In the retrosynthesis shown below: which compound(s) could lead to the alcohol shown in a single step, with the appropriate reagents? OH IV I B. 11 C. ||| D. E. A. I & II 37. Which alkene cannot be converted into an alkyne by reacting it with 1) bromine followed by 2) an excess of sodium amide and then 3) water? || IV B. C. E. All work D. BrB3. Write a detailed mechanism for the following Knorr Synthesis 1) (BUO-NO (0.5 equiv) , HCI A .CO2Et C14H21NO4 2) Zn, ACOHPredict the major organic product of the given reaction. Select Draw Rings More 1. NaOEt/ETOH 2. CH3CH2CH2Br 3. dilute NaOH/heat 4. H3O* 5. Нeat d orrow mechanism for the scheme by adding any missing atoms, bonds, charges,
- QUESTION 4 What conditions would be used to carry out the transformation shown? How? H. CH3 CH3 H. Oa MCPBA Ob. NBS, H0 OC.OsO, in pyridine Od. (1) Ozone, (2) Zn / acetic acid O e. KMNO, QUESTION 5 Click Save and Submit to zave and subnat. ChckSpze AlAnsuns to save alansuers. Save All Ans HIC 工Br. Br CH, -OCH,CH3 + H;C ČH, one step synthesis, the class is organic chemistry fundamentals, so the reagents are not too advance, please provide an explanation on why the selected reagents were used +1. .CI HC C: Li HC CH LICI 2. -CH3 OH Aqueous HO-S- -CH3 acetone g = SN1 Nucleophilic substitution Electrophilic a = Proton transfer addition h = SN2 Nucleophilic substitution b = Lewis acid/base e = El Elimination c = Radical chain f= E2 Elimination substitution Identify the mechanism by which each of the reactions above proceeds from the mechanisms listed. Use the letters a - i for your answers. among 1. 2.
- 1. Consider the following reaction. CI EtOH OEt a. Provide a reasonable arrow-pushing mechanism for the following reaction, showing all steps and balancing all charges. b. Predict the stereochemistry of the final product(s). c. Label the electrophilic sites on the molecule and explain why only one of them undergoes substitution.Need your help for this: Show the reaction mechanism for the formation of a. RCONH2 from the reaction of RCOOR' with NH3 b. RCOOR" from the reaction of RCOOR' with R"OH in acidic medium2. Consider the following reaction. MeOH CI b. Predict the stereochemistry of the final product(s). OMe a. Provide a reasonable arrow-pushing mechanism for the following reaction, showing all steps and balancing all charges. c. Label the electrophilic sites on the molecule and explain why only one of undergoes substitution.
- b. 2. Propose a multi-step synthesis for the following molecules. a. Br O₂N CH3 Br NO₂ CH₂CH33) Select an appropriate synthesis to lengthen the legs of "Ralph" as shown. A) 1. NBS, hv; 2. KCN; 2. HBr; 3. 2 NaCCH; 4. H2, Pt B) 1. NBS, hv; 2. NaCN; 2. HC1, ROOR; 3. 2 NaCCH; 4. H₂, Pt C) 1. NBS, hv; 2. HBr, ROOR; 3. 2 NaCCH; 4. H₂, Pt D) 1. NBS; 2. KCN; 2. HBr, ROOR; 3. 2 NaCCH; 4. H2, Lindlar's catalyst E) 1. NBS, hv; 2. KCN; 2. HBr, ROOR; 3. 2 NaCCH; 4. H2, Lindlar's catalyst10. Draw the structure of the reactant(s) or major organic product(s) of each of the following reactions or write N.R for no reaction. There can be more than one answer per box. Show the correct stereochemistry when needed! J... Brz (2 equiv.) CH₂Cl₂ Nal, acetone (excess) AgNO3, EtOH (excess) Oot NC OH H3PO4 heat