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- Propose an efficient multistep synthesis for the transformation shown below. There is no need to show the mechanism of any step, only the reagents required for each step, and the resulting intermediate product of each step. 1ouborq sto vino noib restriction: The given reactant is your only source of carbon atoms, but you may use more than one molecule of the reactant. multiple steps + en. OaT2. Given the following sequence of reactions, draw the structure of products A and B and write a detailed reaction mechanism that explains their formation. H2N H30* A B 3. Write a detailed reaction mechanism for the following transformation. Upload your answer as an attachment. OEt OEt OEAcyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. You do not have to consider stereochemistry. Include all valence lone pairs in your answer. Do not include counter-ions, e.g., Na+, I-, in your answer. In cases where there is more than one answer, just draw one.
- In both examples below the reactants shown are combined to bring about a nucleophilic substitution (SN1, SN2) and/or elimination (E1, E2) reaction. What is the major reaction that takes place in each case? BrCH₂COCH3 CH3 CH3CH₂CCH3 NaCN CH3OH H₂O SN2 MIn both examples below the reactants shown are combined to bring about a nucleophilic substitution (Sy1, Sy2) and/or elimination (E1, E2) reaction. What is the major reaction that takes place in each case? CI CH2CI NaOH H20 SN2 E2 mixture of SN1 and E1 CH3 CI CH3OH CH3Which sequence of reactions will complete the transformation below? 1) BH3-THF, 2) NaOH, HOOH, 3) NaOEt 1) HBr, 2) ethanol, heat 1) BH3-THF, 2) HOOH, NaOH, 3) NaH (strong base), 4) ethyl iodide 1) HBr, ROOR, heat, 2) NaOEt OHBr, ethanol, heat LOCH₂CH3
- Identify the major product of the following reaction sequence. 1) [H*], H₂NNH2, (-H₂O) 2) KOH/H₂O, heat HO₂C HO₂C HO CO,H OH OH There is no reaction under these conditions or the correct product is not listed here.Indicate the correct set of reactions from the choices below that would accomplish the following synthesis MOST efficiently (Hint: what is the MAJOR product of each step). OH Br ÓCH3 target starting material 1. КОВи, 2. Br2, СН3ОН, Н2О 1. КО'Bи, 2. OsO4, H2О2, Н2О, 3. СH3ОН 1. DBN, 2. MCРВА, 3. НСІ (саt.), HOCH3 1. NaOCH3, low temp., 2. H2O2, 3. DMS 1. DBU, 2. PhCO3H, 3. NaOCH3 then HCIThe following transformation can be accomplished by reactions we have studied in this chapter and Chapter 20. Name the type of reaction used in each step.
- Draw a structural formula for the major organic product of each reaction and specify the most likely mechanism by which each is formed. (g) CH3CH2ONa++CH2=CHCH2ClethanolWhat is the major product of the following reaction? Use a line structure which means that you should not draw in H atoms and should not enter C for carbons unless necessary. Convert your answer to the InChl format and enter it as your answer. OH H3PO4, A Major product Minor product 고 고Answer the question below the reaction. H3C H3C + H₂O In the first step of the reaction mechanism, which of the following is formed? 04S H3C OH H₂C + Excess NH4C1 CH3 CH3 OH CH3 CH3 CH3 -OH CH3 CH3 (+) .OH₂ H₂SO4 CH3