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15. Provide a curved arrow mechanism for each of the following transformations. OH (a) CH3ONa CH3OH...
15. Provide a curved arrow mechanism for each of the following transformations. OH (a) fyr CH3ONS CH3OH as HBr Br (b)
3. Provide a complete curved-arrow mechanism for each of the following transformations OH 에 HAOLO 1. NaOH cat 2. NaBH, MOH - HO HOON N (Hint: recall from lecture that sugars like this often exist as hemiacetals!) no HO CN NaCN, ETOH 80 °C T
provide a curved arrow mechanism for the following SN1 reaction Extra Credit 10 points 23. Provide a curved arrow mechanism for the following Sn1 reaction. OH HBO
2. Provide a complete curved-arrow mechanism for each of the following transformations ed on 2 KO'Bu BUOH Etoo (1 equiv)
Chemistry 12A Substitution and Elimination Reactions 1. Provide complete curved-arrow mechanisms for the following transformations, Label the overall mechanism as: E1, E2, S,2, or Sy1 and explain in 1 sentence WHY that mechanism is favored. Br OH OH Br кови Hао Br "ОН conc. H2SO4 "Он
6. Draw the (curved arrow) mechanism for the following transformations. Be sure to rationalize the stereo- and regiochemistry (if any) in each case. + HBr Br Br Br Br2 CH2Cl2 Br
Please answer in detail 6. Draw the (curved arrow) mechanism for the following transformations. Be sure to rationalize the stereo- and regiochemistry (if any) in each case. + HBr Br Br Br Brz CH,Cl2 "Br
Predict the product and provide a stepwise curved arrow mechanism for the following reaction. OH OH H2SO4 heat
4. Provide a complete curved-arrow mechanism for each of the following transformations involving conjugate addition Note that no stereochemistry is shown or implied in any of these reactions, and you may neglect it in your mechanisms as well. a. For this mechanism, you may assume that the reagent NaBH.CN behaves just like NaBHs, and that it preferentially performs 1,4-addition to unsaturated carbonyl compounds. O ! OME OMe H 1. NaOE, ETOH 2. NaBH CN, MOH oMe ОMe OME OME EtOXOE...
Provide a curved arrow mechanism for the reaction OH NaOH (aq) OH