2. Provide a complete curved-arrow mechanism for each of the following transformations ed on 2 KO'Bu...
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
15. Provide a curved arrow mechanism for each of the following transformations. OH (a) CH3ONa CH3OH HBO Br (b)
15. Provide a curved arrow mechanism for each of the following transformations. OH (a) fyr CH3ONS CH3OH as HBr Br (b)
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...
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
2. For each of the following transformations, draw the major organic product, and provide a complete curved-arrow mechanism to account for its formation HOOH Der HOOH TH Hi cat Major Organic Product b. Meo Ome Hot HOW Major Organic Product
a) Provide a complete curved arrow mechanism for the following reaction. Include the generation of the active electrophile from the reagents given. (8 points) Brą, FeBry Br
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
complete the following mechanism by adding curved arrow
nottation to each step
I. Draw the complete curved-arrow mechanism for each of the following NaNH2