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- Draw the mechanism ffrom benzaldehyde to this using: i)NaBH4 ii)TsCl, py iii)NaCN iiii)H+, H2Oorganic chemistry 37) The most reactive towards nucleophilic acyl substitution is:There are two isomeric cyclohexa-1,4-diene products when toluene undergoes the Birch reduction (see Problem 25.24). (a) Draw the mechanism that leads to the formation of the major product. (b) Will the Birchreduction of toluene occur faster or slower than the Birch reduction of benzene itself? Hint: Is –CH3 an electron-donating or an electron-withdrawing group?
- There are two isomeric cyclohexa-1,4-diene products when benzoic acid undergoes the Birch reduction (see Problem 25.24). (a) Draw the mechanism that leads tothe formation of the major product. (b) Will the Birchreduction of benzoic acid occur faster or slower than theBirch reduction of benzene itself? Hint: Is –CO2H anelectron-donating or an electron-withdrawing group?What other alkene is also formed along with Y in Sample Problem 9.3 (Attached) ? What alkenes would form from X if no carbocation rearrangement occurred?Does cis- or trans-1-bromo-4-tert-butylcylohexane react faster in an E2reaction?
- Which of the following alkenes (a-c) reacts faster with HI?What other alkene is also formed along with Y in Sample Problem 9.3? What alkenes would form from X if no carbocation rearrangement occurred?Arrange the alkyl halides in order of increasing reactivity in an SN2 reaction with KI in acetone (least first). I, IV, III, II II, III, I, IV IV, I, III, II III, II, IV, I
- Arrange the following according to INCREASING reactivity towards E2: 1st ( least reactive)? 2nd? 3rd? 4th (most reactive)?Which nucleophile would prefer simple addition over conjugate addition? CH3MgBr NaCN CH3CH2NH2 (CH3CH2)2CuLiAny proper mechanism of hydroboration- oxidation must explain the observed____[ex anti] addition of the H and OH to the alkene as well as the____ [ex mixed markovnikov] regiochemistry