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Unformatted text preview: [c] Draw the syndiotactic form for the structure shown above. 4. [a] Formulate a mechanism to show how the structures shown below are interconverted. Hint: Use your knowledge concerning benzylic cations. [b] Why does the equilibrium lie to the right? catalytic H 5. Use Grignard chemistry to show how each of the structures shown below could be synthesized [a review from last Friday]. OH OH OH O 6. [Note: Each of the transformations shown below has its counterpart in carbohydrate chemistry. Be aware of this as you study carbohydrates.] Provide reagents that would allow each of the transformations shown below to take place efficiently. CHO OH CHO CO 2 H O OCH 3 O Ph note: CH 2 Ph = benzyl. sometimes abbreviated "Bn" O note: CH 3 O = acetyl, abbreviated "Ac"...
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- Spring '09