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Week_7.2_PurpleBook_Answers

Week_7.2_PurpleBook_Answers - 184 Putting It Together...

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OH OH O Putting It Together: Pericyclic Reaction Mechanisms 1. Provide a curved-arrow mechanism for each of the following transformations. These are all thermally initiated reactions, so make sure each pericyclic reaction is allowed! O O O O O O heat O + OH heat heat H H O O O 6e thermal DIS Diels-Alder (gives stereochem and endo selectivity) O O O H [3,3] sigma- tropic [3,3] sigma- tropic [3,3] sigma- tropic H + transfer OH OH OH O O OH + [3,3] sigma- tropic H + transfer, then elimination Tautomerize enol -> ketone Aldol H 2 O Week 7 184
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