| 11. | Diels-Alder reactions occur between a conjugated diene and an alkene ( commonly known as the dienophile ).
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| 12. | Partially negative atoms on the diene will bond to partially positive atoms on the dienophile, and vice versa.
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| 13. | When the substituents of the dienophile are exo, there is no interaction between those substituents and the diene.
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| 14. | This weak acid forms a diester, it undergoes additions across the double bond, and it is an excellent dienophile.
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| 15. | For this reason, benzocyclobutadiene will readily dimerize or polymerize and it reacts as a dienophile in Diels-Alder reactions.
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| 16. | The relationship is only valid for the groups on the diene alone, or the groups on the dienophile, alone.
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| 17. | This is due to the alcohol precursor dehydrating under acidic conditions to produce both the diene and dienophile required for this reaction.
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| 18. | A pyranone was similarly used as the dienophile by K . C . Nicolaou's group in the total synthesis of taxol.
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| 19. | In intramolecular Diels-Alder Reaction, asymmetric induction can be induced through allylic 1, 3 strain on the diene or the dienophile.
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| 20. | One cannot predict, via this principle, whether a substituent on the diene will be syn or anti to a substituent on the dienophile.
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