| 41. | This diene is also not expected to act as a diene in a Diels Alder reaction due to its structure.
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| 42. | His most notable work was done with Kurt Alder on the Diels Alder reaction, a method for diene synthesis.
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| 43. | Norbornene, like many of its derivatives, is made by a Diels-Alder reaction of cyclopentadiene and ethylene.
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| 44. | Thus the ability of these heterobenzenes to undergo the Diels Alder reaction with this electrophile increases down the periodic table.
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| 45. | The near synchronicity of the DA INV means it can be treated similarly to the standard Diels-Alder reaction.
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| 46. | This intermediate can then undergo a tandem Diels-Alder reaction to achieve a decent yield with 97 % ee.
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| 47. | Under these conditions singlet oxygen is generated which reacts in a Diels Alder reaction with the diene system in the terpinene.
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| 48. | For this reason, benzocyclobutadiene will readily dimerize or polymerize and it reacts as a dienophile in Diels-Alder reactions.
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| 49. | Therefore like alkenes, phosphaalkenes engage in Wittig reactions, Peterson reactions, Cope rearrangements, and Diels-Alder reactions.
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| 50. | The compounds resulting from this type of electrocyclization have been used as dienes in Diels Alder reactions to attach compounds to fullerenes.
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