DIELS–ALDER THEORY
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- DIELS–ALDER THEORY
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![reaction-diels-alder reaccion-diels-alder](/images/stories/organica-i/diels-alder/reaccion-diels-alder/reaccion-diels-alder-01.png)
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- Germán Fernández
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Diels-Alder is a stereospecific reaction, it produces a single diastereoisomer. To draw the stereoisomer formed in a Diels-Alder, three rules are followed:
![stereochemistry-diels-alder estereoquimica-diels-alder](/images/stories/organica-i/diels-alder/estereoquimica-diels-alder/estereoquimica-diels-alder-01.png)
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- Germán Fernández
- DIELS–ALDER THEORY
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Diels-Alder is a stereospecific reaction, it produces a single diastereoisomer. To draw the stereoisomer formed in a Diels-Alder, three rules are followed:
![stereochemistry-diels-alder estereoquimica-diels-alder](/images/stories/organica-i/diels-alder/estereoquimica-diels-alder/estereoquimica-diels-alder-01.png)
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- Germán Fernández
- DIELS–ALDER THEORY
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Alkynes can act as dienophiles in the Diels-Alder reaction. The reaction between diene and alkyne forms a 1,4-cyclohexadiene.
![diels-alder-alkynes diels-alder-alquinos](/images/stories/organica-i/diels-alder/diels-alder-alquinos/diels-alder-alquinos-01.png)
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- Germán Fernández
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The reverse reaction to Diels-Alder is called retro-Diels-Alder. Diels-Alder adducts decompose on heating into the diene and dienophile that formed them.
![retro-diels-alder retro-diels-alder](/images/stories/organica-i/diels-alder/retro-diels-alder/retro-diels-alder-01.png)
Read more: Inverse reaction to Diels-Alder (Retro-Diels-Alder)
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The intramolecular Diels Alder reaction occurs when the diene and the dienophile belong to the same molecule.
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Alkenes in the presence of light undergo cycloaddition reactions to form four-membered rings. These reactions are called [2 + 2] cycloadditions.
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- Germán Fernández
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Both 1,3-butadiene (4n) and 1,3,5-hexatriene (4n + 2) cyclize with light or heat to give cyclobutene and 1,3-cyclohexadiene, respectively.
Like Diels-Alder, electrocyclic reactions are concerted and stereospecific.