##  [Diels–Alder Reaction](/diels-alder-reaction) 

  ##  [Diels–Alder Reaction](https://natural.quantumdictionary.io/diels-alder-reaction-0) 

  

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**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A [4+2] cycloaddition pericyclic reaction in which a conjugated diene reacts with a dienophile to form a six‑membered ring in a single, concerted step, typically with suprafacial bonding on both partners.