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Chemistry LibreTexts

Cope Rearrangement

The Cope rearrangement, not to be confused with the Cope elimination, is the conversion of a 1,5-diene to a more stable, constitutionally isomeric 1,5-diene at a very high temperature​:

coperearrangement1.png

Mechanism  

The Cope rearrangement is a pericyclic reaction, as shown below:

(see also Claisen rearrangement)