Dienone

A dienone is a class of organic compounds that are formally "derived from diene compounds by conversion of a –CH2– groups into –C(=O)– group .", resulting in "a conjugated structure". The class includes some heterocyclic compounds.

Properties
Rearrangement reaction of 6-membered cyclic dienones generate phenols through the dienone–phenol rearrangement:
 * [[Image:DienonePhenolRearrangement.png|400px|The dienone phenol rearrangement]]