Dienone

A dienone is a class of organic compounds with the general formula (R2C=CR)2C=O, where R is any substituent, but often H. They are formally "derived from 1,4-diene compounds by conversion of a –CH2– group into –C(=O)– group", resulting in "a conjugated structure".

[1] Dienones can arise via tautomerism of resorcinols and some hydroxypyridines.

They function as ligands, forming metal-alkene complexes such as tris(dibenzylideneacetone)dipalladium(0).

Extensive work has been reported on cyclic dienones.

Cyclohexadienones are a significant class of dienones, the premier members being the ortho- and para-quinones.