The synthesis of α,β‐unsaturated cyclohexanone resulting from the attachment of four carbon units to a ketone's carbonyl and α‐carbon atom, respectively is generally referred to as the Robinson annulation. In addition, the corresponding reaction involving a nitrogen atom is similarly called as the
aza
‐Robinson annulation. The reaction has been promoted by K
2
CO
3
under ultrasound and the solid‐supported reaction under microwave irradiation. This reaction has been applied in the synthesis of steroids.