Packaging 5 g in glass bottle Application Can be coupled with glyoxals in a one-step route to 4-hydroxycyclopentanones.1 Also used to prepare 2H-pyran-2-ones from oxazolones.2 Reactant for stereoselective synthesis of: • Polysubstituted cyclopentanones via double Michael addition reactions • Hydroindanes via asymmetric quadruple aminocatalytic three-component domino condensation and spirocyclization • Oxocyclohexenecarboxylates by cyclocondensationReactant for preparation of: • γ-(Dioxobutylidene)butenolides • Chain conjugated 2H-pyran-5-carboxylates • 2-Substituted pyridoacridines with antitumor activity by means of thermolysis