A Short Route to Multiply Substituted Fluorenones

Article abstract of DOI:10.1016/S0040-4039(99)00370-6

We report a two-step synthesis of polysubstituted fluorenones by condensation of malononitrile with aromatic aldehydes and methyketones or with β-aryl-α,β-unsaturated carbonyl compounds, aldehydes or ketones. The yields of the fluorenone systems depend on the nature of the substitution on the aromatic rings.