Author's Organization：The Chemical Research Institute of Non-Aqueous Solutions, Tohoku University The Chemical Research Institute of Non-Aqueous Solutions, Tohoku University
The reaction of 1 : 3 mole ratio of 6-dimethylamino-3, 4-fulvene dicarboxaldehyde or 6-hydroxy-3, 4-fulvenedicarboxaldehyde and malononitrile, in the presence of base, easily formed stable cyclopentadienyl salt derivatives.
