To obtain a new compound useful for a red-based fluorescent coloring matter having high excellent characteristics such as emission brightness, fastness and excellent luminous efficiency suitable in the field of an organic electric field light emission element.
This compound is shown by formula [R1 to R4 are each H or a 1-4C alkyl; ring Z is a (substitute) aromatic ring] such as a compound of formula II. The compound of formula I is obtained by reacting a compound of formula III (e.g. 1,1,7,7-tetramethyl-8-hydroxy-9-formyljulolidine, etc.), with a compound of formula IV (e.g. 2-benzimidazolylacetonitrile, etc.), generally in an inert solvent such as N,N-dimethylformamide, etc., in the presence of an inorganic or an organic basic condensation agent preferably at 0-50°C for about 0.5-48 hours to synthesize a compound of formula V, then reacting the compound with malononitrile preferably at 50-200°C for 0.5-48 hours and hydrolyzing the formed compound.
MURATA YUKICHI
OGATA TOMOYUKI
SATO YOSHIHARU
