and the resulting residue was washed with methanol and petroleum ether to yield to obtain the iridium iii 1 3 methylphenyl 4 7 dimethylisoquinolinato n c 2 u2032 2 4 pentanedionate o o next a method for synthesizing iridium iii 2 3 u2032 methylphenyl 4 methylisoquinolinato n c 2 u2032 2 4 pentanedionate o o u201c a 2 u201d which is a red phosphorescent compound represented by formula 2 for use in an organic electroluminescent device 3 methylphenyl borate 1 3 mmol 2 chloro 4 methylquinoline 1 mmol tetrakis triphenylphosphine palladium o 0 05 mmol and potassium carbonate 3 mmol were dissolved in thf 30 ml and h 2 o 10 ml the resulting solution was stirred in a bath at 100 u00b0 c for 24 hours after completion of the reaction the solvents were removed the reaction mixture was extracted with dichloromethane and water and distilled under reduced pressure the resulting residue was purified by silica gel column chromatography the eluate was distilled under reduced pressure the residue was recrystallized from dichloromethane and petroleum ether and filtered to yield 1 3 methylphenyl 4 methylisoquinoline as a solid iridium iii chloride hydrate 1 mmol the 1 3 methylphenyl 4 methylisoquinoline 2 5 mmol and a mixed solvent 30 ml of 2 ethoxyethanol and distilled.