TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Preparation of (I) comprises converting halogen based substituted tetraarylbenzene compounds of formula (II) in the presence of palladium catalyst to obtain substituted tetraarylbenzene compound (Ib) (representation of (I)).hal=halo. ACTIVITY - Antipsoriatic; Dermatological; Keratolytic; Antiulcer; Vulnerary; Antiseborrheic; Hepatotropic; Cytostatic; Antiinflammatory; Antiarthritic; Antirheumatic; Analgesic; Osteopathic; Antiallergic; Virucide; Antidepressant; Hypnotic; Antibacterial.    MECHANISM OF ACTION - None given.    SPECIFIC COMPOUNDS - 127 Compounds (I) are disclosed e.g. 9-(3-(3,5-bis(4-tert-butylphenyl)-4-phenyl-phenyl)phenyl)-10-(1-naphthyl)anthracene of formula (Ia), 9-(1-naphthyl)-10-(3-(2,4,6-triphenylphenyl)phenyl)anthracene, 4,6-bis(4-tert-butylphenyl)-2-(3-(10-(1-naphthyl)-9-anthryl)phenyl)-5-phenyl-pyrimidine, 9-(1-naphthyl)-10-(3-(2,4,6-triphenylphenyl)phenyl)anthracene and 5-(10-(3-(3,4,5-triphenylphenyl)phenyl)-9-anthryl)benzo(b)phenanthrene.    EXAMPLE - n-Butyl lithium (8.8 ml) was drop-wise added to a suspension of compound 2-(3-bromophenyl)-1,3,5-triphenyl-benzene (10 g) in tetrahydrofuran (500 ml) at -78 degrees C and stirred for 1 hour. Further, triisopropyl borate (5.1 ml) was added, stirred for 2 hours at -78 degrees C and heated for 1 hour at room temperature. After cooling to 0 degrees C, 0.2 N hydrochloric acid (200 ml) was added drop wise and ethyl acetate (300 ml) was added. The aqueous phase was separated and extracted twice with ethyl acetate (200 ml). The combined organic phases were washed with water (200 ml), saturated sodium bicarbonate solution (200 ml) and saturated sodium chloride solution (200 ml), dried with sodium sulfate and evaporated to dryness. The resulting colorless solid was stirred in hot heptane/toluene mixture, extracted and dried at reduced pressure to obtain (3-(2,4,6-triphenylphenyl)phenyl)boronic acid (7.08 g). 4-(10-Bromo-anthracen-9-yl)-benzo(a)anthracene (900 mg), (3-(2,4,6-triphenylphenyl)phenyl)boronic acid (880 mg) and 2M sodium carbonate solution (3.5 ml) were suspended in toluene (15 ml) and ethanol (15 ml). Further, tetrakis(triphenylphosphine)palladium(0) (30 mg) was added and refluxed for 16 hours. After cooling, the organic phase was separated, washed three times with water (20 ml) and washed once with saturated sodium chloride solution (20 ml), dried with sodium sulfate and then evaporated to dryness. The residue was filtered with a heptane/ethyl acetate mixture (9:1) on silica gel and evaporated to dryness. The obtained solid was recrystallized twice using toluene/ethanol mixture and dried at reduced pressure to obtain (1.18 g).