TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (A), comprises (i) carrying out lithiation of 5,5-dimethyl-5,10-dihydrodibenzo(b,e)siline compounds of formula (VI), carrying out silylation and again carrying out lithiation to obtain (5,5-dimethyl-10-(trimethylsilyl)-5,10-dihydrodibenzo(b,e)silin-10-yl)lithium compounds of formula (VII), (ii) reacting (VII) with aromatic ketone compounds of formula (VIII), benzaldehyde compounds of formula (IX) or silylated fused aryl compounds of formula (X), (iii) carrying out Scholl reaction or photocyclic reaction of obtained product of the step (ii), and (iv) carrying out borylation (preferably transmetallation with boron tribromide) of obtained compound of the step (iii) to obtain final product. Preferred Method: Preparation of (V), comprises (i) carrying out lithiation of 9,10-dihydroanthracene compounds of formula (XI), and then carrying out silylation to obtain 9,10-bis(trimethylsilyl)-9,10-dihydroanthracene compounds of formula (XII), (ii) carrying out lithiation of (XII) and reacting with two compounds (VIII), (iii) carrying out Scholl reaction or photocyclic reaction of obtained product of the step (b), and (iv) carrying out borylation (preferably transmetallation with boron tribromide) of obtained compound of the step (c) to obtain final product. The reaction in the steps (ii) is Peterson olefination. The photocyclic reaction is carried out using iodine and propylene oxide under UV light. In the step (iv), carrying out arylation or alkylation after borylation. (VIII) are produced by oxidizing (VI). Preferred Components: (A) are oxidized or reduced reversibly.Y1=single bond, carbonyl, CR2R5, NR2, S, O or Si(CH3)2; andR6=H, 1-10C alkyl, 2-10C alkenyl, 2-10C alkynyl or optionally substituted 6-20C aryl (preferably substituted phenyl). Preferred Definitions:    R1,R2=2,4,6-triisopropylphenyl or mesityl; and    R4=tert-butyl or diphenylamine.    SPECIFIC COMPOUNDS - 7 Compounds (I) are disclosed e.g. 2,5,9,12-tetra-tert-butyl-7,14-di(mesityl)-7H,14H-7,14-dibora-phenanthro(1,10,9,8-opqra)perylene (Ia), 5,9-di-tert-butyl-7-mesityl-7H,14H-7-bora-14-oxa-phenanthro(1,10,9,8-opqra)perylene, 8-mesityl-6,9-di-tert-butyl-8H-8-bora-benzo(gh)naphtho(1,2,3,4-pqr)tetraphene, 6,10-di-tert-butyl-8-mesityl-3-methyl-8H-8-bora-benzo(gh)tetraphene and 2,6-di-tert-butyl-4-mesityl-9-methyl-4H-4-bora-dibenzo(gh,pqr)tetraphene.    EXAMPLE - 1 g 2,7-Di-tert-butyl-9,10-dihydro-9,9-dimethyl-10-trimethylsilyl-9-silaanthracene was reacted with 847 mg 2,7-Di-tert-butyl-9,10-dihydro-9,9-dimethyl-9-silaanthracene-10-one in tetrahydrofuran to obtain 879 mg 9-(3,6-di-tert-butyl-10,10-dimethyl-10-silaanthracen-9-yliden)-3,6-di-tert-butyl-10,10-dimethyl-10-silaanthracene, then 833 mg 9-(3,6-di-tert-butyl-10,10-dimethyl-10-silaanthracen-9-yliden)-3,6-di-tert-butyl-10,10-dimethyl-10-silaanthracene was reacted with 20 ml propylene oxide in presence of 650 mg iodine in toluene under UV light to obtain 588 mg 2,5,9,12-tetra-tert-butyl-7,7,14,14-tetramethyl-7H,14H-7,14-disila-phenanthro(1,10,9,8-opqra)perylene, and 300 mg 2,5,9,12-tetra-tert-butyl-7,7,14,14-tetramethyl-7H,14H-7,14-disila-phenanthro(1,10,9,8-opqra)perylene was reacted with 0.8 ml boron tribromide and mesityl-magnesium bromide to obtain 116 mg (yield of 29%) 2,5,9,12-tetra-tert-butyl-7,14-di(mesityl)-7H,14H-7,14-dibora-phenanthro(1,10,9,8-opqra)perylene.