TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The condensation step (a) comprises condensing 1 equivalent of the aromatic aldehyde with 25 equivalents of pyrrole. (VI) is treated with 10 equivalents of N-bromosuccinimide to yield (VII). The resultant mixture of step (c) containing (V) is subjected to column chromatographic purification to afford (V) in pure form. (Va) is purified by silica gel chromatography and afforded in a yield of at least 50%. Preferred Components: The aromatic aldehyde is anisaldehyde. The oxidizing agent of step (c) is 2,3-dichloro-5,6-dicyano-1,4-benzoquinone. The organic solvent is tetrahydrofuran. The arylboronic acid is phenyl boronic acid, 4-fluorophenyl boronic acid, 4-methylphenylboronic acid or 4-methoxyphenylboronic acid. SPECIFIC COMPOUNDS - 6 Specific compounds (Va) are prepared e.g. 4,4-difluoro-8-(4-methoxyphenyl)-1,2,3,5,6,7-hexaphenyl-4-bora-3a,4a-diaza-5-indacene of formula (VA), 4,4-difluoro-8-(4-methoxyphenyl)-1,2,3,5,6,7-hexa(4-fluorophenyl)-4-bora-3a,4a-diaza-5-indacene, 4,4-difluoro-8-(4-methoxyphenyl)-1,2,3,5,6,7-hexa(4-methylphenyl)-4-bora-3a,4a-diaza-5-indacene, 4,4-difluoro-8-(4-methoxyphenyl)-1,2,3,5,6,7-hexa(4-methoxyphenyl)-4-bora-3a,4a-diaza-5-indacene and 4,4-difluoro-8-(4-methoxyphenyl)-1,2,3,5,6,7-hexa(1,4-biphenyl)-4-bora-3a,4a-diaza-5-indacene.    EXAMPLE - To a solution of 0.5 g 8-(4-methoxyphenyl)dipyrromethane in dry tetrahydrofuran, excess of 3.53 g N-bromosuccinimide was added under nitrogen atmosphere and the reaction mixture was allowed to stir at room temperature for overnight. Thin layer chromatographic analysis indicated the disappearance of spot corresponded to 2,2'-((4-methoxyphenyl)methylene)bis(1H-pyrrole) and appearance of spot to 8-(4-methoxyphenyl)dipyrromethane. The solvent was removed on a rotary evaporator under vacuum and the crude compound was passed through flash silica gel column chromatography using dichloromethane. The resultant compound was dissolved in freshly distilled dichloromethane and oxidized with 190 mg 2,3-dichloro-5,6-dicyano-1,4-benzoquinone for 30 minutes at room temperature. The reaction mixture was then treated with a small amount of 3.9 ml triethylamine followed by 4.4 ml boron trifluoride diethyl etherate and the mixture was stirred for an additional 30 minutes at room temperature. The solvent was removed in a rotary evaporator and the resultant crude compound was purified by silica gel column chromatography with petroleum ether/ethylacetate (98:2) and afforded pure hexabromo boron-dipyrromethene as green color solid in 24% (0.35g).