Hexane → 5-{4-[4,6-Bis(4-tert-butylphenyl)-1,3,5-triazin-2-yl]phenyl}-2,2'-bipyridyl

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Reaction Conditions

Reaction Steps

Under a stream of argon, 0.35 ml of a hexane solution containing 0.55 mmol of butyl lithium was slowly added to 15 ml of tetrahydrofuran cooled to −78° C. in which 0.25 g of 2-(4-bromophenyl)-4,6-bis(4-tert-butylphenyl)-1,3,5-triazine obtained by Reference Example 1 had been dissolved. After stirring at −78° C. for 15 minutes, 0.15 g of dichloro(tetramethylethylenediamine)zinc(II) was added thereto and stirred at −78° C. for 10 minutes and then at room temperature for 2 hours. A 5 ml portion of tetrahydrofuran prepared by dissolving 0.14 g of 5-bromo-2,2′-bipyridyl and 0.03 g of tetrakis(triphenylphosphine)palladium(0) therein was added to this solution and stirred under heating reflux for 15 hours. The reaction solution was concentrated under a reduced pressure and the thus obtained solid was recrystallized from dichloromethane-methanol. The thus obtained crude product was purified by a silica gel column chromatography (eluting solution hexane:chloroform=1:1 to 0:1) and then again recrystallized from dichloromethane-methanol to obtain a white solid of the intended 5-{4-[4,6-bis(4-tert-butylphenyl)-1,3,5-triazin-2-yl]phenyl}-2,2′-bipyridyl (0.16 g, yield 56%). Its melting point and glass transition temperature are shown in Table 4.

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