反应详情

温度

-78 °C

Under a stream of argon, 2.1 ml of a hexane solution containing 3.2 mmol of butyl lithium was slowly added to 50 ml of tetrahydrofuran cooled to −78° C. in which 1.50 g of 2-(4-bromophenyl)-4,6-bis(4-tert-butylphenyl)-1,3,5-triazine obtained in Reference Example 1 had been dissolved. After stirring at −78° C. for 15 minutes, 0.83 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 30 ml portion of tetrahydrofuran prepared by dissolving 0.74 g of 5-bromo-2,4′-bipyridyl and 0.14 g of tetrakis(triphenylphosphine)palladium(0) therein was added to this solution and stirred under heating reflux for 13 hours. The reaction solution was concentrated under a reduced pressure and the thus obtained solid was purified by a silica gel column chromatography (eluting solution hexane:chloroform=2:1 to chloroform) and an alumina gel column chromatography (eluting solution hexane:chloroform=1:1) and then 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}-2,4′-bipyridyl (0.97 g, yield 56%). Its melting point is shown in Table 4. In this case, a distinct point of glass transition was not observed.

1. customobtained in Reference Example 1
2. dissolutionhad been dissolved
3. stirringstirred at −78° C. for 10 minutes
4. waitat room temperature for 2 hours
5. additiontherein was added to this solution
6. stirringstirred
7. temperatureunder heating
8. temperaturereflux for 13 hours
9. concentrationThe reaction solution was concentrated under a reduced pressure
10. customthe thus obtained solid was purified by a silica gel column chromatography (eluting solution hexane:chloroform=2:1 to chloroform)
11. washan alumina gel column chromatography (eluting solution hexane:chloroform=1:1)
12. customrecrystallized from dichloromethane-methanol