反应详情

温度

-78 °C

Under a stream of argon, 3.5 ml of a pentane solution containing 5.2 mmol of tert-butyl lithium was slowly added to 15 ml of tetrahydrofuran cooled to −78° C., and 10 ml of tetrahydrofuran in which 0.61 g of 2-(4-bromophenyl)pyridine was dissolved was further added dropwise to this solution. After stirring at −78° C. for 30 minutes, 1.64 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 1.00 g portion of 2-(4-bromophenyl)-4,6-bis(4-tert-butylphenyl)-1,3,5-triazine prepared in Reference Example 1 and 0.12 g of tetrakis(triphenylphosphine) palladium(0) were dissolved in 35 ml of tetrahydrofuran and added to this solution, followed by stirring under heating reflux for 13 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:dichloromethane=3:2 to 4:3) and then again recrystallized from dichloromethane-methanol to obtain a white solid of the intended 2,4-bis(4-tert-butylphenyl)-6-[4′-(2-pyridyl)biphenyl-4-yl]-1,3,5-triazine (1.00 g, yield 87%). Its melting point and glass transition temperature are shown in Table 4.

1. additionwas further added dropwise to this solution
2. stirringstirred at −78° C. for 10 minutes
3. waitat room temperature for 2 hours
4. additionadded to this solution
5. stirringby stirring
6. temperatureunder heating
7. temperaturereflux for 13 hours
8. concentrationThe reaction solution was concentrated under a reduced pressure
9. customthe thus obtained solid was recrystallized from dichloromethane-methanol
10. customThe thus obtained crude product
11. customwas purified by a silica gel column chromatography (eluting solution hexane:dichloromethane=3:2 to 4:3)
12. customagain recrystallized from dichloromethane-methanol