反应详情

温度

75 °C

4,6-Bis-(4-methoxy-phenyl)-2-methyl-pyrimidine 23 (0.21 g, 0.7 mmol) is dissolved in 4 mL carbon tetrachloride. N-Bromo-succinimide (0.10 g, 0.56 mmol) is added and the mixture is heated to 75° C. with stirring. Solid 2,2′-azobisisobutyronitrile (AIBN) (0.01 g, 0.06 mmol) is added and the mixture is stirred at 75° C. for 24 hours. Cooling, diluting with dichloromethane, washing with water, saturated aqueous NaHCO3, and brine, followed by drying over solid Na2SO4 and concentration yielded 2-bromomethyl-4,6-bis-(4-methoxy-phenyl)-pyrimidine 24 as an oil. It is used without further purification in the next step. 1H-NMR (400 MHz, CDCl3) δ=8.02 (d, J=8.8 Hz, 2H), 7.69 (s, 1H), 6.94 (d, J=8.8 Hz, 2H), 3.82 (s, 2H).

1. stirringthe mixture is stirred at 75° C. for 24 hours
2. temperatureCooling
3. washwashing with water, saturated aqueous NaHCO3, and brine
4. dry with materialby drying over solid Na2SO4 and concentration