反应详情

To a solution of 5-benzyloxy-2-(4-hydroxyphenyl)pyrimidine (Sg, 0.0180 moles) (prepared essentially as in Example 1) and imidazole (2.5g, 0.0360 moles) in N,N-dimethylformamide (DMF) (50 ml) was added 2.7 g (0.0180 moles) of t-butyldimethylsilylchloride. The resulting mixture was stirred at room temperature for 4 weeks. The stirred mixture was then poured into 100 ml of dilute bicarbonate, and the resulting solid was collected by filtration. After recrystallization from methanol, the solid was hydrogenated at 60 psi (3100 torr) with catalytic 10% palladium on carbon for 48 hours. The catalyst was then removed by filtration, and the solvent was removed on a rotary evaporator to yield 2.4 g of 5-hydroxy-2-(4-(t-butyldimethylsiloxyphenyl)pyrimidine.

1. filtrationthe resulting solid was collected by filtration
2. customAfter recrystallization from methanol
3. customThe catalyst was then removed by filtration
4. customthe solvent was removed on a rotary evaporator