反应详情

温度

-70 °C

BuLi 1.6M in hexane (46.5 ml, 0.0744 mol) was added dropwise at −70° C. to a mixture of 1-methyl-1H-imidazole (0.0744 mol) in THF (70 ml) under N2 flow. Chlorotriethyl-silane (0.0765 mol) was added dropwise at −70° C. The mixture was stirred at −70° C. for 15 minutes. BuLi 1.6M in hexane (41 ml, 0.0659 mol) was added dropwise at −70° C. The mixture was stirred at −70° C. for 15 minutes. A solution of intermediate 6 (0.0425 mol) in THF (150 ml) was added dropwise at −70° C. The mixture was stirred at −70° C. for 1 hour and poured out into water. EtOAc was added. The mixture was extracted with EtOAc. The organic layer was washed twice with water, separated, dried (MgSO4), filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel (15-35μm) (eluent: DCM/MeOH/NH4OH 97/3/0.5). The pure fractions were collected and the solvent was evaporated. Part (0.5 g) of the residue (14.6 g, 72%) was crystallized from 2-propanone/CH3CN. The precipitate was filtered off and dried under a vacuo, yielding 0.17 g of 2-chloro-4-(3-chlorophenyl)-α-(4-fluorophenyl)-α-(1-methyl-1H-imidazol-5-yl)-6-quinazolinemethanol (intermediate 7), mp. 212° C.

1. stirringThe mixture was stirred at −70° C. for 15 minutes
2. stirringThe mixture was stirred at −70° C. for 1 hour
3. extractionThe mixture was extracted with EtOAc
4. washThe organic layer was washed twice with water
5. customseparated
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. customthe solvent was evaporated
9. customThe residue was purified by column chromatography over silica gel (15-35μm) (eluent: DCM/MeOH/NH4OH 97/3/0.5)
10. customThe pure fractions were collected
11. customthe solvent was evaporated
12. customPart (0.5 g) of the residue (14.6 g, 72%) was crystallized from 2-propanone/CH3CN
13. filtrationThe precipitate was filtered off
14. customdried under a vacuo