反应详情

To a flask containing 6-bromo-4-chloro-2-methoxy-3-(4-(trifluoromethyl)benzyl)quinoline (3.0 g, 6.97 mmol, Intermediate 5: step d) was added THF (40 mL) and the solution was cooled to −70° C. n-BuLi (2.5 M in hexanes, 2.8 mL, 7 mmol) was then added dropwise. After 2 minutes, 1-methyl-1H-imidazole-5-carbaldehyde (1.2 g, 9 mmol, in 10 mL THF) was introduced. After 15 minutes, the dry-ice bath was replaced with a 0° C. bath. After 35 minutes the reaction mixture was quenched with aqueous NH4Cl solution and the aqueous portion was extracted with EtOAc:THF (10:2, 5×50 mL). The combined organics were washed with brine, dried over Na2SO4, filtered and concentrated to dryness. Chromatography on silica gel (30% acetone-DCM increasing to 5% MeOH) provided the title compound.

1. additionwas then added dropwise
2. waitAfter 15 minutes
3. customwas replaced with a 0° C.
4. customAfter 35 minutes the reaction mixture was quenched with aqueous NH4Cl solution
5. extractionthe aqueous portion was extracted with EtOAc:THF (10:2, 5×50 mL)
6. washThe combined organics were washed with brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated to dryness