反应详情

温度

-78 °C

To a stirred solution of tert-butyl (4-bromonaphthalen-1-yl)carbamate (WO 2006/010082) (2.09 g, 6.48 mmol) in dry THF (50 mL) under N2 at −78° C. was added n-butyllithium (2.5 M in hexanes, 5.5 mL, 13.8 mmol) over 15 mins. The resulting mixture was maintained at −78° C. for 1.5 hr and then treated with a solution of tert-butyl (4-formylpyridin-2-yl)carbamate (WO 2004/000831) (960 mg, 4.30 mmol) in dry THF (10 mL) in one portion. The reaction mixture was stirred at −78° C. for a further 1 hr and then warmed to RT for 18 hr. The mixture was cooled to 0° C. and the reaction was quenched by the addition of MeOH (5.0 mL), then warmed to RT and partitioned between EtOAc and water. The aq layer was separated and was extracted twice with EtOAc and the combined organic extracts were washed with brine and then dried and evaporated in vacuo. The residue was purified by flash column chromatography (SiO2, 80 g, EtOAc in isohexane, 0-60%, gradient elution) to afford the title compound, Intermediate F1, as a pale yellow solid (1.13 g, 88% purity (LCMS), 49%); Rt 2.22 min (Method 2); m/z 466 (M+H)+ (ES+). The material so obtained was used in the next step without further purification.

1. temperaturewarmed to RT for 18 hr
2. temperatureThe mixture was cooled to 0° C.
3. customthe reaction was quenched by the addition of MeOH (5.0 mL)
4. temperaturewarmed to RT
5. custompartitioned between EtOAc and water
6. customThe aq layer was separated
7. extractionwas extracted twice with EtOAc
8. washthe combined organic extracts were washed with brine
9. customdried
10. customevaporated in vacuo
11. customThe residue was purified by flash column chromatography (SiO2, 80 g, EtOAc in isohexane, 0-60%, gradient elution)