反应详情

To a slurry of LiAlH4 (100 mg; 2.64 mmol) in THF (4 mL) was added a solution of tert-butyl 2-(4-(6-fluoro-1-(phenylsulfonyl)-1H-indol-3-yl)-1H-pyrazol-1-yl)ethylcarbamate (Intermediate 18; 300 mg; 0.62 mmol) in THF (6 mL) dropwise under argon. The reaction mixture was stirred at r.t. overnight and then at reflux for 4 hours. The reaction was added sequentially water (0.1 mL), 10% aqueous NaOH (0.2 mL), water (5 mL), filtered and washed with EtOAc. The filtrate was extracted with EtOAc (30 mL×2). The combined organic layers were dried over anhydrous Na2SO4, filtered, concentrated, and purified by a silica gel chromatography (DCM/MeOH=20/1) to afford the 94 mg (62%) of title compound as a yellow solid.

1. temperatureat reflux for 4 hours
2. filtrationfiltered
3. washwashed with EtOAc
4. extractionThe filtrate was extracted with EtOAc (30 mL×2)
5. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. custompurified by a silica gel chromatography (DCM/MeOH=20/1)