反应详情

To a solution of 4-{5-[3-(trifluoromethyl)-4-(2,2,2-trifluoro-1-methylethoxy)phenyl]-1,2,4-oxadiazol-3-yl}-1H-indole-3-carboaldehyde (150.0 mg) in CH3OH (1.5 ml) was added a 40% CH3OH solution of CH3NH2 (74.5 mg) at 0° C. After warming to room temperature, the solution was stirred at room temperature for 3 hours. After confirming the production of an iminium salt, the organic solvent was evaporated under reduced pressure. The residue was dissolved in EtOH (1.5 ml). To this was added NaBH4 (12.09 mg) at 0° C. After warming to room temperature, the solution was stirred at room temperature for 15 hours. To the reaction solution was added water (30 ml), followed by extraction three times with EtOAc (20 ml). The organic layer was combined, washed with saturated brine, dried over anhydrous MgSO4, and then filtered, and the filtrate was concentrated. The residue was purified by silica gel column chromatography (automatic purifier, chloroform:CH3OH=100:0 to 90:10) to obtain N-methyl-1-(4-{5-[3-(trifluoromethyl)-4-(2,2,2-trifluoro-1-methylethoxy)phenyl]-1,2,4-oxadiazol-3-yl}-1H-indol-3-yl)methanamine (87.4 mg) as a white solid.

1. customthe organic solvent was evaporated under reduced pressure
2. dissolutionThe residue was dissolved in EtOH (1.5 ml)
3. additionTo this was added NaBH4 (12.09 mg) at 0° C
4. temperatureAfter warming to room temperature
5. stirringthe solution was stirred at room temperature for 15 hours
6. additionTo the reaction solution was added water (30 ml)
7. extractionfollowed by extraction three times with EtOAc (20 ml)
8. washwashed with saturated brine
9. dry with materialdried over anhydrous MgSO4
10. filtrationfiltered
11. concentrationthe filtrate was concentrated
12. customThe residue was purified by silica gel column chromatography (automatic purifier, chloroform:CH3OH=100:0 to 90:10)