Water → Indole

In a 50 ml reaction vessel, to a solution of 4-{5-[3-(trifluoromethyl)-4-(2,2,2-trifluoro-1-methylethoxy)phenyl]-1,2,4-oxadiazol-3-yl}-1H-indole (100 mg) in DMF (1 ml) was added 60% NaH (10.9 mg) at 0° C. The solution was warmed to room temperature, followed by stirring for 0.5 hour. Further, tertiary-butyl (2-iodoethoxy)dimethylsilane was added thereto at 0° C., followed by stirring at room temperature for 15 hours. Completion of the reaction was confirmed by LC-MS, and then the reaction solution was added with water (30 ml). It was extracted three times with EtOAc (20 ml). The organic layer was washed with saturated brine, dried over anhydrous MgSO4, and concentrated under reduced pressure. It was purified by silica gel column chromatography (automatic purifier, n-hexane:EtOAc=100:0 to 90:10) to obtain 1-(2-{[tertiary-butyl(dimethyl)silyl]oxy}ethyl)-4-{5-[3-(trifluoromethyl)-4-2,2,2-trifluoro-1-methylethoxy)phenyl]-1,2,4-oxadiazol-3-yl}-1H-indole (86.4 mg) as a white solid.

1. customIn a 50 ml reaction vessel
2. customat 0° C.
3. stirringby stirring at room temperature for 15 hours
4. extractionIt was extracted three times with EtOAc (20 ml)
5. washThe organic layer was washed with saturated brine
6. dry with materialdried over anhydrous MgSO4
7. concentrationconcentrated under reduced pressure
8. customIt was purified by silica gel column chromatography (automatic purifier, n-hexane:EtOAc=100:0 to 90:10)

ORD record

ord-a78f699bc43648b9bec6085e0cc34d60

Source dataset

uspto-grants-2011_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07951825B2