Water → [2-[2-[(4-Chlorophenyl)sulfonyl]-2-(2,5-difluorophenyl)ethyl]phenyl]methanol

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Reaction Steps

In tetrahydrofuran (20 ml) was dissolved 2-[2-[2-[(t-butyldiphenylsilyloxy)methyl]phenyl]-1-[(4-chlorophenyl)sulfonyl]ethyl]-1,4-difluorobenzene (1.10 g, 1.66 mmol), followed by the dropwise addition of a tetrahydrofuran solution (1.0M, 5.0 ml, 5.0 mmol) of tetrabutylammonium fluoride under ice cooling. The resulting mixture was stirred at room temperature for 14 hours. After addition of water (3 ml), the residue obtained by concentrating the resulting mixture under reduced pressure was subjected to flash silica gel chromatography. The fraction obtained from the hexane:ethyl acetate=1:1 eluate was concentrated under reduced pressure to give a white solid. The white solid was washed with diisopropyl ether, whereby the title compound (595 mg, 1.41 mmol, 85%) was obtained as a white powder.

Provenance & Evidence