反应详情

In tetrahydrofuran (20 ml) was dissolved t-butyl N-[2-(t-butyldiphenylsilyloxy)ethyl]-N-[3-[(4-chlorophenyl)sulfonyl]-3-(2,5-difluorophenyl)propyl]carbamate (1.13 g, 1.55 mmol). Under ice cooling, a tetrahydrofuran solution (1.0M, 5.0 ml, 5.0 mmol) of tetrabutylammonium fluoride was added dropwise. The resulting mixture was stirred at room temperature for 1 hour. Water (2 ml) was added to the reaction mixture. The residue obtained by concentrating the resulting mixture under reduced pressure was subjected to flash silica gel chromatography, and the fraction obtained from the hexane:ethyl acetate=1:1 eluate was concentrated under reduced pressure, whereby the title compound (651 mg, 1.32 mmol, 85%) was obtained as a white foam.

1. customThe residue obtained
2. concentrationby concentrating the resulting mixture under reduced pressure
3. customthe fraction obtained from the hexane