反应详情

At RT, 0.65 g (9.59 mmol) of imidazole, 2.42 g (8.79 mmol) of t-butyldiphenylchlorosilane and 0.10 g (0.80 mmol) of DMAP are added to 1.00 g (7.99 mmol) of the compound from Example 2A in 19 ml of DMF, and the mixture is stirred for 18 h. 180 ml of water are then added, and the mixture is kept at 0° C. for 3 h. After filtration, the residue obtained is purified by chromatography on silica gel (ethyl acetate/ethyldimethylamine 1000:1). This gives 801 mg (27% of theory) of the desired compound.

1. waitthe mixture is kept at 0° C. for 3 h
2. filtrationAfter filtration
3. customthe residue obtained
4. customis purified by chromatography on silica gel (ethyl acetate/ethyldimethylamine 1000:1)