反应详情

To a solution of 7.06 g (0.014 mmol) of [4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-(4-but-2-ynyloxy-benzenesulfonylamino)-acetic acid methyl ester dissolved in 50 mL of DMF was added 0.618 g (0.015 mmol) of a 60% oil dispersion of sodium hydride. The reaction was stirred for 30 min at room temperature and then 2.62 mL of iodomethane was added. After 5 h the reaction was diluted with water and extracted with ether. The combined organics were washed with water, dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was chromatographed on silica gel eluting with ethyl acetate/hexanes (1:3) to provide [4-(tert-butyl-dimethyl-silanyloxy)-phenyl]-[(4-but-2-ynyloxy-benzenesulfonyl)-methyl-amino]-acetic acid methyl ester as a white waxy solid. Electrospray Mass Spec 518.4 (M+H)+

1. extractionextracted with ether
2. washThe combined organics were washed with water
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was chromatographed on silica gel eluting with ethyl acetate/hexanes (1:3)