反应详情

To a solution of 0.77 mL (19.3 mmol) of 2-butynl-ol and 0.18 g (4.37 mmol) of sodium hydroxide were heated at 100° C. for one hour. [(6-chloro-pyridine-3-sulfonyl)-methyl-amino]-acetic acid tert-butyl ester (1.0 g, 3.12 mmol) was added to this solution. Additional butynol was added to facilitate stirring, and the reaction was stirred at 100° C. overnight. The reaction was cooled, diluted with water, and washed with ethyl acetate. The aqueous layer was acidified with 2N HCl, and extracted with ethyl acetate (2×). The combined organics were washed with brine, dried over MgSO4, concentrated to solids which were slurried in 1:1:1 dichloromethane:hexane:ethyl acetate to afford 0.41 g (45%) of [(6-but-2-ynyloxy-pyridine-3-sulfonyl)-methyl-amino]-acetic acid as an off-white solid. Electrospray Mass Spec 299.0 (M+H)+.

1. stirringthe reaction was stirred at 100° C. overnight
2. temperatureThe reaction was cooled
3. washwashed with ethyl acetate
4. extractionextracted with ethyl acetate (2×)
5. washThe combined organics were washed with brine
6. dry with materialdried over MgSO4
7. concentrationconcentrated to solids which