反应详情

温度

0 °C

(2R)-2-[(2-n-pentylthiobenzthiazol-6-sulfonyl) benzylamino]propionic acid (157 mg, 0.328 mmol) prepared in Example 33 was dissolved in dichloromethane (2 mL) and cooled down to 0° C. Oxalylchloride (0.114 mL, 10 equi.) and DMF of catalytic amount were added and the reaction solution was refluxed for 3 hours at RT. After reaction, the solution was distilled under reduced pressure to remove the solvent and dried under reduced pressure to give (2R)-3-methyl-2-[(2-methylthiobenzthiazol-6-sulfonyl)amino]butanoic chloride. The compound was then dissolved in THF (1 mL) to obtain acid chloride THF solution. Hydroxyamine hydrochloride salt (0.23 g, 10 equi.) and NaHCO3 (0.33 g, 12 equi.) were dissolved in THF/H2O (3 mL/3 mL) and cooled down to 0° C. to give a hydroxyamine solution. The above acid chloride THF solution was slowly added to the hydroxyamine solution at 0° C. After 1 hour, the solvent was removed from the reaction solution. Then, the product was extracted with ethylacetate 10 mL), washed with H2O and 0.1N HCl, dried over MgSO4, distilled under reduced pressure and vacuum-dried to prepare the titled compound, (2R)-N-hydroxy-2-[(2-n-pentylthiobenzthiazol-6-sulfonyl)benzylamino]propionamide (163 mg, 100%).

1. temperaturethe reaction solution was refluxed for 3 hours at RT
2. customAfter reaction
3. distillationthe solution was distilled under reduced pressure
4. customto remove the solvent
5. customdried under reduced pressure