反应详情

To a solution of ethyl (2R)-2-({6-[({5-[(tert-butylamino)carbonyl]-2-furyl}sulfonyl)amino]-2-[(2,3-difluorobenzyl)thio]pyrimidin-4-yl}oxy)propanoate (the product of step iii) (0.25 g) in THF (10 mL) was added a solution of lithium borohydride (0.6 mL, 2.0M in hexanes) dropwise at 0° C. The mixture was warmed to room temperature and stirred for 18 h. After cooling to 0° C., 1N HCl (20 mL) was added slowly, and the mixture extracted with EtOAc (3×20 mL). The combined organic layers were dried (MgSO4), filtered and evaporated to dryness in vacuo. The resulting crude oil was purified by reverse phase HPLC (75% to 5% gradient of 0.2% aqueous trifluoroacetic acid in acetonitrile as eluent) to give the title compound as a white solid. Yield: 90 mg.

1. temperatureAfter cooling to 0° C.
2. extractionthe mixture extracted with EtOAc (3×20 mL)
3. dry with materialThe combined organic layers were dried (MgSO4)
4. filtrationfiltered
5. customevaporated to dryness in vacuo
6. customThe resulting crude oil was purified by reverse phase HPLC (75% to 5% gradient of 0.2% aqueous trifluoroacetic acid in acetonitrile as eluent)