反应详情

2-(5-((tert-butyldiphenylsilyloxy)methyl)-4-((2R,6S)-2,6-dimethylmorpholino)-2,3-difluorophenyl)-2-oxoacetic acid (Intermediate 118, 250 mg, 0.44 mmol), HATU (335 mg, 0.88 mmol), triethylamine (0.184 ml, 1.32 mmol) and 2.0M dimethylamine (0.440 ml, 0.88 mmol) in THF were stirred in DMF (5 ml) in a closed vial for 16 hours. The reaction was diluted with water and extracted 3× with ethyl acetate. The organic layers were washed 3× with brine, dried over MgSO4 and concentrated to give an oil. The oil was purified by silica gel column chromatography using a gradient of hexanes to ethyl acetate. Fractions were combined and concentrated to give the title compound (195 mg, 0.328 mmol, 74.5%)

1. extractionextracted 3× with ethyl acetate
2. washThe organic layers were washed 3× with brine
3. dry with materialdried over MgSO4
4. concentrationconcentrated
5. customto give an oil
6. customThe oil was purified by silica gel column chromatography
7. concentrationconcentrated