反应详情

To a suspension of 52 (1.2 g, 2.89 mmol) in DME (30 ml) was added 2-(methylamino)ethanol (2.17 g, 10 eq, 28.9 mmol) and the reaction mixture was stirred at RT for 2 hrs. The reaction mixture was concentrated then partitioned between EtOAc/H2O and the EtOAc was collected, dried over Na2SO4, filtered and concentrated. The crude mixture was purified by column chromatography (8:2 EtOAc:MeOH) to afford title compound 85 (813 mg, 45% yield). 1H NMR (DMSO-d6) δ (ppm): 8.57 (d, J=5.48 Hz, 1H), 8.48 (m, 1H), 8.21 (m, 1H), 8.08 (s, 1H), 7.83 (d, J=8.02 Hz, 1H), 7.71 (t, J=8.61 Hz, 2H), 7.43 (d, J=8.22 Hz, 2H), 6.91 (d, J=5.48 Hz, 1H), 4.41 (t, J=5.48 Hz, 1H), 3.53 (m, 4H), 2.42 (t, J=6.46 Hz, 2H), 2.15 (s, 3H).

1. concentrationThe reaction mixture was concentrated
2. customthen partitioned between EtOAc/H2O
3. customthe EtOAc was collected
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe crude mixture was purified by column chromatography (8:2 EtOAc:MeOH)