反应详情

To a suspension of the compound 352 (200 mg, 0.256 mmol) in DCM (10 ml) was added HCl in dioxane (0.7 ml, 10.95 eq, 2.80 mmol, 4M in dioxane) and the reaction mixture was stirred at RT for 3 hours. The mixture wad diluted with water and solid NaHCO3 was added. The reaction mixture was extracted with EtOAc then the organic phase was collected, dried over Na2SO4, filtered and concentrated. Purification of the residue by column chromatography (eluent 30% MeOH in EtOAc) afforded the desired compound 353 as pale yellow powder (155 mg, 89% yield). 1H NMR (d6-DMSO) 9.36 (s, 1H), 8.60 (s, 1H), 8.49 (m, 1H), 8.01 (m, 1H), 7.87 (s, 1H), 7.71 (m, 1H), 7.41 (t, J=8.99 Hz, 1H), 7.31 (m, 1H), 7.20 (m, 1H), 7.02 (m, 1H), 6.98 (s, 1H), 6.65 (d, J=5.09 Hz, 1H), 4.83 (d, J=15.65 Hz, 1H), 4.48 (d, J=15.65 Hz, 1H), 3.81 (s, 1H), 3.80 (s, 2H), 3.40 (m, 1H), 3.39-3.295 (m, 6H), 1.71 (m, 2H), 0.81 (m, 6H).

1. additionwas added
2. extractionThe reaction mixture was extracted with EtOAc
3. customthe organic phase was collected
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification of the residue by column chromatography (eluent 30% MeOH in EtOAc)