反应详情

To a solution of 1-(7-(3,4-dimethoxyphenylamino)thiazolo[5,4-d]pyrimidin-5-yl)piperidine-3-carboxylic acid (50 mg, 0.12 mmol) and 5-(4-aminophenyl)-1,3,4-oxadiazole-2-thiol (23 mg, 0.12 mmol) in pyridine (10 mL) was added POCl3 (0.3 mL, 3.29 mmol) at 0° C., the reaction mixture was stirred at room temperature for 6 hours, a sat. NaHCO3 solution was added slowly, the solvent was removed in vacuo, methanol (20 mL) were added and filtrated. The filtrate was collected, concentrated and purified by a silica column chromatography (silica gel 200-300 mesh, eluting with dichloromethane:methanol=40:1) to afford 1-(7-(3,4-dimethoxyphenylamino)thiazolo[5,4-d]pyrimidin-5-yl)-N-(4-(5-mercapto-1,3,4-oxadiazol-2-yl)phenyl)piperidine-3-carboxamide (8.0 mg, 11.3%) as a white solid. 1H NMR (300 MHz, DMSO): δ 10.42 (s, 1H), 9.67 (s, 1H), 8.86 (s, 1H), 7.86-7.78 (m, 4H), 7.66 (s, 1H), 7.35 (d, 1H, J=8.7 Hz), 6.81 (brs, 1H), 4.81 (d, 1H, J=11.7 Hz), 4.66 (d, 1H, J=13.2 Hz), 3.69 (s, 3H), 3.63 (s, 3H), 3.15-3.07 (m, 1H), 3.01-2.93 (m, 1H), 2.73-2.61 (m, 1H), 2.07-1.74 (m, 3H), 1.78-1.74 (m, 1H). LC-MS: 591 [M+H]+, tR=1.56 min. HPLC: 97.80% at 214 nm, 97.26% at 254 nm, tR=5.91 min

1. customthe solvent was removed in vacuo, methanol (20 mL)
2. additionwere added
3. filtrationfiltrated
4. customThe filtrate was collected
5. concentrationconcentrated
6. custompurified by a silica column chromatography (silica gel 200-300 mesh, eluting with dichloromethane:methanol=40:1)