反应详情

A mixture of (2R)-2-hydroxypropanamide (0.630 g, 7.07 mmol) and triethyloxonium tetrafluoroborate (1.26 g, 6.66 mmol) in tetrahydrofuran (9.7 mL) was stirred at room temperature for 2 h. The solvent was removed, and the residue dissolved in ethanol (4.1 mL) and added to a suspension of {trans-4-[(6-aminothieno[3,2-b]pyridin-7-yl)amino]cyclohexyl}acetonitrile (0.63 g, 2.2 mmol) in ethanol (15 mL). The reaction was stirred at 80° C. for 2 h. The solvent was removed and the residue was partitioned between EtOAc and sat. NaHCO3 solution. The organic phase was washed with brine, dried over MgSO4, and concentrated. The residue was purified on silica gel (eluting with 0 to 10% MeOH in dichloromethane), then further purified on RP-HPLC (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 30 mL/min) to give the desired product (0.55 g, 73%). LCMS calculated for C18H21N4OS (M+H)+: m/z=341.1. Found: 341.1.

1. customThe solvent was removed
2. dissolutionthe residue dissolved in ethanol (4.1 mL)
3. stirringThe reaction was stirred at 80° C. for 2 h
4. customThe solvent was removed
5. customthe residue was partitioned between EtOAc and sat. NaHCO3 solution
6. washThe organic phase was washed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated
9. customThe residue was purified on silica gel (eluting with 0 to 10% MeOH in dichloromethane)
10. customfurther purified on RP-HPLC (XBridge C18 column
11. washeluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 30 mL/min)