反应详情

温度

50 °C

To a solution of {trans-4-[2-(chloromethyl)-1H-imidazo[4,5-d]thieno[3,2-b]pyridin-1-yl]cyclohexyl}acetonitrile (from example 17, 22.2 mg, 0.0644 mmol) dissolved in N,N-dimethylformamide (0.2 mL) was added tert-butyl (methylsulfonyl)carbamate (19 mg, 0.096 mmol) and potassium carbonate (18 mg, 0.13 mmol). The reaction was stirred at 50° C. overnight. The mixture was diluted with water, extracted with EtOAc. The combined organic layers were dried over MgSO4 and concentrated to give tert-butyl ({1-[trans-4-(cyanomethyl)cyclohexyl]-1H-imidazo[4,5-d]thieno[3,2-b]pyridin-2-yl}methyl)(methylsulfonyl)carbamate. LCMS calculated for C23H30N5O4S2 (M+H)+: m/z=504.2. Found: 504.1. This crude intermediate was treated with trifluoroacetic acid (0.1 mL, 1 mmol) in methylene chloride (0.1 mL) at room temperature for 30 min, and then the solvent was removed in vacuo. The residue was then dissolved in MeOH and purified on prep-LCMS (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 (9.5 mg, 36%). LCMS calculated for C18H22N5O2S2 (M+H)+: m/z=404.1. Found: 404.0.

1. extractionextracted with EtOAc
2. dry with materialThe combined organic layers were dried over MgSO4
3. concentrationconcentrated