反应详情

To 2-amino-4-chloro-6-(2,3-difluorophenylamino)-[1,3,5]triazine (Intermediate 55, 1.0 g, 3.89 mmol) was added DABCO (540 mg, 4.67 mmol), tetra n-butylammonium cyanide (1.15 g, 4.28 mmol) and anhydrous acetonitrile (15 mL). The reaction mixture was stirred at 50 C for 1 h, diluted with 50 mL ethyl acetate, extracted with 1M aq. citric acid (2×50 mL), water (2×50 mL), saturated brine (50 mL) and dried further over anhydrous sodium sulfate. Evaporation of the solvent gave a red gum which was purified by column chromatography on silica eluting with DCM-2% ethyl acetate to give the desired compound (429 mg, 69%). Method B HPLC-MS: MH+ requires m/z=249. Found: m/z=249, Rt=1.64 min (91%).

1. extractionextracted with 1M aq. citric acid (2×50 mL), water (2×50 mL), saturated brine (50 mL)
2. dry with materialdried further over anhydrous sodium sulfate
3. customEvaporation of the solvent
4. customgave a red gum which
5. customwas purified by column chromatography on silica eluting with DCM-2% ethyl acetate