反应详情

To a solution of N-methyl-N′-(2-nitro-phenyl)-pyrimidine-4,6-diamine (150 g, 0.61 mmol) in THF (15 mL) was added NaH (60%, 60 g, 1.5 mmol) at 0° C., and the mixture was stirred for 30 minutes at room temperature. A solution of 2,4-dichloro-3-isocyanato-1,5-dimethoxy-benzene (180 g, 0.73 mmol) was added dropwise at room temperature. The resulting mixture was stirred for 2 hours. Water (2 mL) was added to quench the reaction. The mixture was concentrated, and the residue was purified by flash chromatography on silica eluting with DCM:EtOAc=6:1-1:1 to obtain the title compound (54 mg, yield: 18%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 3.38 (s, 3H), 3.93 (s, 6H), 6.75 (s, 1H), 6.91 (s, 1H), 7.34 (t, 1H), 7.72 (t, 1H), 7.79 (d, 1H), 8.01 (d, 1H), 8.38 (s, 1H), 9.99 (s, 1H), 11.78 (s, 1H); MS (ESI): 493 [M+H]+.

1. stirringThe resulting mixture was stirred for 2 hours
2. customto quench
3. customthe reaction
4. concentrationThe mixture was concentrated
5. customthe residue was purified by flash chromatography on silica eluting with DCM