反应详情

A mixture of N-[4-(3-dimethylaminoazetidin-1-yl)-2-methoxy-5-nitrophenyl]-5-methyl-4-(1-methylindol-3-yl)pyrimidin-2-amine (Intermediate 115, 210 mg, 0.43 mmol), iron (144 mg, 2.58 mmol) and NH4Cl (16.13 mg, 0.30 mmol) in ethanol (6 mL) and water (2 mL) were heated at reflux for 2 h. The crude mixture was purified by ion exchange chromatography, using an SCX column and eluting with 7M methanolic ammonia. Appropriate fractions were combined and concentrated in vacuo onto silica. Further purification by FCC, eluting with 0-5% 7N methanolic ammonia in CH2Cl2 gave a brown foam after concentration of appropriate fractions in vacuo. Further purification by ion exchange chromatography, using an SCX column and eluting with 7M methanolic ammonia provided material that was concentrated in vacuo onto silica. Further purification by FCC, eluting with 0-4% CH3OH in CH2Cl2 gave the title compound (135 mg, 69%) as a brown foam; 1H NMR: 2.11 (6H, s), 2.35 (3H, s), 3.04 (1H, p), 3.44 (2H, t), 3.89 (3H, s), 3.92 (2H, s), 3.9-3.97 (2H, m), 6.28 (1H, s), 7.12 (1H, dd), 7.2-7.26 (1H, m), 7.28 (1H, s), 7.48 (1H, d), 7.55 (1H, s), 8.00 (1H, s), 8.15 (1H, s), 8.43 (1H, d); m/z: ES+ MH+ 458.31.

1. temperaturewere heated
2. temperatureat reflux for 2 h
3. customThe crude mixture was purified by ion exchange chromatography
4. washeluting with 7M methanolic ammonia
5. concentrationconcentrated in vacuo onto silica
6. customFurther purification by FCC
7. washeluting with 0-5% 7N methanolic ammonia in CH2Cl2
8. customgave a brown foam after concentration of appropriate fractions in vacuo
9. customFurther purification by ion exchange chromatography
10. washeluting with 7M methanolic ammonia provided material that
11. concentrationwas concentrated in vacuo onto silica
12. customFurther purification by FCC
13. washeluting with 0-4% CH3OH in CH2Cl2