反应详情

N-[2-Methoxy-4-(8-methyl-2,8-diazaspiro[3.4]octan-2-yl)-5-nitrophenyl]-4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-amine (Intermediate 142, 320 mg, 0.65 mmol), iron (219 mg, 3.91 mmol) and NH4Cl (26.2 mg, 0.49 mmol) were heated at reflux in ethanol (18 mL) and water (6 mL) for 4 h. The mixture was then cooled, filtered and concentrated in vacuo. The resulting residue was triturated in 10% CH3OH in CH2Cl2 (15 mL) for 15 minutes and the mixture was then filtered. The residues were re-triturated with 10% CH3OH in CH2Cl2 (15 mL) and the mixture was then filtered. The combined filtrates were washed with brine, dried (Na2SO4) and concentrated in vacuo. Purification by FCC, eluting with 2% 7N methanolic ammonia in CH2Cl2 gave the title compound (251 mg, 84%) as a brown gum which crystallised on standing; 1H NMR: 1.64-1.76 (2H, m), 1.75-1.87 (2H, m), 1.91-2.03 (2H, m), 2.08 (2H, dd), 2.39 (3H, s), 2.63 (2H, t), 3.06 (2H, t), 3.56 (2H, d), 3.72 (3H, s), 3.82 (2H, d), 4.01 (2H, s), 4.10 (2H, t), 6.25 (1H, s), 6.91 (1H, d), 7.21 (1H, s), 7.67 (1H, s), 8.04 (1H, s), 8.23 (1H, d); m/z: ES+ MH+ 461.37.

1. temperatureThe mixture was then cooled
2. filtrationfiltered
3. concentrationconcentrated in vacuo
4. customThe resulting residue was triturated in 10% CH3OH in CH2Cl2 (15 mL) for 15 minutes
5. filtrationthe mixture was then filtered
6. customThe residues were re-triturated with 10% CH3OH in CH2Cl2 (15 mL)
7. filtrationthe mixture was then filtered
8. washThe combined filtrates were washed with brine
9. dry with materialdried (Na2SO4)
10. concentrationconcentrated in vacuo
11. customPurification by FCC
12. washeluting with 2% 7N methanolic ammonia in CH2Cl2