反应详情

温度

60 °C

A solution of (S)-tert-butyl 1-(4-(4-bromo-2-tert-butyl-1H-imidazol-5-yl)pyrimidin-2-ylamino)propan-2-ylcarbamate (2.6 g, 4.4 mmol) in methanol was treated with aqueous 12 N HCl (1.4 mL. 16.8 mmol). The reaction was heated at 60° C. for 1 h, and allowed to cool to rt. The reaction was then concentrated and dried in vacuo to give 1.6 g of a crude residue which was carried forward without further purification. The residue was treated with diisopropylethyl amine (4.6 mL, 26.3 mmol) in dry DCM (18 mL), followed by the dropwise addition of methoxyacetyl chloride (0.44 mL, 4.8 mmol). The reaction mixture was stirred at rt for 1 h, then concentrated, in vacuo, to dryness. The remaining residue was dissolved in EtOAc (40 mL) was washed with water (2×), dried (Na2SO4), and concentrated. The crude residue was purified by flash chromatography (SiO2, 90:10-50:50 hexanes-EtOAc) to afford 1.3 g of (S)—N-(1-(4-(4-bromo-2-tert-butyl-1H-imidazol-5-yl)pyrimidin-2-ylamino)propan-2-yl)-2-methoxyacetamide:

1. temperatureto cool to rt
2. concentrationThe reaction was then concentrated
3. customdried in vacuo
4. customto give 1.6 g of a crude residue which
5. customwas carried forward without further purification
6. concentrationconcentrated, in vacuo, to dryness
7. dissolutionThe remaining residue was dissolved in EtOAc (40 mL)
8. washwas washed with water (2×)
9. dry with materialdried (Na2SO4)
10. concentrationconcentrated
11. customThe crude residue was purified by flash chromatography (SiO2, 90:10-50:50 hexanes-EtOAc)