反应详情

温度

70 °C

N-(6-amino-4-n-propylamino-[1,3,5]triazin-2-yl)-N,O-dimethyl-hydroxylamine (XXXIX) (5 g, 23.58 mmol) was dissolved in THF (50 mL). Propionyl chloride (3.25 g, 35.38 mmol) and DIPEA (5.47 g, 42.44 mmol) were added at 0° C. The resultant mixture was stirred at ambient temperature for 10 min, then stirred at 70° C. for 16 h, after which time the solvent was removed under reduced pressure. The residue was dissolved in EtOAc (250 mL), and this extract was washed with water (80 mL) and then with a brine solution (80 mL), and lastly dried over Na2SO4. The solvent was removed under reduced pressure and the crude product was purified by flash column chromatography (pet ether/ethyl acetate=5/1 to 2/1) to yield 930 mg (15%) of the desired product. The isolated free amine (930 mg, 3.47 mmol) was dissolved in H2O (10 mL) and 0.5 M HCl solution in H2O (10.4 mL) and then the solution was lyophilized to yield N-(4-(methoxy(methyl)amino)-6-(n-propylamino)-1,3,5-triazin-2-yl)propionamide (XL) as a colorless oil (1.06 g). LCMS: (ESI) m/z=269 (M+H)+. 1H NMR (500 MHz, DMSO): δ (ppm) 12.23 (s, 1H), 8.25-9.45 (m, 2H), 3.76-3.84 (m, 3H), 3.30-3.44 (m, 5H), 2.55-2.56 (m, 1H), 2.21-2.22 (m, 1H), 1.53-1.58 (m, 2H), 0.88-1.08 (m, 6H).

1. customafter which time the solvent was removed under reduced pressure
2. dissolutionThe residue was dissolved in EtOAc (250 mL)
3. washthis extract was washed with water (80 mL)
4. dry with materialwith a brine solution (80 mL), and lastly dried over Na2SO4
5. customThe solvent was removed under reduced pressure
6. customthe crude product was purified by flash column chromatography (pet ether/ethyl acetate=5/1 to 2/1)