反应详情

温度

25 °C

To a solution of 8 g of 4-{1-[2-(4-Acetyl-3,5-dimethyl-piperazin-1-yl)-pyridin-4-yl]-1H-[1,2,4]triazol-3-ylamino}-benzoic acid (18.3 mMol, 1.00 equiv) in 150 mL of NMP was added 9 mL of Hunig's base followed by 6 g of DPPA (21.8 mMol, 1.19 equiv). The reaction was stirred for 30 min at 25° C. To the reaction mixture was then added 200 mL of TFA and the resulting solution was warmed to 90° C. for 12 hr. After cooling to 25° C., the reaction was quenched with 200 mL of concentrated ammonium hydroxide and concentrated. The resulting oil was triturated with CH2Cl2 and the solid was isolated by filtration. The solid was then dissolved in MeOH (100 mL) and concentrated to 50 mL. The resulting precipitate was isolated and treated with 50 mL of 1 N HCl and concentrated via rotary evaporation. The oil was triturated with ethanol and the resulting solid was removed by filtration. The ethanol solution was concentrated to give 2.5 g of 1-(4-{4-[3-(4-Amino-phenylamino)-[1,2,4]triazol-1-yl]-pyridin-2-yl}-2,6-dimethyl-piperazin-1-yl)-ethanone (6.15 mMol, 33.6% yield) as the HCl salt. 1H NMR (500 MHz, CDCl3) ∂ 8.39 (1H, s), 8.10 (1H, d), 7.22 (2H, d), 7.15 (2H, d), 6.95 (1H, s), 6.92 (2H, m), 6.75 (1H, m), 6.65 (2H, d), 4.15 (2H, m), 3.08 (2H, m), 2.99 (2H, m), 2.10 (3H, s), 1.30 (6H, m) ppm. LC/MS: 0.54 min/407.3 (M+1)

1. temperaturethe resulting solution was warmed to 90° C. for 12 hr
2. temperatureAfter cooling to 25° C.
3. customthe reaction was quenched with 200 mL of concentrated ammonium hydroxide
4. concentrationconcentrated
5. customThe resulting oil was triturated with CH2Cl2
6. customthe solid was isolated by filtration
7. concentrationconcentrated to 50 mL
8. customThe resulting precipitate was isolated
9. concentrationconcentrated via rotary evaporation
10. customThe oil was triturated with ethanol
11. customthe resulting solid was removed by filtration
12. concentrationThe ethanol solution was concentrated