反应详情

温度

65 °C

The resulting 2-(piperazin-1-ylmethyl)thiazole (supposedly 0.580 g, 3.18 mmol, 1 eq) was suspended in iPrOH (3.1 mL) and DIPEA (2.2 mL). To this solution, 5-bromo-4-chloro-3-nitropyridin-2-amine (0.800 g, 3.18 mmol, 1 eq) was added and the reaction mixture was heated and stirred for 17 h at 65° C. The mixture was filtered, washed with iPrOH (3×3 mL), Et2O (2×3 mL) and dried to give the title compound as a bright yellow powder (0.750 g, 59%); 1H-NMR (500 MHz, DMSO-d6): δ 2.65 (br s, 4H, piperazine N(CH2)2), 3.09 (m, 4H, piperazine N(CH2)2), 3.90 (s, 2H, NCH2), 6.98 (s, 2H, NH2), 7.66 (d, J=3.0 Hz, 1H, thiazole 5-H), 7.72 (d, J=3.0 Hz, 1H, thiazole 4-H), 8.16 (s, 1H, pyridine 6-H); LC (Method B)-MS (ESI, m/z): Rt=2.90 mins-399/401 [(M+H+), Br isotopic pattern, 100%].

1. temperaturethe reaction mixture was heated
2. filtrationThe mixture was filtered
3. washwashed with iPrOH (3×3 mL), Et2O (2×3 mL)
4. customdried