反应详情

温度

150 °C

To a mixture of 2-amino-4,6-dimethoxybenzamide (0.377 g, 1.92 mmol) and 4-(4-acetyl-1,4-diazepan-1-yl)benzaldehyde (0.520 g, 2.11 mmol) in DMA (20 mL) was added NaHSO3 (0.240 g, 2.3 mmol) followed by p-TsOH (0.037 g, 0.192 mmol) and the reaction heated at 150° C. for 6 hours. The mixture was cooled to room temperature, diluted with CH2Cl2 (150 mL), washed with brine (2×150 mL), dried over anhydrous MgSO4, filtered, and concentrated. The residue was purified by flash chromatography on silica gel, eluting with 1:1 CH2Cl2/92:7:1 CHCl3/MeOH/concentrated NH4OH to 100% 92:7:1 CHCl3/MeOH/concentrated NH4OH, to afford the title compound (0.333 g, 41%) as a yellow solid. 1H NMR (300 MHz, CDCl3): δ 9.12 (s, 1H), 7.88-7.91 (m, 2H), 6.78-6.82 (m, 3H), 6.42 (d, J=2.2 Hz, 1H), 3.98 (s, 3H), 3.93 (s, 3H), 3.62-3.80 (m, 6H), 3.36-3.48 (m, 2H), 1.98-2.12 (m, 5H). ESI MS m/z 421 [M−H]−.

1. temperatureThe mixture was cooled to room temperature
2. washwashed with brine (2×150 mL)
3. dry with materialdried over anhydrous MgSO4
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue was purified by flash chromatography on silica gel
7. washeluting with 1:1 CH2Cl2/92:7:1 CHCl3/MeOH/concentrated NH4OH to 100% 92:7:1 CHCl3/MeOH/concentrated NH4OH