4-(4-Methylpiperazin-1-yl)aniline → 6-(4-Bromo-2-chlorophenyl)-8-ethyl-2-(4-(4-methylpiperazin-1-yl)phenylamino)pyrido[2,3-d]pyrimidin-7(8H)-one

Participants

Reaction Steps

6-(4-Bromo-2-chlorophenyl)-8-ethyl-2-(methylsulfinyl)pyrido[2,3-d]pyrimidin-7(8H)-one (11, 0.60 g, 1.41 mmol) and 4-(4-methylpiperazino)aniline (0.27 g, 1.41 mmol) were stirred at 150° C. for 4 h. The cooled reaction mixture was taken up in dichloromethane (50 mL) and washed with 10% NaOH (1×25 mL) then with water (1×20 mL). The organic layer was dried over sodium sulfate, filtered and evaporated. The residue was purified by column chromatography using chloroform:methanol (100:3) as eluent to give the title compound as a yellow solid (0.32 g, 0.58 mmol, 41%). ESMS m/z 553 (M+H)+; 1H NMR (400 MHz, CDCl3) δ ppm 8.53 (s, 1H), 7.65 (d, J=1.8 Hz, 1H), 7.52-7.59 (m, 3H), 7.45 (dd, J=8.2, 1.9 Hz, 1H), 7.28 (d, J=8.2 Hz, 1H), 6.97 (d, J=8.8 Hz, 2H), 4.48 (q, J=7.0 Hz, 2H), 3.17-3.26 (m, 4H), 2.55-2.70 (m, 4H), 2.37 (s, 3H), 1.37 (t, J=7.0 Hz, 3H).

Provenance & Evidence