反应详情

温度

100 °C

2,4-Dichloro-5-fluoropyrimidine (4.7 g, 28.1 mmol) was dissolved in a mixture of MeOH (150 ml) and H2O (15 ml). 3-nitroaniline (15.5 g, 112 mmol) was added and the mixture was refluxed for 20 hours (100° C. oil-bath temperature). The mixture was cooled to 22° C. and filtered. The residue was washed carefully with 200 ml MeOH—H2O (1:1; v/v) and dried under vacuum to give 7.89 g (76%) of N2,N4-bis(3-nitrophenyl)-5-fluoro-2,4-pyrimidinediamine as yellow crystals. 1H NMR (DMSO-d6+D2O): δ 8.63 (m, 2H), 8.21 (m, 1H), 8.08 (d, 1H, J=8.41 Hz), 7.88 (d, 1H, J=8.4 Hz), 7.79 (d, 1H, J=8.4 Hz), 7.70 (d, 1H, J=8.4 Hz), 7.57 (d, 1H, J=8.4 Hz), 7.45 (t, 1H, J=8.4 Hz); LCMS: purity: 100%; MS (m/e): 371.30 (M+, 100).

1. temperatureThe mixture was cooled to 22° C.
2. filtrationfiltered
3. washThe residue was washed carefully with 200 ml MeOH—H2O (1:1; v/v)
4. customdried under vacuum