4-Ethoxyaniline → N4-(3,4-dimethoxyphenyl)-N2-(4-ethoxyphenyl)-5-fluoro-2,4-pyrimidinediamine

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In like manner to the preparation of N4-(3,4-ethylenedioxyphenyl)-5-fluoro-N2-(3-hydroxyphenyl)-2,4-pyrimidinediamine, the reaction of 2-chloro-N4-(3,4-dimethoxyphenyl)-5-fluoro-4-pyrimidineamine with 4-ethoxyaniline gave N4-(3,4-dimethoxyphenyl)-N2-(4-ethoxyphenyl)-5-fluoro-2,4-pyrimidinediamine. 1H NMR (CDCl3): δ 7.90 (bs, 1H), 7.37 (dd, 2H, J=2.4 and 6.3 Hz), 7.21 (d, 1H, J=2.4 Hz), 7.03 (dd, 1H, J=2.4 and 8.1 Hz), 6.86-6.80 (m, 4H), 6.65 (bs, 1H), 4.00 (q, 2H, J=7.2 Hz), 3.89 (s, 3H), 3.75 (s, 3H), 1.39 (t, 3H, J=6.9 Hz); 19F NMR (CDCl3): −47501; LCMS: ret. time: 22.69 min.; purity: 98%; MS (m/e): 385 (MH+).

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