Formaldehyde → 2-(2-(2-(2-((4-((4-Methylpiperazin-1-yl)methyl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetamide

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Reaction Steps

2-(2-(2-(2-((4-(Piperazin-1-ylmethyl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetamide (25) (11 mg, 0.022 mmol) was dissolved in methanol (1 mL). 37% Formaldehyde solution (7 μL) was added followed by sodium triacetoxyborohydride (24 mg, 0.11 mmol). The mixture was stirred vigorously at room temperature for two hours then concentrated. The residue was suspended in 10% sodium hydroxide (1 mL) and brine (2 mL) then extracted with ethyl acetate (5×2 mL). The combined ethyl acetate phases were washed with brine, dried over sodium sulfate, evaporated and the residue evaporated from DCM to give the title compound (36) (10.3 mg, 94% yield) as an off-white solid; 1H NMR (400 MHz, d4-MeOD) δ 8.46 (d, J=0.5 Hz, 1H), 7.60-7.54 (m, 2H), 7.20 (d, J=8.6 Hz, 2H), 7.18-7.13 (m, 1H), 7.13-7.07 (m, 3H), 3.57 (s, 2H), 3.46 (s, 2H), 3.06 (qd, J=6.8, 3.1 Hz, 2H), 3.01-2.94 (m, 2H), 2.54 (s, 8H), 2.29 (s, 3H). LCMS Method C: 4.70 min; m/z 513.2 [M+H+]+; m/z 511.0 [M−H]−.

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