Formaldehyde → 1-(2-(2-(2-((4-(1-Methylpiperidin-4-yl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)cyclopropanecarboxamide

Participants

Reaction Steps

Formaldehyde (37 wt % in H2O; 8.8 μL, 0.12 mmol) was added to a solution of 1-(2-(2-(2-((4-(piperidin-4-yl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)cyclopropanecarboxamide (2) (20 mg, 39 μmol) in MeOH (5.0 mL) under an atmosphere of nitrogen. The resulting mixture was stirred for 10 minutes at room temperature then sodium triacetoxyborohydride (33 mg, 0.16 mmol) was added in one portion and stirring continued for 2.5 hours. The volatiles were removed in vacuo and the residue was diluted with EtOAc (20 mL) and saturated aqueous NaHCO3 (20 mL). The layers were separated and the aqueous layer was extracted with EtOAc (2×20 mL). The combined organic layers were washed with brine (20 mL), dried over MgSO4 and the volatiles were removed under reduced pressure. The residue was dissolved in DCM (1 mL) to which cyclohexane (5 mL) was added to form a cloudy suspension. The solvent was removed in vacuo and the resulting solid was dried under high vacuum to give the title compound 3 as a white powder (18 mg, 88%); 1H NMR (400 MHz, d6-DMSO) δ 10.15 (s, 1H), 8.67 (s, 1H), 7.66 (d, J=8.5 Hz, 2H), 7.40-7.27 (m, 3H), 7.22 (dd, J=14.4, 8.0 Hz, 3H), 6.99 (s, 1H), 6.01 (s, 1H), 3.21-3.05 (m, 4H), 2.88 (d, J=10.9 Hz, 2H), 2.50-2.30 (m, 1H), 2.21 (s, 3H), 1.99 (s, 2H), 1.79-1.58 (m, 4H), 1.44 (s, 2H), 0.97 (s, 2H). LCMS-A: 5.028 min; m/z 524 [M+H]+.

Provenance & Evidence