Formaldehyde → 2-(2-(2-(2-((6-(1-Methylpiperidin-4-yl)pyridin-3-yl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetamide

Participants

Reaction Steps

Formaldehyde (37 wt. % in H2O; 0.012 mL, 0.17 mmol) was added to a solution of 2-(2-(2-(2-((6-(piperidin-4-yl)pyridin-3-yl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetamide (13) (27 mg, 0.056 mmol) in MeOH (2 mL) under an atmosphere of nitrogen. The resulting mixture was stirred for 15 minutes at room temperature before sodium triacetoxyborohydride (47 mg, 0.22 mmol) was added in one portion and stirring was continued at room temperature for 18 hours. The volatiles were removed in vacuo and the residue was partitioned between EtOAc (50 mL) and saturated aqueous NaHCO3 (50 mL). The layers were separated and the aqueous layer was extracted with EtOAc (2×25 mL). The combined organic layers were washed with water (25 mL), brine (25 mL) then dried over Na2SO4. The solvent was removed under reduced pressure to give the title compound 14 as a white solid (25 mg, 90%); 1H NMR (400 MHz, d4-MeOH) δ 8.77 (d, J=2.4 Hz, 1H), 8.60 (s, 1H), 8.18 (dd, J=8.6, 2.6 Hz, 1H), 7.31 (d, J=8.6 Hz, 1H), 7.26 (d, J=6.3 Hz, 1H), 7.21-7.15 (m, 3H), 3.67 (s, 2H), 3.20-3.14 (m, 2H), 3.14-3.08 (m, 2H), 3.04 (d, J=11.7 Hz, 2H), 2.71 (tt, J=11.9, 3.9 Hz, 1H), 2.35 (s, 3H), 2.21 (td, J=12.0, 2.5 Hz, 2H), 1.96 (d, J=11.0 Hz, 2H), 1.92-1.80 (m, 2H). LCMS-A: rt 4.635 min; m/z 499 [M+H]+.

Provenance & Evidence