4-Methylmorpholine → 6-Phenyl-N-[1-(2,2,2-trifluoroethyl)piperidin-4-yl]nicotinamide

Participants

Reaction Steps

To a 250 mL 3-necked flask containing 2-phenyl-5-pyridinecarboxylic acid (2.75 g, 13.8 mmol) in N,N-dimethylacetamide (DMA, 35 mL) was added N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDAC/EDC*HCl, 2.95 g, 15.2 mmol), 1-hydroxybenzotriazole (HOBt. 1.89 g, 13.8 mmol), 1-(2,2,2-trifluoroethyl)piperidin-4-amine (3.36 g, 15.2 mmol) and 4-methylmorpholine (NMM, 3.8 mL, 34.5 mmol). After stirring at room temperature for 1 hour, the reaction was diluted with water (˜200 mL) and the resulting solid collected by filtration. The solid was washed with H2O (3×100 mL), collected and dried in a vacuum oven (45° C.) overnight to give the desired product (4.24 g). LCMS (ES+) 4.30 min (TIC, 75%; 1H NMR purity >95%); 1H NMR (400 MHz, DMSO-d6) □ ppm 1.46-1.65 (m, 2H) 1.77 (d, J=10.80 Hz, 2 H) 2.31-2.54 (m, 4H) 2.90 (d, J=11.53 Hz, 2H) 3.65-3.86 (m, 1H) 7.36-7.56 (m, 3H) 8.01 (d, J=8.24 Hz, 1H) 8.09 (d, J=6.95 Hz, 2H) 8.22 (d, J=8.42 Hz, 1H) 8.38 (d, J=7.32 Hz, 1H) 9.02 (s, 1 H); MS(ES+) 364 (M+1); HRMS (TOF, ES+) calculated for C19H20F3N3O+H+: 364.1637; observed 364.1611.

Provenance & Evidence