Triethylamine → HCID 57951070, compound

Participants

Reaction Steps

To a stirred mixture of 5-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)pyrazine-2-carboxylic acid hydrochloric acid salt (0.10 g, 0.25 mmol) in anhydrous N,N-dimethylformamide (3 mL) was added triethylamine (0.56 g, 0.55 mmol), 1-hydroxybenzotriazole hydrate (0.04 g, 0.3 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.06 g, 0.3 mmol), and tert-butyl 4-aminopiperidine-1-carboxylate (0.06 g, 0.3 mmol). The mixture was stirred at room temperature overnight and then concentrated under reduced pressure. The residue obtained was purified by flash chromatography (silica gel, ethyl acetate/hexanes=1/1) to afford tert-butyl 4-(5-(1-(4-(trifluoromethyl)phenyl)piperidin-4-yloxy)pyrazine-2-carboxamido)piperidine-1-carboxylate (compound 19) as a white solid (0.06 g, 44%). 1H-NMR (CDCl3, 300 MHz): δ 8.89 (m, 1H), 8.06 (m, 1H), 7.50 (m, 3H), 6.96 (m, 2H), 5.33 (m, 1H), 4.10 (m, 3H), 3.64 (m, 2H), 3.25 (m, 2H), 2.95 (m, 2H), 2.15 (m, 2H), 1.97 (m, 4H), 1.56 (m, 2H), 1.47 (s, 9H) ppm; MS (ESI): 550.7 (M+1).

Provenance & Evidence