Pyridine → HCID 86613789, compound

Participants

Reaction Steps

Add acetic anhydride (0.023 mL, 1.205 mmol) to a solution of (+/−)-cis-4-(3,5-bis-trifluoromethyl-benzylamino)-2-ethyl-6-methoxy-3,4-dihydro-2H-[1,5]naphthyridine-1-carboxylic acid isopropyl ester (125 mg, 0.241 mmol) and pyridine (0.097 mL, 1.205 mmol) in dichloromethane (2 mL), and stir at room temperature for 14 h. Remove the solvent under reduced pressure and purify the residue by flash chromatography, eluting with hexanes/ethyl acetate, to afford the title compound (105 mg, 78%). 1H NMR (CDCl3, 300 MHz): δ 0.66-0.72 (m, 3H), 1.20-1.29 (m, 7H), 1.33-1.69 (m, 3H), 2.01-2.21 (m, 3H), 2.26-2.33 (m, 1H), 3.82, 3.86 (s, 3H), 4.22-4.28 (m, 1H), 4.81-5.01 (m, 2H), 6.59, 6.65 (d, J=8.7 Hz, 1H), 7.61-7.73 (m, 4H). MS (ES+): 562 (M+H).

Provenance & Evidence