Potassium Carbonate → Tert-butyl(1-(4-(6-(2-(dimethylamino)ethyl)-5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamate

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl(1-(4-(5-oxo-3-phenyl-5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)phenyl)cyclobutyl)carbamate (25 mg, 0.05 mmol) in dry DMF (1 mL) was added sodium hydride (5 mg, 0.106 mmol) at 0° C. under nitrogen. After 1 h at 0° C., a solution of 2-chloro-N,N-dimethylethanamine hydrochloride (9 mg, 0.064 mmol) and potassium carbonate (9 mg, 0.064) in 1 mL of DMF was added and the resulting mixture was stirred for one hour at 40° C. The reaction mixture was cooled to 0° C. and a saturated solution of NH4Cl was added while stirring, keeping the temperature below 10° C. The resulting mixture was extracted with dichloromethane (3×) using a phase separator (Isolute® SPE). The combined organic phases were concentrated to dryness under reduced pressure. The resulting residue was purified by PREP HPLC (method G) to give the desired product as a white solid (5 mg, 17% yield). 1H NMR (500 MHz, CDCl3): 8.35 (1H, s), 7.34 (2H, d), 7.29 (2H, d), 7.23-7.25 (3H, m), 7.17-7.20 (2H, m), 5.01 (1H, s), 3.77 (4H, m), 3.28 (2H, t), 2.63 (2H, t), 2.47 (2H+1H, m), 2.35 (6H, s), 2.24-2.32 (2H, m), 1.98-2.12 (1H, m), 1.67-1.89 (9H, br s).

Provenance & Evidence