Hydrochloric Acid → HCID 73213949, compound

Participants

Reaction Steps

To a solution of (S)-tert-butyl (1-((9-(difluoromethyl)-4,6-dimethyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (500 mg, 0.480 mmol) in MeOH (10 mL) at 0° C. was added 4N HCl in 1,4-dioxane (20 mL, 80 mmol). The solution was warmed to room temperature and stirred for 2 h. The mixture was then was concentrated under reduced pressure. The residue was taken up in EtOAc and the EtOAc layer was washed with saturated aqueous NaHCO3 then H2O, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep. HPLC to afford (S)-8-((2-amino-4-methylpentyl)oxy)-9-(difluoromethyl)-4,6-dimethylbenzo[c][2,7]naphthyridin-5(6H)-one (60 mg, 0.149 mmol, 31% yield) as pale yellow solid. LC/MS (ESI) m/e 390.2 [(M+H)+, calcd for C21H26F2N3O2, 390.2]; LC/MS retention time (method A): tR=2.09 min; HPLC retention time (method A): tR=10.1 min; HPLC retention time (method B): tR=9.18 min; 1H NMR (400 MHz, METHANOL-d4) δ ppm 8.73 (s, 1H), 8.66 (s, 2H), 7.07-7.41 (m, 2H), 4.66-4.53 (m, 1H), 4.52-4.49 (m, 1H), 3.78-3.89 (m, 4H), 3.22 (s, 3H), 1.74-1.88 (m, 2H), 1.63-1.71 (m, 1H), 1.04 (m, 6H).

Provenance & Evidence