Sulfuric Acid → HCID 59400175, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)—N—((S)-1-(4-fluorobenzyl)-1,2,3,4-tetrahydroquinolin-3-yl)-2-hydroxy-2-phenylacetamide (350 mg, 0.90 mmol) in absolute ethanol (20 mL) was added concentrated sulfuric acid (2 mL). The reaction mixture was stirred at 85° C. for 24 hours. The mixture was diluted with EtOAc (100 mL), 6 M NaOH aqueous solution (20 mL) and water (50 mL). The phases were separated and the aqueous phase was extracted with EtOAc (100 mL). The combined organic phases were washed with water (50 mL) and brine (50 mL), dried over anhydrous sodium sulfate and evaporated to dryness. The crude product was purified by flash chromatography using a gradient (0-10% MeOH in EtOAc). The desired product (S)-1-(4-fluorobenzyl)-1,2,3,4-tetrahydroquinolin-3-amine was obtained as yellow oil (169 mg, 73% yield). 1H NMR (DMSO-d6) 400 MHz δ 7.32-7.25 (m, 2H), 7.18-7.10 (m, 2H), 6.91-6.85 (m, 2H), 6.50-6.42 (m, 2H), 4.49 (d, J=16.8 Hz, 1H for AB system), 4.42 (d, J=16.8 Hz, 1H for AB system), 3.36-3.28 (m, 2H), 3.18-3.10 (m, 1H), 3.01 (dd, J=11.0, 8.6 Hz, 1H), 2.84 (dd, J=15.7, 2.7 Hz, 1H), 1.70 (br. s, 2H). LCMS m/e 258 (M+H).

Provenance & Evidence