Hydrochloric Acid → HCID 86718582, compound

Participants

Reaction Steps

Sodium triacetoxyborohydride (0.30 g, 1.4 mmol) was added to a solution of 5-(tert-butyl)-2-hydroxy-3-(6-(trifluoromethyl)pyridin-3-yl)benzaldehyde (0.35 g, 1.1 mmol) and piperidine (0.13 mL, 1.3 mmol) in tetrahydrofuran (10 mL). The reaction mixture was stirred at room temperature under nitrogen for 16 hours. Additional piperidine (013 mL, 1.3 mmol) and sodium triacetoxyborohydride (0.30 g, 1.4 mmol) were added and the reaction was stirred under nitrogen for 4 hours. The reaction was partitioned between ethyl acetate (25 mL) and saturated aqueous sodium bicarbonate solution (25 mL). The organic phase was dried with sodium sulfate, filtered and concentrated under reduced pressure to give a yellow syrup. The product was purified using flash chromatography on silica eluting with a solvent gradient of 0 to 100% ethyl acetate in hexanes to give a yellow syrup which was dissolved in 1.25 M hydrochloric acid in ethanol (10 mL, 12.5 mmol). The mixture stood for 20 minutes and was concentrated under reduced pressure to give a white solid which was triturated with diethyl ether (10 mL) and the solid was filtered off to afford 4-(tert-butyl)-2-(piperidin-1-ylmethyl)-6-(6-(trifluoromethyl)pyridin-3-yl)phenol hydrochloride (0.29 g, 62% yield) as a white solid.

Provenance & Evidence