tert-Butyl 4-formylpiperidine-1-carboxylate → HCID 68385337, compound

Participants

Reaction Steps

To a solution of trans-2-(3-fluoro-2-methoxyphenyl)cyclopropanamine hydrochloride (Biochemistry 2010, 49(30), 6494) (500 mg, 2.76 mmol) in a mixture of 1,2-dichloroethane (20 mL) and MeOH (5 mL) was added tert-butyl 4-formylpiperidine-1-carboxylate (588 mg, 2.76 mmol) and stirred for 3 min then Na(OAc)3BH (1.75 g, 8.28 mmol) was added and stirred for 10 min at RT. The reaction mixture was diluted with DCM (100 mL) and washed with water (2×50 mL), and brine (20 mL). The organic layer was dried over anhydrous sodium sulphate and concentrated. The crude was purified by column chromatography using silica gel, eluting with 2% MeOH in DCM to afford tert-butyl 4-(((trans)-2-(3-fluoro-2-methoxyphenyl)cyclopropylamino)methyl)piperidine-1-carboxylate (250 mg, 25% yield) as yellow liquid. LCMS (ES) m/e 379.45 (M+H)+. To a solution of tert-butyl 4-(((trans)-2-(3-fluoro-2-methoxyphenyl)cyclopropylamino)methyl)piperidine-1-carboxylate (200 mg, 0.529 mmol) in 1,4-dioxane (5 mL) was added 4N HCl in 1,4-dioxane (30 mL) and stirred for 8 h at RT. The reaction mixture was concentrated and the residue was triturated with diethyl ether (50 mL), EtOAc (20 mL) and dried under high vacuum to afford (trans)-2-(3-fluoro-2-methoxyphenyl)-N-(piperidin-4-ylmethyl)cyclopropanamine hydrochloride (130 mg, 88%) as off white solid. LCMS (ES) m/e 279.45 (M+H)+, 95.34%, (DMSO-d6) δ ppm 9.53 (bs, 2H), 8.88 (bs, 1H), 8.69 (bs, 1H), 7.15 (t, J=8.4 Hz, 1H), 7.09-7.07 (m, 1H), 6.78 (d, J=8.0 Hz, 1H), 3.90 (s, 3H), 3.29 (d, 2H), 3.0 (bs, 3H), 2.79-2.89 (m, 3H), 2.05 (bs, 1H), 1.96 (d, J=13.6 Hz, 2H), 1.63 (m, 1H), 1.38-1.47 (m, 2H), 1.24-1.29 (m, 1H).

Provenance & Evidence