Hydrogen Bromide → HCID 66732460, compound

Participants

Reaction Steps

Trans-methyl 2-(3-methyl-4-(trifluoromethyl)phenyl)-4-(3-oxo-2,3-dihydroisoxazol-5-yl)piperidine-1-carboxylate (0.139 g, 0.36 mmol) was dissolved in HBr (33% in acetic acid, 5.60 g, 22.84 mmol) and the mixture was stirred at room temperature overnight. The solvent was evaporated and the residue purified by preparative HPLC (Instrument: FractionLynx II, Mobilphase: gradient 5-95% MeCN in 0.2% NH3, pH 10, Column: Xbridge Prep C18 5 μm OBD 19*150 mm) to yield 5-(trans-2-(3-methyl-4-(trifluoromethyl)phenyl)piperidin-4-yl)isoxazol-3(2H)-one (0.075 g, 64%). 1H NMR (600 MHz, dmso) δ 1.76-1.85 (m, 2H), 1.85-1.93 (m, 1H), 1.99-2.07 (m, 1H), 2.40 (d, 2H), 2.67-2.75 (m, 1H), 2.80-2.89 (m, 1H), 3.10-3.17 (m, 1H), 3.68-3.78 (m, 1H), 5.96 (s, 1H), 7.36 (d, 1H), 7.43 (s, 1H), 7.57 (d, 1H). HRMS Calcd for [C16H17F3N2O2+H]+: 327.1320. Found: 327.1298.

Provenance & Evidence