HCID 67513822, compound → HCID 67506440, compound

Participants

Reaction Steps

A solution of benzyl 2-(3,4-difluorophenyl)-4-oxo-3,4-dihydropyridine-1(2H)-carboxylate (6.70 g, 19.50 mmol) (reagent preparation 20) in methanol (100 mL) was hydrogenated with catalytic 10% palladium on carbon in a Parr shaker at 35 psi. The catalyst was filtered off and the filtrate was concentrated then dried to give (±)-(2R,4S)-2-(3,4-difluorophenyl)piperidin-4-ol (4.2 g, quantitative). 1H NMR (400 MHz, d6-DMSO): 7.33 (m, 1H), 7.28 (m, 1H), 7.02 (m, 1H), 5.00 (t, 1H), 4.49 (d, 1H), 3.91 (m, 1H), 3.77 (m, 1H), 3.21 (m, 1H), 2.11 (2t, 1H), 1.95 (2q, 1H), 1.70 (m, 1H), 1.50 (m, 1H). MS (EI) for C11H13F2NO: 214 (MH+).

Provenance & Evidence