ethyl 2-piperidin-4-ylpropanoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Dissolve 2-[1-(phenylmethyl)-4-piperidinylidene]propanoic acid, ethyl ester (1.5 g, 5.5 mmol) in acetic acid (50 mL).and place in a Paar hydrogenation flask. Add 10% palladium(C) (500 mg). Charge the vessel to 50 psi and shake for 18 hours. Filter the solution through Celite and remove the solvent in vacuo to give 2-(4-piperidyl)propanoic acid, ethyl ester. Charge the vessel to 50 psi Filter the solution through Celite remove the solvent in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Dissolve 2-[1-(phenylmethyl)-4-piperidinylidene]propanoic acid, ethyl ester (1.5 g, 5.5 mmol) in acetic acid (50 mL).and place in a Paar hydrogenation flask. Add 10% palladium(C) (500 mg). Charge the vessel to 50 psi and shake for 18 hours. Filter the solution through Celite and remove the solvent in vacuo to give 2-(4-piperidyl)propanoic acid, ethyl ester. Charge the vessel to 50 psi Filter the solution through Celite remove the solvent in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Dissolve 2-[1-(phenylmethyl)-4-piperidinylidene]propanoic acid, ethyl ester (1.5 g, 5.5 mmol) in acetic acid (50 mL).and place in a Paar hydrogenation flask. Add 10% palladium(C) (500 mg). Charge the vessel to 50 psi and shake for 18 hours. Filter the solution through Celite and remove the solvent in vacuo to give 2-(4-piperidyl)propanoic acid, ethyl ester. Charge the vessel to 50 psi Filter the solution through Celite remove the solvent in vacuo

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A sample of tert-butyl 4-(1-ethoxy-1-oxopropan-2-yl)piperidine-1-carboxylate (1.4 g, 4.91 mmol) was dissolved in 4 M hydrogen chloride/dioxane (5 mL, 165 mmol) and stirred at RT for 2 h. At the conclusion of this period, the mixture was concentrated on a rotary evaporator and the resultant residue was treated with saturated NaHCO3 and then 1 M NaOH to bring the pH to 9. The mixture was extracted with EtOAc. The extract was washed with brine, dried (MgSO4) and concentrated to give ethyl 2-(piperidin-4-yl)propanoate (0.85 g, 93%). 1H-NMR (400 MHz, CDCl3) δ ppm 4.05-4.13 (2 H, m), 2.99-3.08 (2 H, m), 2.54 (2 H, td, J=12.09, 2.52 Hz), 2.16-2.25 (1 H, m), 1.75 (1 H, s), 1.57-1.66 (2 H, m), 1.52 (1 H, dt, J=12.90, 2.86 Hz), 1.09-1.22 (1 H, m), 1.21 (3 H, t, J=7.18 Hz), 1.07 (3 H, d, J=7.05 Hz). At the conclusion of this period, the mixture was concentrated on a rotary evaporator the resultant residue was treated with saturated NaHCO3 The mixture was extracted with EtOAc The extract was washed with brine dried (MgSO4) concentrated