N,N-diethylpiperidin-4-amine;dihydrochloride

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-(diethylamino)piperidine dihydrochloride (3.0 g, 0.019 mmol) in water (20 mL), 2M sodium hydroxide solution (5.0 mL) was added at ambient temperature. The mixture was stirred for 30 min. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material, then the residue was removed by filtration. The filtrate was concentrated and dried to afford 4-(diethylamino)piperidine (1.7 g, y. 77%) as solid. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material the residue was removed by filtration The filtrate was concentrated dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Cooled with ice bath, 4M hydrochloric acid in dioxane (25 mL) was added to tert-butyl 4-(N,N-diethylamino)piperidine-1-carboxylate (6.1 g, 0.024 mol) and the mixture was stirred at ambient temperature for 2 h. The solvent was removed under reduced pressure, and the residue was suspended in diethyl ether, then the precipitate was collected by filtration, washed with diethyl ether and then dried to afford 4-(diethylamino)piperidine dihydrochloride as solid (3.9 g, y. 99%). Cooled with ice bath The solvent was removed under reduced pressure the precipitate was collected by filtration washed with diethyl ether dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-(diethylamino)piperidine dihydrochloride (3.0 g, 0.019 mmol) in water (20 mL), 2M sodium hydroxide solution (5.0 mL) was added at ambient temperature. The mixture was stirred for 30 min. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material, then the residue was removed by filtration. The filtrate was concentrated and dried to afford 4-(diethylamino)piperidine (1.7 g, y. 77%) as solid. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material the residue was removed by filtration The filtrate was concentrated dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Cooled with ice bath, 4M hydrochloric acid in dioxane (25 mL) was added to tert-butyl 4-(N,N-diethylamino)piperidine-1-carboxylate (6.1 g, 0.024 mol) and the mixture was stirred at ambient temperature for 2 h. The solvent was removed under reduced pressure, and the residue was suspended in diethyl ether, then the precipitate was collected by filtration, washed with diethyl ether and then dried to afford 4-(diethylamino)piperidine dihydrochloride as solid (3.9 g, y. 99%). Cooled with ice bath The solvent was removed under reduced pressure the precipitate was collected by filtration washed with diethyl ether dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Cooled with ice bath, 4M hydrochloric acid in dioxane (25 mL) was added to tert-butyl 4-(N,N-diethylamino)piperidine-1-carboxylate (6.1 g, 0.024 mol) and the mixture was stirred at ambient temperature for 2 h. The solvent was removed under reduced pressure, and the residue was suspended in diethyl ether, then the precipitate was collected by filtration, washed with diethyl ether and then dried to afford 4-(diethylamino)piperidine dihydrochloride as solid (3.9 g, y. 99%). Cooled with ice bath The solvent was removed under reduced pressure the precipitate was collected by filtration washed with diethyl ether dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 4-(diethylamino)piperidine dihydrochloride (3.0 g, 0.019 mmol) in water (20 mL), 2M sodium hydroxide solution (5.0 mL) was added at ambient temperature. The mixture was stirred for 30 min. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material, then the residue was removed by filtration. The filtrate was concentrated and dried to afford 4-(diethylamino)piperidine (1.7 g, y. 77%) as solid. The solvent was removed under reduced pressure, and methanol (10 mL) was added to the crude material the residue was removed by filtration The filtrate was concentrated dried

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Cooled with ice bath, 4M hydrochloric acid in dioxane (25 mL) was added to tert-butyl 4-(N,N-diethylamino)piperidine-1-carboxylate (6.1 g, 0.024 mol) and the mixture was stirred at ambient temperature for 2 h. The solvent was removed under reduced pressure, and the residue was suspended in diethyl ether, then the precipitate was collected by filtration, washed with diethyl ether and then dried to afford 4-(diethylamino)piperidine dihydrochloride as solid (3.9 g, y. 99%). Cooled with ice bath The solvent was removed under reduced pressure the precipitate was collected by filtration washed with diethyl ether dried