3-aminopiperidin-2-one

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-aminophthalic acid (0.100 g, 0.552 mmol) in DMF (1.1 mL) was added 3-aminopiperidine-2-one (0.063 g, 0.552 mmol) and the reaction was stirred at 90° C. over 18 h. Volatiles were removed in vacuo and the dark-brown crude residue was purified by preparative reverse phase HPLC to give the desired product 28 (0.050 g, 35%) as an off-white powder. 1H NMR (400 MHz, DMSO) δ 7.83 (s, 1H), 7.43 (dd, J=8.3, 7.1 Hz, 1H), 7.07-6.87 (m, 2H), 6.47 (br s, 2H), 4.49 (dd, J=11.9, 6.3 Hz, 1H), 3.27-3.10 (m, 2H), 2.19 (dt, J=12.0, 7.7 Hz, 1H), 2.05-1.72 (m, 3H). MS (ESI) m/z calcd for C13H14N3O3 [M+H]+ 260.3, found: 260.9. Volatiles were removed in vacuo the dark-brown crude residue was purified by preparative reverse phase HPLC

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzophenone imine (3 mL, 17.87 mmol) was added to a solution of 3-aminopiperidin-2-one [CAS 1892-22-4] (2 g, 17.52 mmol) and molecular sieves in DCE (50 mL) under nitrogen and the reaction was warmed to 80° C. for 18 hours. The solvent was evaporated and the residue applied to a 100 g SNAP column, eluting with 50 to 100% EtOAc/ihexane to afford 3-(benzhydrylideneamino)-piperidin-2-one (D21) (3.84 g, 13.796 mmol, 78.7% yield) as a colourless solid. The solvent was evaporated eluting with 50 to 100% EtOAc/ihexane

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzophenone imine (3 mL, 17.87 mmol) was added to a solution of 3-aminopiperidin-2-one [CAS 1892-22-4] (2 g, 17.52 mmol) and molecular sieves in DCE (50 mL) under nitrogen and the reaction was warmed to 80° C. for 18 hours. The solvent was evaporated and the residue applied to a 100 g SNAP column, eluting with 50 to 100% EtOAc/ihexane to afford 3-(benzhydrylideneamino)-piperidin-2-one (D21) (3.84 g, 13.796 mmol, 78.7% yield) as a colourless solid. The solvent was evaporated eluting with 50 to 100% EtOAc/ihexane

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: Prepared according to the procedure described for example 44 from 5-[(3,5-dichloro-4-pyridyl)sulfanyl]-4-nitro-thiophene-2-carboxylic acid (35 mg, 0.1 mmol) and 3-aminopiperidin-2-one (11.4 mg, 0.1 mmol). The title compound was obtained as a solid (10.4 mg, 23% yield). MS m/z: 446 [M+H]+. Prepared

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-aminophthalic acid (0.100 g, 0.552 mmol) in DMF (1.1 mL) was added 3-aminopiperidine-2-one (0.063 g, 0.552 mmol) and the reaction was stirred at 90° C. over 18 h. Volatiles were removed in vacuo and the dark-brown crude residue was purified by preparative reverse phase HPLC to give the desired product 28 (0.050 g, 35%) as an off-white powder. 1H NMR (400 MHz, DMSO) δ 7.83 (s, 1H), 7.43 (dd, J=8.3, 7.1 Hz, 1H), 7.07-6.87 (m, 2H), 6.47 (br s, 2H), 4.49 (dd, J=11.9, 6.3 Hz, 1H), 3.27-3.10 (m, 2H), 2.19 (dt, J=12.0, 7.7 Hz, 1H), 2.05-1.72 (m, 3H). MS (ESI) m/z calcd for C13H14N3O3 [M+H]+ 260.3, found: 260.9. Volatiles were removed in vacuo the dark-brown crude residue was purified by preparative reverse phase HPLC

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Benzophenone imine (3 mL, 17.87 mmol) was added to a solution of 3-aminopiperidin-2-one [CAS 1892-22-4] (2 g, 17.52 mmol) and molecular sieves in DCE (50 mL) under nitrogen and the reaction was warmed to 80° C. for 18 hours. The solvent was evaporated and the residue applied to a 100 g SNAP column, eluting with 50 to 100% EtOAc/ihexane to afford 3-(benzhydrylideneamino)-piperidin-2-one (D21) (3.84 g, 13.796 mmol, 78.7% yield) as a colourless solid. The solvent was evaporated eluting with 50 to 100% EtOAc/ihexane