1-[(4-methoxyphenyl)methyl]piperidin-2-one

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 1-(4-methoxybenzyl)piperidin-2-one (50.0 g) was added aqueous 4N sodium hydroxide solution (228 ml) and then the mixture was refluxed for a day. The mixture was cooled to 0° C. and concentrated hydrochloric acid (76 ml) was added thereto. The mixture was neutralized. Then, after adding sodium carbonate (53.8 g) and dimethyl sulfoxide (600 ml), 5-bromo-2-fluorobenzaldehyde (38.6 g) was added dropwise at 135° C. to the mixture. After refluxing for 5 hours, the mixture was neutralized with 3N hydrochloric acid at 0° C., and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, after which it was dried with magnesium sulfate. The solvent was distilled off under reduced pressure to give 5-((4-bromo-2-formylphenyl)(4-methoxybenzyl)amino)pentanoic acid (77.2 g) as a brown oily material. the mixture was refluxed for a day was added dropwise at 135° C. to the mixture After refluxing for 5 hours extracted with ethyl acetate The organic layer was washed with water and saturated brine after which it was dried with magnesium sulfate The solvent was distilled off under reduced pressure

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane ethyl acetate=1:1)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 1-(4-methoxybenzyl)piperidin-2-one (50.0 g) was added aqueous 4N sodium hydroxide solution (228 ml) and then the mixture was refluxed for a day. The mixture was cooled to 0° C. and concentrated hydrochloric acid (76 ml) was added thereto. The mixture was neutralized. Then, after adding sodium carbonate (53.8 g) and dimethyl sulfoxide (600 ml), 5-bromo-2-fluorobenzaldehyde (38.6 g) was added dropwise at 135° C. to the mixture. After refluxing for 5 hours, the mixture was neutralized with 3N hydrochloric acid at 0° C., and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, after which it was dried with magnesium sulfate. The solvent was distilled off under reduced pressure to give 5-((4-bromo-2-formylphenyl)(4-methoxybenzyl)amino)pentanoic acid (77.2 g) as a brown oily material. the mixture was refluxed for a day was added dropwise at 135° C. to the mixture After refluxing for 5 hours extracted with ethyl acetate The organic layer was washed with water and saturated brine after which it was dried with magnesium sulfate The solvent was distilled off under reduced pressure

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane ethyl acetate=1:1)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 1-(4-methoxybenzyl)piperidin-2-one (50.0 g) was added aqueous 4N sodium hydroxide solution (228 ml) and then the mixture was refluxed for a day. The mixture was cooled to 0° C. and concentrated hydrochloric acid (76 ml) was added thereto. The mixture was neutralized. Then, after adding sodium carbonate (53.8 g) and dimethyl sulfoxide (600 ml), 5-bromo-2-fluorobenzaldehyde (38.6 g) was added dropwise at 135° C. to the mixture. After refluxing for 5 hours, the mixture was neutralized with 3N hydrochloric acid at 0° C., and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, after which it was dried with magnesium sulfate. The solvent was distilled off under reduced pressure to give 5-((4-bromo-2-formylphenyl)(4-methoxybenzyl)amino)pentanoic acid (77.2 g) as a brown oily material. the mixture was refluxed for a day was added dropwise at 135° C. to the mixture After refluxing for 5 hours extracted with ethyl acetate The organic layer was washed with water and saturated brine after which it was dried with magnesium sulfate The solvent was distilled off under reduced pressure

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 1-(4-methoxybenzyl)piperidin-2-one (50.0 g) was added aqueous 4N sodium hydroxide solution (228 ml) and then the mixture was refluxed for a day. The mixture was cooled to 0° C. and concentrated hydrochloric acid (76 ml) was added thereto. The mixture was neutralized. Then, after adding sodium carbonate (53.8 g) and dimethyl sulfoxide (600 ml), 5-bromo-2-fluorobenzaldehyde (38.6 g) was added dropwise at 135° C. to the mixture. After refluxing for 5 hours, the mixture was neutralized with 3N hydrochloric acid at 0° C., and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, after which it was dried with magnesium sulfate. The solvent was distilled off under reduced pressure to give 5-((4-bromo-2-formylphenyl)(4-methoxybenzyl)amino)pentanoic acid (77.2 g) as a brown oily material. the mixture was refluxed for a day was added dropwise at 135° C. to the mixture After refluxing for 5 hours extracted with ethyl acetate The organic layer was washed with water and saturated brine after which it was dried with magnesium sulfate The solvent was distilled off under reduced pressure

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To 1-(4-methoxybenzyl)piperidin-2-one (50.0 g) was added aqueous 4N sodium hydroxide solution (228 ml) and then the mixture was refluxed for a day. The mixture was cooled to 0° C. and concentrated hydrochloric acid (76 ml) was added thereto. The mixture was neutralized. Then, after adding sodium carbonate (53.8 g) and dimethyl sulfoxide (600 ml), 5-bromo-2-fluorobenzaldehyde (38.6 g) was added dropwise at 135° C. to the mixture. After refluxing for 5 hours, the mixture was neutralized with 3N hydrochloric acid at 0° C., and extracted with ethyl acetate. The organic layer was washed with water and saturated brine, after which it was dried with magnesium sulfate. The solvent was distilled off under reduced pressure to give 5-((4-bromo-2-formylphenyl)(4-methoxybenzyl)amino)pentanoic acid (77.2 g) as a brown oily material. the mixture was refluxed for a day was added dropwise at 135° C. to the mixture After refluxing for 5 hours extracted with ethyl acetate The organic layer was washed with water and saturated brine after which it was dried with magnesium sulfate The solvent was distilled off under reduced pressure

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

Procedure: A suspension of potassium hydroxide (85%, 18.6 g) and tetrabutylammonium bromide (4.88 g) in toluene (250 ml) was refluxed overnight under nitrogen atmosphere using Deenschtark device. The mixture was cooled to 80° C., to which a solution of 2-piperidone (25.0 g) and 4-methoxybenzylchloride (51.3 g) in toluene (50 ml) were added dropwise. After refluxing for 8 hours, the reaction mixture was returned to room temperature and washed with water and saturated brine. The resultant was dried with magnesium sulfate, after which the solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give 1-(4-methoxybenzyl)piperidin-2-one (28.8 g) as a colorless oily material. was refluxed overnight under nitrogen atmosphere were added dropwise After refluxing for 8 hours was returned to room temperature washed with water and saturated brine The resultant was dried with magnesium sulfate after which the solvent was distilled off under reduced pressure the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)