1-(4-benzylpiperazin-1-yl)-2-methoxyethanone

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

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (2.60 g) in dry THF (30 mL) at −10° C. was added titanium isopropoxide (3.22 mL), followed by ethyl magnesium bromide (1.0M solution in THF, 22.05 mL). The reaction mixture was heated to reflux for 2 days. After cooling the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the solvent removed in vacuo. The residue was purified using flash chromatography to yield 1-benzyl-4-(1-methoxymethyl-cyclopropyl)-piperazine (452 mg) and 1-benzyl-4-(1-ethyl-1-methoxymethyl-propyl)-piperazine (248 mg). Transfer hydrogenation conditions using ammonium formate and 10% Pd/C in MeOH afforded the desired compound. The reaction mixture was heated to reflux for 2 days After cooling the reaction mixture was cooled washed with brine dried (MgSO4) the solvent removed in vacuo The residue was purified

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (6.14 g) in dry THF (80 mL) at −10° C. was added zirconium chloride (5.76 g). After 30 minutes methyl magnesium bromide (3.0M solution in ether, 49.6 mL) was added in a dropwise manner. The reaction mixture was allowed to warm to room temperature. After stirring for 1 day, the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the was solvent removed in vacuo. The resulting residue was purified using flash chromatography to yield 1-benzyl-4-(2-methoxy-1,1-dimethyl-ethyl)-piperazine. Subsequent transfer hydrogenation, using ammonium formate and 10% palladium on carbon in MeOH, furnished the desired compound. the reaction mixture was cooled washed with brine dried (MgSO4) the was solvent removed in vacuo The resulting residue was purified

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (6.14 g) in dry THF (80 mL) at −10° C. was added zirconium chloride (5.76 g). After 30 minutes methyl magnesium bromide (3.0M solution in ether, 49.6 mL) was added in a dropwise manner. The reaction mixture was allowed to warm to room temperature. After stirring for 1 day, the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the was solvent removed in vacuo. The resulting residue was purified using flash chromatography to yield 1-benzyl-4-(2-methoxy-1,1-dimethyl-ethyl)-piperazine. Subsequent transfer hydrogenation, using ammonium formate and 10% palladium on carbon in MeOH, furnished the desired compound. the reaction mixture was cooled washed with brine dried (MgSO4) the was solvent removed in vacuo The resulting residue was purified

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

Procedure: Amine preparation: a mixture of benzylpiperazine, methoxyacetyl chloride and triethylamine was stirred in DCM for 2 h to yield 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone following standard work up.

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

Procedure: Amine preparation: a mixture of benzylpiperazine, methoxyacetyl chloride and triethylamine was stirred in DCM for 2 h to yield 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone following standard work up.

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

Procedure: Amine preparation: a mixture of benzylpiperazine, methoxyacetyl chloride and triethylamine was stirred in DCM for 2 h to yield 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone following standard work up.

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (2.60 g) in dry THF (30 mL) at −10° C. was added titanium isopropoxide (3.22 mL), followed by ethyl magnesium bromide (1.0M solution in THF, 22.05 mL). The reaction mixture was heated to reflux for 2 days. After cooling the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the solvent removed in vacuo. The residue was purified using flash chromatography to yield 1-benzyl-4-(1-methoxymethyl-cyclopropyl)-piperazine (452 mg) and 1-benzyl-4-(1-ethyl-1-methoxymethyl-propyl)-piperazine (248 mg). Transfer hydrogenation conditions using ammonium formate and 10% Pd/C in MeOH afforded the desired compound. The reaction mixture was heated to reflux for 2 days After cooling the reaction mixture was cooled washed with brine dried (MgSO4) the solvent removed in vacuo The residue was purified

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (6.14 g) in dry THF (80 mL) at −10° C. was added zirconium chloride (5.76 g). After 30 minutes methyl magnesium bromide (3.0M solution in ether, 49.6 mL) was added in a dropwise manner. The reaction mixture was allowed to warm to room temperature. After stirring for 1 day, the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the was solvent removed in vacuo. The resulting residue was purified using flash chromatography to yield 1-benzyl-4-(2-methoxy-1,1-dimethyl-ethyl)-piperazine. Subsequent transfer hydrogenation, using ammonium formate and 10% palladium on carbon in MeOH, furnished the desired compound. the reaction mixture was cooled washed with brine dried (MgSO4) the was solvent removed in vacuo The resulting residue was purified

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

Procedure: Amine preparation: a mixture of benzylpiperazine, methoxyacetyl chloride and triethylamine was stirred in DCM for 2 h to yield 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone following standard work up.

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (2.60 g) in dry THF (30 mL) at −10° C. was added titanium isopropoxide (3.22 mL), followed by ethyl magnesium bromide (1.0M solution in THF, 22.05 mL). The reaction mixture was heated to reflux for 2 days. After cooling the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the solvent removed in vacuo. The residue was purified using flash chromatography to yield 1-benzyl-4-(1-methoxymethyl-cyclopropyl)-piperazine (452 mg) and 1-benzyl-4-(1-ethyl-1-methoxymethyl-propyl)-piperazine (248 mg). Transfer hydrogenation conditions using ammonium formate and 10% Pd/C in MeOH afforded the desired compound. The reaction mixture was heated to reflux for 2 days After cooling the reaction mixture was cooled washed with brine dried (MgSO4) the solvent removed in vacuo The residue was purified

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

Procedure: To a solution of 1-(4-benzyl-piperazin-1-yl)-2-methoxy-ethanone (6.14 g) in dry THF (80 mL) at −10° C. was added zirconium chloride (5.76 g). After 30 minutes methyl magnesium bromide (3.0M solution in ether, 49.6 mL) was added in a dropwise manner. The reaction mixture was allowed to warm to room temperature. After stirring for 1 day, the reaction mixture was cooled, diluted with chloroform, washed with brine, dried (MgSO4) and the was solvent removed in vacuo. The resulting residue was purified using flash chromatography to yield 1-benzyl-4-(2-methoxy-1,1-dimethyl-ethyl)-piperazine. Subsequent transfer hydrogenation, using ammonium formate and 10% palladium on carbon in MeOH, furnished the desired compound. the reaction mixture was cooled washed with brine dried (MgSO4) the was solvent removed in vacuo The resulting residue was purified