1-(2-propan-2-yloxyphenyl)piperazine

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

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

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

Procedure: 108 mg of the target compound (0.28 mmol, 50.8%) was obtained using 1-(2-isopropoxyphenyl)piperazine (240 mg, 1.09 mmol), biphenyl-2-carbaldehyde (100 mg, 0.55 mmol) and NaBH(OAc)3 (355 mg, 1.65 mmol) according to the synthesis method of Compound 1.

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

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

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

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

Procedure: A solution of α,α'-dichoro-p-xylene(30.40 g, 0.174 mol), N-[2-(1-methylethoxy)phenyl]piperazine (12.70 g, 0.058 mol), triethylamine (6.08 g, 0.06 mol), and THF (200 mL) was refluxed for 4 h. Ether (100 mL) and 1N HCl (100 mL) were added producing a white suspension which was filtered to give 4-[[1-[2-(1-methylethoxy)phenyl]-4-piperazinyl]methyl]benzyl chloride hydrochloride. producing a white suspension which was filtered

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

Procedure: A solution of α,α'-dichoro-p-xylene(30.40 g, 0.174 mol), N-[2-(1-methylethoxy)phenyl]piperazine (12.70 g, 0.058 mol), triethylamine (6.08 g, 0.06 mol), and THF (200 mL) was refluxed for 4 h. Ether (100 mL) and 1N HCl (100 mL) were added producing a white suspension which was filtered to give 4-[[1-[2-(1-methylethoxy)phenyl]-4-piperazinyl]methyl]benzyl chloride hydrochloride. producing a white suspension which was filtered

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-[2-(1-methylethoxy)phenyl]piperazine (9.38 g, 0.043 mole) as described in U.S. Pat. Nos. 4,547,505 and 4,438,115, glacial acetic acid (2.57 mL, 0.043 mole), and methanol (27 mL) was cooled in an ice bath and treated with 37% formalin (3.18 mL, 0.043 mole). A solution of 1-(1-methylpyrrol-2-ylmethyl)-2-piperidinone (8.19 g, 0.043 mole) and methanol (27 mL) was added and the resulting solution was stirred overnight at 25° C. under a dry nitrogen atmosphere. Methylene chloride (350 mL) was added followed by 3N sodium hydroxide solution (60 mL). After thorough mixing, the organic layer was separated, dried over anhydrous potassium carbonate, filtered and evaporated to give 18.20 g of 1-[[1-methyl-5-[[4-[2-(1-methylethoxy)phenyl]-1 -piperazinyl]methyl]-lH-pyrrol-2-yl]methyl]-2- piperidinone as a Yellow oil. This material (2.50 g) was dissolved in 6 mL ethanol and treated with 0.68 g of oxalic acid. The mixture was heated to effect solution, cooled and ether added until just cloudy. After cooling in an ice bath, a white solid was obtained by filtration. This was recrystallized twice from ethanol-ether using activated charcoal to give the oxalate salt, mp 139.5-140.5° C. (Ho). After thorough mixing, the organic layer was separated dried over anhydrous potassium carbonate filtered evaporated

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 1-[2-(1-methylethoxy)phenyl]piperazine (9.38 g, 0.043 mole) as described in U.S. Pat. Nos. 4,547,505 and 4,438,115, glacial acetic acid (2.57 mL, 0.043 mole), and methanol (27 mL) was cooled in an ice bath and treated with 37% formalin (3.18 mL, 0.043 mole). A solution of 1-(1-methylpyrrol-2-ylmethyl)-2-piperidinone (8.19 g, 0.043 mole) and methanol (27 mL) was added and the resulting solution was stirred overnight at 25° C. under a dry nitrogen atmosphere. Methylene chloride (350 mL) was added followed by 3N sodium hydroxide solution (60 mL). After thorough mixing, the organic layer was separated, dried over anhydrous potassium carbonate, filtered and evaporated to give 18.20 g of 1-[[1-methyl-5-[[4-[2-(1-methylethoxy)phenyl]-1 -piperazinyl]methyl]-lH-pyrrol-2-yl]methyl]-2- piperidinone as a Yellow oil. This material (2.50 g) was dissolved in 6 mL ethanol and treated with 0.68 g of oxalic acid. The mixture was heated to effect solution, cooled and ether added until just cloudy. After cooling in an ice bath, a white solid was obtained by filtration. This was recrystallized twice from ethanol-ether using activated charcoal to give the oxalate salt, mp 139.5-140.5° C. (Ho). After thorough mixing, the organic layer was separated dried over anhydrous potassium carbonate filtered evaporated

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

Procedure: A mixture of 1-[2-(methylethoxy)phenyl]piperazine (IPP, 7.28 g, 0.033 mol), 3-acetylbenzonitrile (4.80 g, 0.033 mol), and titanium isopropoxide (11.74 g, 0.041 mol) was stirred at room temperature for 2 h, heated to 80° C. for several minutes, and then cooled to room temperature. Methanol (150 mL) was added and the mixture was heated to dissolve most of the solids. After cooling to room temperature, sodium borohydride (2.27 g, 0.060 mol) was added in portions and the mixture was stirred overnight at room temperature. The reaction mixture was concentrated on a rotary evaporator and the residue was partitioned between 3N NaOH/CH2Cl2. The organic layer was separated, dried (K2CO3), filtered, and evaporated to an oily residue which was passed through flash grade silica using 4:1 hexane:EtOAc as eluant to give 3-[1-[4-[2-(1-methylethoxy)phenyl]-1-piperazinyl]ethyl]benzonitrile as an oil (1.55 g, 13.5%). heated to 80° C. for several minutes cooled to room temperature the mixture was heated to dissolve most of the solids After cooling to room temperature the mixture was stirred overnight at room temperature The reaction mixture was concentrated on a rotary evaporator the residue was partitioned between 3N NaOH/CH2Cl2 The organic layer was separated dried (K2CO3) filtered evaporated to an oily residue which

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

Procedure: Compound 11 was prepared using the method described in Example 3, starting with compound 2 (1.0 g, 2.60 mmol), 1-(2-isopropoxyphenyl)piperazine (0.63 g, 2.86 mmol), and cesium carbonate (1.27 g, 3.90 mmol) to give 11 (0.49 g, 37%); C30H40ClN3O2, LRMS (m/z)=511 (MH+). Compound 11 was prepared