2-piperazin-1-ylpropan-1-ol;dihydrochloride

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

Conditions: temp:85.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(6-fluoropyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.202 g, 0.67 mmol), 2-(piperazin-1-yl)propan-1-ol dihydrochloride (0.292 g, 1.34 mmol) and 1,1,3,3-tetramethylguanidine (0.310 g, 2.69 mmol) in dry DMSO (1.5 mL) was heated at 85° C. for 6 h. After that time the reaction was cooled to rt, diluted with water (15 mL) and extracted with ethyl acetate (2×30 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol) to give 2-(6-(4-(1-hydroxypropan-2-yl)piperazin-1-yl)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.155 g, 54%) as a yellow solid: mp 202-204° C.; 1H NMR (400 MHz, CDCl3) δ 10.30 (s, 1H), 7.87 (d, J=7.42 Hz, 1H), 7.64-7.72 (m, 1H), 6.79-6.88 (m, 2H) 6.49 (d, J=2.34 Hz, 1H) 3.99 (s, 3H), 3.94 (s, 3H), 3.61-3.72 (m, 4H), 3.38-3.52 (m, 2H), 2.89-2.99 (m, 1H), 2.78-2.88 (m, 2H), 2.54-2.64 (m, 2H), 0.97 (d, J=6.64 Hz, 3H); ESI MS m/z 426 [M+H]+. After that time the reaction was cooled to rt extracted with ethyl acetate (2×30 mL) The combined organic phase was washed with brine dried over sodium sulfate filtered concentrated under reduced pressure The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol)

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

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

Procedure: 1-(1-Hydroxy-2-propyl)-2-triphenylmethylpiperazine (1.69 g) obtained in step 2 was dissolved in ethanol (20 ml), and a 4 mol/l hydrogen chloride solution in ethyl acetate (10 ml) was dropwise added thereto. The mixture was stirred at room temperature for 10 minutes. The solvent was distilled off under reduced pressure, the residue was suspended in ethyl ether, and the precipitated crystals were collected by filtration to give Compound L (840 mg, 89%). The solvent was distilled off under reduced pressure the precipitated crystals were collected by filtration

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

Procedure: 2-(piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

Conditions: temp:85.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(6-fluoropyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.202 g, 0.67 mmol), 2-(piperazin-1-yl)propan-1-ol dihydrochloride (0.292 g, 1.34 mmol) and 1,1,3,3-tetramethylguanidine (0.310 g, 2.69 mmol) in dry DMSO (1.5 mL) was heated at 85° C. for 6 h. After that time the reaction was cooled to rt, diluted with water (15 mL) and extracted with ethyl acetate (2×30 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol) to give 2-(6-(4-(1-hydroxypropan-2-yl)piperazin-1-yl)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.155 g, 54%) as a yellow solid: mp 202-204° C.; 1H NMR (400 MHz, CDCl3) δ 10.30 (s, 1H), 7.87 (d, J=7.42 Hz, 1H), 7.64-7.72 (m, 1H), 6.79-6.88 (m, 2H) 6.49 (d, J=2.34 Hz, 1H) 3.99 (s, 3H), 3.94 (s, 3H), 3.61-3.72 (m, 4H), 3.38-3.52 (m, 2H), 2.89-2.99 (m, 1H), 2.78-2.88 (m, 2H), 2.54-2.64 (m, 2H), 0.97 (d, J=6.64 Hz, 3H); ESI MS m/z 426 [M+H]+. After that time the reaction was cooled to rt extracted with ethyl acetate (2×30 mL) The combined organic phase was washed with brine dried over sodium sulfate filtered concentrated under reduced pressure The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol)

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness

Conditions: temp:85.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-(6-fluoropyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.202 g, 0.67 mmol), 2-(piperazin-1-yl)propan-1-ol dihydrochloride (0.292 g, 1.34 mmol) and 1,1,3,3-tetramethylguanidine (0.310 g, 2.69 mmol) in dry DMSO (1.5 mL) was heated at 85° C. for 6 h. After that time the reaction was cooled to rt, diluted with water (15 mL) and extracted with ethyl acetate (2×30 mL). The combined organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated under reduced pressure. The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol) to give 2-(6-(4-(1-hydroxypropan-2-yl)piperazin-1-yl)pyridin-2-yl)-5,7-dimethoxyquinazolin-4(3H)-one (0.155 g, 54%) as a yellow solid: mp 202-204° C.; 1H NMR (400 MHz, CDCl3) δ 10.30 (s, 1H), 7.87 (d, J=7.42 Hz, 1H), 7.64-7.72 (m, 1H), 6.79-6.88 (m, 2H) 6.49 (d, J=2.34 Hz, 1H) 3.99 (s, 3H), 3.94 (s, 3H), 3.61-3.72 (m, 4H), 3.38-3.52 (m, 2H), 2.89-2.99 (m, 1H), 2.78-2.88 (m, 2H), 2.54-2.64 (m, 2H), 0.97 (d, J=6.64 Hz, 3H); ESI MS m/z 426 [M+H]+. After that time the reaction was cooled to rt extracted with ethyl acetate (2×30 mL) The combined organic phase was washed with brine dried over sodium sulfate filtered concentrated under reduced pressure The product was purified by flash column chromatography (silica gel, 97:3 dichloromethane/methanol to 95:5 dichloromethane/methanol)

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

Procedure: 2-(Piperazin-1-yl)propan-1-ol 2HCl (0.274 g, 1.26 mmol) was added to N-ethyl-N-propan-2-ylpropan-2-amine (0.330 mL, 1.89 mmol) in DMSO (5 mL). The reaction mixture was stirred at room temperature for 10 mins. N-[5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-fluorobenzamide (0.233 g, 0.63 mmol) was added and the mixture heated at 110° C. for 18 h under nitrogen. Heating was continued for 12 additional days. The reaction was cooled and the crude mixture was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product. The crude product was purified by preparative HPLC, using decreasingly polar mixtures of water (containing 1% NH3) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford the title compound (0.048 g, 15.44%) as a cream solid. the mixture heated at 110° C. for 18 h under nitrogen Heating The reaction was cooled the crude mixture was purified by ion exchange chromatography The desired product was eluted from the column were evaporated to dryness to afford crude product The crude product was purified by preparative HPLC Fractions containing the desired compound were evaporated to dryness