3-(1-methylpiperidin-4-yl)propan-1-ol

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

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

Conditions: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 1.45 g of 3-(1-methylpiperidin-4-yl)propan-1-ol in 40 ml of tetrahydrofuran are added 360 mg of sodium hydride. The white suspension formed is stirred for 15 minutes at 65° C., cooled and mixed with 1.45 g of 4-[(3-bromophenyl)amino]-7-fluoro-6-nitroquinazoline, whereupon the mixture suddenly turns dark red. The reaction mixture is stirred first for 10 minutes at ambient temperature, then for 45 minutes at 65° C. As the reaction is not yet complete, a further 150 mg of sodium hydride are added and the mixture is stirred for a further 45 minutes at 65° C. The solvent is distilled off using a rotary evaporator and the brown residue is stirred with 50 ml of ice water. The aqueous phase is extracted with methylene chloride. The combined extracts are washed with water, dried over sodium sulfate and concentrated by evaporation. The crude product is purified by chromatography over a silica gel column with methylene chloride/methanol/concentrated ammonia solution (90:10:0.05). Yield: 1.30 g of (65% of theory); Rf value: 0.28 (silica gel, methylene chloride/methanol/concentrated aqueous ammonia solution=90:10:0.1); mass spectrum (ESI+): m/z=500, 502 [M+H]+. The white suspension formed cooled The reaction mixture is stirred first for 10 minutes at ambient temperature for 45 minutes at 65° C the mixture is stirred for a further 45 minutes at 65° C The solvent is distilled off a rotary evaporator the brown residue is stirred with 50 ml of ice water The aqueous phase is extracted with methylene chloride The combined extracts are washed with water dried over sodium sulfate concentrated by evaporation The crude product is purified by chromatography over a silica gel column with methylene chloride/methanol/concentrated ammonia solution (90:10:0.05)

Conditions: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 1.45 g of 3-(1-methylpiperidin-4-yl)propan-1-ol in 40 ml of tetrahydrofuran are added 360 mg of sodium hydride. The white suspension formed is stirred for 15 minutes at 65° C., cooled and mixed with 1.45 g of 4-[(3-bromophenyl)amino]-7-fluoro-6-nitroquinazoline, whereupon the mixture suddenly turns dark red. The reaction mixture is stirred first for 10 minutes at ambient temperature, then for 45 minutes at 65° C. As the reaction is not yet complete, a further 150 mg of sodium hydride are added and the mixture is stirred for a further 45 minutes at 65° C. The solvent is distilled off using a rotary evaporator and the brown residue is stirred with 50 ml of ice water. The aqueous phase is extracted with methylene chloride. The combined extracts are washed with water, dried over sodium sulfate and concentrated by evaporation. The crude product is purified by chromatography over a silica gel column with methylene chloride/methanol/concentrated ammonia solution (90:10:0.05). Yield: 1.30 g of (65% of theory); Rf value: 0.28 (silica gel, methylene chloride/methanol/concentrated aqueous ammonia solution=90:10:0.1); mass spectrum (ESI+): m/z=500, 502 [M+H]+. The white suspension formed cooled The reaction mixture is stirred first for 10 minutes at ambient temperature for 45 minutes at 65° C the mixture is stirred for a further 45 minutes at 65° C The solvent is distilled off a rotary evaporator the brown residue is stirred with 50 ml of ice water The aqueous phase is extracted with methylene chloride The combined extracts are washed with water dried over sodium sulfate concentrated by evaporation The crude product is purified by chromatography over a silica gel column with methylene chloride/methanol/concentrated ammonia solution (90:10:0.05)

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-[3-(1-Methyl-Piperidin-4-yl)-propoxy]-nicotinonitrile. To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol, 1.1 equiv) in DMF (200 mL) under an atmosphere of nitrogen, was added 60% sodium hydride (1.73 g, 43.3 mmol, 1.5 equiv) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h then cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol, 1.0 equiv) in DMF (20 mL) was then added and the mixture stirred for 16 h. The reaction was quenched with satd. aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the desired product. The filtrate was concentrated to half the volume and a second crop of precipitate was collected and combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (electrospray): mass calculated for C15H21N3O, 259.17; m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8 Hz, 1H), 7.77 (dd, J=8.6, 2.3 Hz, 1H), 6.80 (dd, J=8.6, 0.8 Hz, 1H), 4.34 (t, J=6.6 Hz, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H). then cooled to rt The reaction was quenched with satd A precipitate was formed was collected by vacuum filtration

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-[3-(1-Methyl-Piperidin-4-yl)-propoxy]-nicotinonitrile. To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol, 1.1 equiv) in DMF (200 mL) under an atmosphere of nitrogen, was added 60% sodium hydride (1.73 g, 43.3 mmol, 1.5 equiv) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h then cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol, 1.0 equiv) in DMF (20 mL) was then added and the mixture stirred for 16 h. The reaction was quenched with satd. aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the desired product. The filtrate was concentrated to half the volume and a second crop of precipitate was collected and combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (electrospray): mass calculated for C15H21N3O, 259.17; m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8 Hz, 1H), 7.77 (dd, J=8.6, 2.3 Hz, 1H), 6.80 (dd, J=8.6, 0.8 Hz, 1H), 4.34 (t, J=6.6 Hz, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H). then cooled to rt The reaction was quenched with satd A precipitate was formed was collected by vacuum filtration

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-[3-(1-Methyl-Piperidin-4-yl)-propoxy]-nicotinonitrile. To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol, 1.1 equiv) in DMF (200 mL) under an atmosphere of nitrogen, was added 60% sodium hydride (1.73 g, 43.3 mmol, 1.5 equiv) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h then cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol, 1.0 equiv) in DMF (20 mL) was then added and the mixture stirred for 16 h. The reaction was quenched with satd. aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the desired product. The filtrate was concentrated to half the volume and a second crop of precipitate was collected and combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (electrospray): mass calculated for C15H21N3O, 259.17. m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8 Hz, 1H), 7.77 (dd, J=8.6, 2.3 Hz, 1H), 6.80 (dd, J=8.6, 0.8 Hz, 1H), 4.34 (t, J=6.6 Hz, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H). then cooled to rt The reaction was quenched with satd A precipitate was formed was collected by vacuum filtration

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

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol) in DMF (200 mL), was added NaH (60%; 1.73 g, 43.3 mmol) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h, and then was cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol) in DMF (20 mL) was then added and the mixture was stirred for 16 h before quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the product. The filtrate was concentrated to half the volume and a second crop of precipitate was recovered. The precipitates were combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (ESI): mass calcd for C15H21N3O, 259.17; m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8, 1H), 7.77 (dd, J=8.6, 2.3, 1H), 6.80 (dd, J=8.6, 0.8, 1H), 4.34 (t, J=6.6, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H). was cooled to rt before quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL) A precipitate was formed was collected by vacuum filtration

Conditions: temp:60.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 3-(1-methyl-piperidin-4-yl)-propan-1-ol (5.0 g, 31.7 mmol) in DMF (200 mL), was added NaH (60%; 1.73 g, 43.3 mmol) portion wise. Once the initial effervescence had subsided, the mixture was heated at 60° C. for 1 h, and then was cooled to rt. A solution of 6-chloronicotinonitrile (4.0 g, 28.9 mmol) in DMF (20 mL) was then added and the mixture was stirred for 16 h before quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL). A precipitate was formed and was collected by vacuum filtration to afford 3.67 g of the product. The filtrate was concentrated to half the volume and a second crop of precipitate was recovered. The precipitates were combined to give 5.64 g (76%) of an orange solid, which was used without further purification. MS (ESI): mass calcd for C15H21N3O, 259.17; m/z found, 260.4 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.46 (dd, J=2.3, 0.8, 1H), 7.77 (dd, J=8.6, 2.3, 1H), 6.80 (dd, J=8.6, 0.8, 1H), 4.34 (t, J=6.6, 2H), 2.96-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.68 (m, 7H), 1.37-1.34 (m, 2H), 0.89-0.81 (m, 2H). was cooled to rt before quenching with saturated (satd.) aq. NaHCO3 (50 mL) and brine (50 mL) A precipitate was formed was collected by vacuum filtration

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

Procedure: To an ice-cooled solution of 2-methyl-4-hydroxybenzaldehyde (722 mg, 5.3 mmol), PPh3 polymer resin (3 mmol/g, 2.2 g, 6.4 mmol), and 3-(1-methyl-piperidin-4-yl)-propan-1-ol (833 mg, 5.3 mmol, 1.0 equiv) in THF (25 mL) was added di-tert-butyl-azodicarboxylate (1.47 g, 6.4 mmol). The reaction mixture was allowed to warm to rt and was stirred for 16 h. The mixture was filtered through diatomaceous earth, diluted with water, and extracted three times with EtOAc. The combined extracts were dried (Na2SO4) and concentrated. Purification by Method 1 afforded 578 mg (40%) of the desired aldehyde. MS (ESI): mass calcd for C16H23NO2, 261.17; m/z found, 262.2 [M+H]+. 1H NMR (400 MHz, CDCl3): 9.85 (s, 1H), 7.80 (d, J=8.6, 2H), 6.97 (d, J=8.6, 2H), 4.01 (t, J=6.4, 2H), 2.84-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.78 (m, 4H), 1.71-1.69 (m, 2H), 1.41-1.37 (m, 2H), 1.29-1.26 (m, 3H). The mixture was filtered through diatomaceous earth diluted with water extracted three times with EtOAc The combined extracts were dried (Na2SO4) concentrated Purification by Method 1

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

Procedure: To an ice-cooled solution of 2-methyl-4-hydroxybenzaldehyde (722 mg, 5.3 mmol), PPh3 polymer resin (3 mmol/g, 2.2 g, 6.4 mmol), and 3-(1-methyl-piperidin-4-yl)-propan-1-ol (833 mg, 5.3 mmol, 1.0 equiv) in THF (25 mL) was added di-tert-butyl-azodicarboxylate (1.47 g, 6.4 mmol). The reaction mixture was allowed to warm to rt and was stirred for 16 h. The mixture was filtered through diatomaceous earth, diluted with water, and extracted three times with EtOAc. The combined extracts were dried (Na2SO4) and concentrated. Purification by Method 1 afforded 578 mg (40%) of the desired aldehyde. MS (ESI): mass calcd for C16H23NO2, 261.17; m/z found, 262.2 [M+H]+. 1H NMR (400 MHz, CDCl3): 9.85 (s, 1H), 7.80 (d, J=8.6, 2H), 6.97 (d, J=8.6, 2H), 4.01 (t, J=6.4, 2H), 2.84-2.82 (m, 2H), 2.25 (s, 3H), 1.92-1.78 (m, 4H), 1.71-1.69 (m, 2H), 1.41-1.37 (m, 2H), 1.29-1.26 (m, 3H). The mixture was filtered through diatomaceous earth diluted with water extracted three times with EtOAc The combined extracts were dried (Na2SO4) concentrated Purification by Method 1