(2S)-2-(dimethylamino)-4-methylpentanoic acid

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

Procedure: (S)-2-Dimethylamino-4-methyl-pentanoic acid (55.3 mg, 0.347 mmol) was dissolved in dry DMF (3 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added in succession N,N-diisopropylethylamine (0.180 mL, 1.04 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (132 mg, 0.347 mmol, Novabiochem, La Jolla, Calif.). The resulting reaction mixture was stirred at that temperature for 30 minutes, (S)-2-(4-benzyloxy-phenyl)-1-morpholin-4-ylmethyl-ethylamine (153 g, 0.347 mmol, Example 3, Step D) was then added. After an additional 60 minutes stirring at 0° C., the reaction mixture was mixed with 60 mL of diethyl ether, and the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine and then dried over Na2SO4. The solution was concentrated in vacuo, an oil was obtained. The crude product was purified by chromatography (silica gel, 10% methanol in chloroform) to give the title compound as a white solid (90 mg, 55%); mp 113-114° C. The resulting reaction mixture After an additional 60 minutes stirring at 0° C. the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine dried over Na2SO4 The solution was concentrated in vacuo an oil was obtained The crude product was purified by chromatography (silica gel, 10% methanol in chloroform)

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

Procedure: (S)-2-Dimethylamino-4-methyl-pentanoic acid (55.3 mg, 0.347 mmol) was dissolved in dry DMF (3 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added in succession N,N-diisopropylethylamine (0.180 mL, 1.04 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (132 mg, 0.347 mmol, Novabiochem, La Jolla, Calif.). The resulting reaction mixture was stirred at that temperature for 30 minutes, (S)-2-(4-benzyloxy-phenyl)-1-morpholin-4-ylmethyl-ethylamine (153 g, 0.347 mmol, Example 3, Step D) was then added. After an additional 60 minutes stirring at 0° C., the reaction mixture was mixed with 60 mL of diethyl ether, and the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine and then dried over Na2SO4. The solution was concentrated in vacuo, an oil was obtained. The crude product was purified by chromatography (silica gel, 10% methanol in chloroform) to give the title compound as a white solid (90 mg, 55%); mp 113-114° C. The resulting reaction mixture After an additional 60 minutes stirring at 0° C. the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine dried over Na2SO4 The solution was concentrated in vacuo an oil was obtained The crude product was purified by chromatography (silica gel, 10% methanol in chloroform)

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

Procedure: A solution of (S)-2-dimethylamino-4-methyl-pentanoic acid (433 mg, 2.72 mmol), N-methylmorpholine (0.275 mL, 2.50 mmol), and 4,4-bis-(4-fluoro-phenyl)-butylamine monohydrochloride (809 mg, 2.72 mmol) in dry DMF (12 mL) was treated with Triton® B (1.80 mL, 3.96 mmol, 40 weight percent solution in methanol, Aldrich, Milwaukee, Wis.). The clear solution was cooled to 0° C. in an ice-water bath. Solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (1.03 g, 2.72 mmol) was then added. After stirring at 0° C. for 30 minutes, the cooling bath was removed, and the stirring was continued at ambient temperature for 15 minutes. After this period, the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms and was removed by filtration. The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL), and was dried over Na2SO4. The solution was concentrated in vacuo affording a viscous oil. The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes). The free amine was dissolved in 5 mL of ethyl ether and treated with ethereal HCl to afford 361 mg (30%) of the pure titled compound as a white foam; mp 60-72° C. APCI-MS m/z 403.3 (MH+). the cooling bath was removed the stirring was continued at ambient temperature for 15 minutes After this period the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms was removed by filtration The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL) was dried over Na2SO4 The solution was concentrated in vacuo affording a viscous oil The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes) The free amine was dissolved in 5 mL of ethyl ether treated with ethereal HCl

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

Procedure: A solution of (S)-2-dimethylamino-4-methyl-pentanoic acid (433 mg, 2.72 mmol), N-methylmorpholine (0.275 mL, 2.50 mmol), and 4,4-bis-(4-fluoro-phenyl)-butylamine monohydrochloride (809 mg, 2.72 mmol) in dry DMF (12 mL) was treated with Triton® B (1.80 mL, 3.96 mmol, 40 weight percent solution in methanol, Aldrich, Milwaukee, Wis.). The clear solution was cooled to 0° C. in an ice-water bath. Solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (1.03 g, 2.72 mmol) was then added. After stirring at 0° C. for 30 minutes, the cooling bath was removed, and the stirring was continued at ambient temperature for 15 minutes. After this period, the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms and was removed by filtration. The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL), and was dried over Na2SO4. The solution was concentrated in vacuo affording a viscous oil. The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes). The free amine was dissolved in 5 mL of ethyl ether and treated with ethereal HCl to afford 361 mg (30%) of the pure titled compound as a white foam; mp 60-72° C. APCI-MS m/z 403.3 (MH+). the cooling bath was removed the stirring was continued at ambient temperature for 15 minutes After this period the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms was removed by filtration The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL) was dried over Na2SO4 The solution was concentrated in vacuo affording a viscous oil The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes) The free amine was dissolved in 5 mL of ethyl ether treated with ethereal HCl

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

Procedure: (S)-2-Dimethylamino-4-methyl-pentanoic acid (55.3 mg, 0.347 mmol) was dissolved in dry DMF (3 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added in succession N,N-diisopropylethylamine (0.180 mL, 1.04 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (132 mg, 0.347 mmol, Novabiochem, La Jolla, Calif.). The resulting reaction mixture was stirred at that temperature for 30 minutes, (S)-2-(4-benzyloxy-phenyl)-1-morpholin-4-ylmethyl-ethylamine (153 g, 0.347 mmol, Example 3, Step D) was then added. After an additional 60 minutes stirring at 0° C., the reaction mixture was mixed with 60 mL of diethyl ether, and the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine and then dried over Na2SO4. The solution was concentrated in vacuo, an oil was obtained. The crude product was purified by chromatography (silica gel, 10% methanol in chloroform) to give the title compound as a white solid (90 mg, 55%); mp 113-114° C. The resulting reaction mixture After an additional 60 minutes stirring at 0° C. the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine dried over Na2SO4 The solution was concentrated in vacuo an oil was obtained The crude product was purified by chromatography (silica gel, 10% methanol in chloroform)

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

Procedure: (S)-2-Dimethylamino-4-methyl-pentanoic acid (55.3 mg, 0.347 mmol) was dissolved in dry DMF (3 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added in succession N,N-diisopropylethylamine (0.180 mL, 1.04 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (132 mg, 0.347 mmol, Novabiochem, La Jolla, Calif.). The resulting reaction mixture was stirred at that temperature for 30 minutes, (S)-2-(4-benzyloxy-phenyl)-1-morpholin-4-ylmethyl-ethylamine (153 g, 0.347 mmol, Example 3, Step D) was then added. After an additional 60 minutes stirring at 0° C., the reaction mixture was mixed with 60 mL of diethyl ether, and the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine and then dried over Na2SO4. The solution was concentrated in vacuo, an oil was obtained. The crude product was purified by chromatography (silica gel, 10% methanol in chloroform) to give the title compound as a white solid (90 mg, 55%); mp 113-114° C. The resulting reaction mixture After an additional 60 minutes stirring at 0° C. the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine dried over Na2SO4 The solution was concentrated in vacuo an oil was obtained The crude product was purified by chromatography (silica gel, 10% methanol in chloroform)

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

Procedure: A solution of (S)-2-dimethylamino-4-methyl-pentanoic acid (433 mg, 2.72 mmol), N-methylmorpholine (0.275 mL, 2.50 mmol), and 4,4-bis-(4-fluoro-phenyl)-butylamine monohydrochloride (809 mg, 2.72 mmol) in dry DMF (12 mL) was treated with Triton® B (1.80 mL, 3.96 mmol, 40 weight percent solution in methanol, Aldrich, Milwaukee, Wis.). The clear solution was cooled to 0° C. in an ice-water bath. Solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (1.03 g, 2.72 mmol) was then added. After stirring at 0° C. for 30 minutes, the cooling bath was removed, and the stirring was continued at ambient temperature for 15 minutes. After this period, the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms and was removed by filtration. The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL), and was dried over Na2SO4. The solution was concentrated in vacuo affording a viscous oil. The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes). The free amine was dissolved in 5 mL of ethyl ether and treated with ethereal HCl to afford 361 mg (30%) of the pure titled compound as a white foam; mp 60-72° C. APCI-MS m/z 403.3 (MH+). the cooling bath was removed the stirring was continued at ambient temperature for 15 minutes After this period the reaction mixture was mixed with 60 mL of diethyl ether, white precipitate forms was removed by filtration The filtrate was successively washed with saturated aqueous NaHCO3 solution (50 mL), brine (2×50 mL) was dried over Na2SO4 The solution was concentrated in vacuo affording a viscous oil The crude product was purified by flash chromatography (5% MeOH in 1:1 EtOAc/hexanes) The free amine was dissolved in 5 mL of ethyl ether treated with ethereal HCl

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

Procedure: (S)-2-Dimethylamino-4-methyl-pentanoic acid (55.3 mg, 0.347 mmol) was dissolved in dry DMF (3 mL) under nitrogen atmosphere and cooled to 0° C. in an ice-water bath. To this solution were added in succession N,N-diisopropylethylamine (0.180 mL, 1.04 mmol) and solid O-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate (132 mg, 0.347 mmol, Novabiochem, La Jolla, Calif.). The resulting reaction mixture was stirred at that temperature for 30 minutes, (S)-2-(4-benzyloxy-phenyl)-1-morpholin-4-ylmethyl-ethylamine (153 g, 0.347 mmol, Example 3, Step D) was then added. After an additional 60 minutes stirring at 0° C., the reaction mixture was mixed with 60 mL of diethyl ether, and the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine and then dried over Na2SO4. The solution was concentrated in vacuo, an oil was obtained. The crude product was purified by chromatography (silica gel, 10% methanol in chloroform) to give the title compound as a white solid (90 mg, 55%); mp 113-114° C. The resulting reaction mixture After an additional 60 minutes stirring at 0° C. the resulting mixture was successively washed with saturated aqueous NaHCO3 solution and brine dried over Na2SO4 The solution was concentrated in vacuo an oil was obtained The crude product was purified by chromatography (silica gel, 10% methanol in chloroform)