methyl 2-amino-2-(4-fluorophenyl)acetate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (-)-3-bromocamphor-8-sulphonic acid ((-)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0°-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0°-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0°-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (-)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (-)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. The mixture was cooled to 0°-5° C. for 1 h the solid collected washed with isopropyl acetate dried in vacuo

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (-)-3-bromocamphor-8-sulphonic acid ((-)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0°-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0°-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0°-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (-)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (-)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. cooled to 0°-5° C The solid was collected washed with isopropyl acetate dried in vacuo

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 4-Fluoro-α-[(phenylmethyl)amino]benzeneacetic acid methyl ester hydrochloride (12.2 kg, 39.4 moles) was added to a slurry of 10% palladium-on-carbon (1.2 kg) in isopropanol (50 L). Ammonium formate (5.0 kg, 79.4 moles) was added and the batch was heated to 50° C. Progress of the reaction was monitored by HPLC. The batch was filtered through Hyflo Supercel and the filter cake was washed with isopropanol (25 L). The filtrate was evaporated to low volume and flushed with isopropyl acetate (50 L). The residue was dissolved in isopropyl acetate (30 L) and washed with 5% aqueous potassium phosphate (40 L), followed by saturated aqueous sodium chloride (10 L). The solution was evaporated under vacuum to give 5.79 kg (87% yield) of racemic α-amino-4-fluorobenzeneacetic acid methyl ester. The batch was filtered through Hyflo Supercel the filter cake was washed with isopropanol (25 L) The filtrate was evaporated to low volume flushed with isopropyl acetate (50 L) The residue was dissolved in isopropyl acetate (30 L) washed with 5% aqueous potassium phosphate (40 L) The solution was evaporated under vacuum

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (-)-3-bromocamphor-8-sulphonic acid ((-)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (-)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (-)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. The mixture was cooled to 0-5° C. for 1 h the solid collected washed with isopropyl acetate dried in vacuo

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (-)-3-bromocamphor-8-sulphonic acid ((-)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (-)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (-)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (-)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. cooled to 0-5° C The solid was collected washed with isopropyl acetate dried in vacuo

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 4-Fluoro-α-[(phenylmethyl)amino]benzeneacetic acid methyl ester hydrochloride (12.2 kg, 39.4 moles) was added to a slurry of 10% palladium-on-carbon (1.2 kg) in isopropanol (50 L). Ammonium formate (5.0 kg, 79.4 moles) was added and the batch was heated to 50° C. Progress of the reaction was monitored by HPLC. The batch was filtered through Hyflo Supercel and the filter cake was washed with isopropanol (25 L). The filtrate was evaporated to low volume and flushed with isopropyl acetate (50 L). The residue was dissolved in isopropyl acetate (30 L) and washed with 5% aqueous potassium phosphate (40 L), followed by saturated aqueous sodium chloride (10 L). The solution was evaporated under vacuum to give 5.79 kg (87% yield) of racemic α-amino-4-fluorobenzeneacetic acid methyl ester. The batch was filtered through Hyflo Supercel the filter cake was washed with isopropanol (25 L) The filtrate was evaporated to low volume flushed with isopropyl acetate (50 L) The residue was dissolved in isopropyl acetate (30 L) washed with 5% aqueous potassium phosphate (40 L) The solution was evaporated under vacuum

反応条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 4-Fluoro-α-[(phenylmethyl)amino]benzeneacetic acid methyl ester hydrochloride (12.2 kg, 39.4 moles) was added to a slurry of 10% palladium-on-carbon (1.2 kg) in isopropanol (50 L). Ammonium formate (5.0 kg, 79.4 moles) was added and the batch was heated to 50° C. Progress of the reaction was monitored by HPLC. The batch was filtered through Hyflo Supercel and the filter cake was washed with isopropanol (25 L). The filtrate was evaporated to low volume and flushed with isopropyl acetate (50 L). The residue was dissolved in isopropyl acetate (30 L) and washed with 5% aqueous potassium phosphate (40 L), followed by saturated aqueous sodium chloride (10 L). The solution was evaporated under vacuum to give 5.79 kg (87% yield) of racemic α-amino-4-fluorobenzeneacetic acid methyl ester. The batch was filtered through Hyflo Supercel the filter cake was washed with isopropanol (25 L) The filtrate was evaporated to low volume flushed with isopropyl acetate (50 L) The residue was dissolved in isopropyl acetate (30 L) washed with 5% aqueous potassium phosphate (40 L) The solution was evaporated under vacuum

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (−)-3-bromocamphor-8-7sulphonic acid ((−)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (−)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (−)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. The mixture was cooled to 0-5° C. for 1 h the solid collected washed with isopropyl acetate dried in vacuo

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (−)-3-bromocamphor-8-7sulphonic acid ((−)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (−)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (−)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. The mixture was cooled to 0-5° C. for 1 h the solid collected washed with isopropyl acetate dried in vacuo

反応条件: temp:65.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 3-(4-fluorophenyl)-4-phenylmethyl-2-morpholinone (i.e. N-benzyl-4-fluorophenyl-1,4-oxazin-2-one) (10 g) in isopropyl acetate (110 ml) at room temperature was added a solution of (−)-3-bromocamphor-8-7sulphonic acid ((−)-3BCS) (12 g) in acetonitrile (24 ml). Crystallisation began after 2-3 min. The slurry was stirred for 1 h at room temperature. Trifluoroacetic acid (7 ml) was added and the mixture stirred at 65° C. for 3 days. The mixture was cooled to 0-5° C., aged for 1 h. and the solid collected, washed with isopropyl acetate and dried in vacuo at 40° C., to give the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 17.24 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 79%(R), 21%(S). The liquors were stirred at 65° C. for 3 days, then cooled to 0-5° C. The solid was collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 0.84 g, ee 98.6% (S) isomer. The chiral composition of the remaining liquors was determined as 64%(R), 36%(S). The liquors were stripped in vacuo and the residue was dissolved in isopropyl acetate (20 ml) containing trifluoroacetic acid (1 ml) and stirred at 65° C. for 20 h. The mixture was cooled to 0-5° C. for 1 h and the solid collected, washed with isopropyl acetate and dried in vacuo to give a further batch of the N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one (−)-3BCS salt: yield 2.2 g, ee 99.2% (S) isomer. Total weight of (−)-3BCS salt: 20.28 g, 97% yield. A sample (0.5 g) of the (−)-3BCS salt was retained and the remainder converted back to free base. The salt was partitioned between isopropyl acetate (50 ml) and water (100 ml) containing 0.88 ammonia soln. (3 ml). The layers were separated and the aqueous phase extracted with isopropyl acetate (25 ml). The combined organic phases were washed with water (25 ml). The organic phase was concentrated to residue and flushed with isopropyl acetate to give the 3-(S)-(4-fluorophenyl)-4phenylmethyl-2-morpholinone (i.e. N-benzyl-3-(S)-(4-fluorophenyl)-1,4-oxazin-2-one) as the free base: yield 8.7 g, 93% recovery, ee 98.4% (S) isomer. cooled to 0-5° C The solid was collected washed with isopropyl acetate dried in vacuo