1-(5-bromo-2-fluorophenyl)-2-prop-2-enoxyethanone

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Scheme 1, steps C and D: To 4-bromo-1-fluoro-2-iodobenzene (0.95 equiv.) in THF (4.6 mL/g) at 0° C. is added isopropylmagnesium chloride (1.0 equiv, 20 weight percent in THF). After about 60 minutes at 0° C., a solution of 2-(allyloxy)-N-methoxy-N-methylacetamide (1.0 equiv.) (Volumes for this stage are in mL/g of this compound) in THF (2.2 mL/g) is added over about 60 minutes. The reaction mixture is quenched into a solution of NH4Cl (4.3 equiv.) in water (5.8 mL/g) at 0° C. Heptanes (7.2 mL/g) is added as the mixture is warmed to room temperature, and the layers are separated. The organic layer is washed with water (7.2 mL/g). The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF. The intermediate, 2-allyloxy-1-(5-bromo-2-fluoro-phenyl)ethanone is obtained as a solution in heptanes (approximately 20-25 weight %). is added over about 60 minutes the layers are separated The organic layer is washed with water (7.2 mL/g) The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF

反应条件: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 2-(allyloxy)-1-(5-bromo-2-fluorophenyl)ethanone (118 g, 432.1 mmol) in ethanol (1.7 L) is added hydroxylamine hydrochloride (34.5 g, 496.9 mmol) and sodium ethanoate (40.8 g, 496.9 mmol) at 25° C. The reaction is heated at 70° C. for 1 hr. The reaction is cooled and the solvent is removed under reduced pressure. The residue is washed with water (1 L) and is extracted three times with dichloromethane (3×500 mL). The organic phase is dried over magnesium sulfate, filtered, and the solvent is removed under reduced pressure, to obtain the title compound as a mixture of two possible oximes (120 g, 96%). ES/MS m/e (79Br/81Br) 288, 290 (M+1). The reaction is cooled the solvent is removed under reduced pressure The residue is washed with water (1 L) is extracted three times with dichloromethane (3×500 mL) The organic phase is dried over magnesium sulfate filtered the solvent is removed under reduced pressure

反应条件: temp:-72.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred −72° C. solution of 4-bromo-1-fluoro-2-iodobenzene (130.4 g, 433.5 mmol) in tetrahydrofuran (722 mL) is added 2.5 M butyl lithium in hexane (173.4 mL, 433.5 mmol) under a nitrogen atmosphere over 40 min. The reaction is stirred for 30 minutes at −72° C. and 2-(allyloxy)-N-methoxy-N-methylacetamide (57.5 g, 361.2 mmol) in tetrahydrofuran (115 mL) is added dropwise for 35 minutes. After 45 min at −72° C., the cooling bath is removed and mixture is warmed to 25° C. The reaction is quenched with saturated aqueous NH4Cl (500 mL), diluted with water (300 mL) and extracted three times with ethyl acetate. Organics are combined, dried over magnesium sulfate, filtered, and the solvent is removed under reduced pressure. The residue is purified by silica gel chromatography using a linear gradient of 5% to 10% ethyl acetate in hexanes to give the title compound (63 g, 64%). ES/MS m/e (79Br/81Br) 273/275 (M+1). After 45 min at −72° C. the cooling bath is removed mixture is warmed to 25° C The reaction is quenched with saturated aqueous NH4Cl (500 mL) diluted with water (300 mL) extracted three times with ethyl acetate dried over magnesium sulfate filtered the solvent is removed under reduced pressure The residue is purified by silica gel chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Scheme 1, steps C and D: To 4-bromo-1-fluoro-2-iodobenzene (0.95 equiv.) in THF (4.6 mL/g) at 0° C. is added isopropylmagnesium chloride (1.0 equiv, 20 weight percent in THF). After about 60 minutes at 0° C., a solution of 2-(allyloxy)-N-methoxy-N-methylacetamide (1.0 equiv.) (Volumes for this stage are in mL/g of this compound) in THF (2.2 mL/g) is added over about 60 minutes. The reaction mixture is quenched into a solution of NH4Cl (4.3 equiv.) in water (5.8 mL/g) at 0° C. Heptanes (7.2 mL/g) is added as the mixture is warmed to room temperature, and the layers are separated. The organic layer is washed with water (7.2 mL/g). The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF. The intermediate, 2-allyloxy-1-(5-bromo-2-fluoro-phenyl)ethanone is obtained as a solution in heptanes (approximately 20-25 weight %). is added over about 60 minutes the layers are separated The organic layer is washed with water (7.2 mL/g) The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Scheme 1, steps C and D: To 4-bromo-1-fluoro-2-iodobenzene (0.95 equiv.) in THF (4.6 mL/g) at 0° C. is added isopropylmagnesium chloride (1.0 equiv, 20 weight percent in THF). After about 60 minutes at 0° C., a solution of 2-(allyloxy)-N-methoxy-N-methylacetamide (1.0 equiv.) (Volumes for this stage are in mL/g of this compound) in THF (2.2 mL/g) is added over about 60 minutes. The reaction mixture is quenched into a solution of NH4Cl (4.3 equiv.) in water (5.8 mL/g) at 0° C. Heptanes (7.2 mL/g) is added as the mixture is warmed to room temperature, and the layers are separated. The organic layer is washed with water (7.2 mL/g). The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF. The intermediate, 2-allyloxy-1-(5-bromo-2-fluoro-phenyl)ethanone is obtained as a solution in heptanes (approximately 20-25 weight %). is added over about 60 minutes the layers are separated The organic layer is washed with water (7.2 mL/g) The organic layer is concentrated while additional heptanes (4 mL/g) is added to remove water and THF