1-(3-fluorophenyl)ethanone

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

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

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

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

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

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

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

Procedure: 1-(3-Fluorophenyl)ethanone (17 g, 0.123 mol), dimethylamine (13.7 g, 0.172 mol), and paraformaldehyde (5.5 g, 0.185 mol) were suspended in ethanol (50 mL), and conc HCl solution (0.3 mL) was added. The mixture was heated at reflux overnight. The solvent was removed under vacuum, and the residue was washed with EtOAc (3×) to give 3-(dimethylamino)-1-(3-fluorophenyl)propan-1-one (20.7 g, 88%), which was used for the next step without purification. The mixture was heated at reflux overnight The solvent was removed under vacuum the residue was washed with EtOAc (3×)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3-fluoro-N-methoxy-N-methylbenzamide (16 g, 87.4 mmol) in THF (150 mL) was cooled to −78° C. Vinylmagnesium bromide (120 mL, 120 mmol) was added slowly. The mixture was stirred at −78° C. for 10 min, at rt for 3 h, and quenched by addition of 1 N aq HCl (100 mL) at 0° C. The aqueous layer was extracted with EtOAc (100 mL). The combined organic phase was washed with brine (50 mL), dried over Na2SO4, and concentrated. The residue was purified by column chromatography to afford 1-(3-fluorophenyl)ethanone (9.7 g, yield: 75%) as a colorless oil. quenched by addition of 1 N aq HCl (100 mL) at 0° C The aqueous layer was extracted with EtOAc (100 mL) The combined organic phase was washed with brine (50 mL) dried over Na2SO4 concentrated The residue was purified by column chromatography

Conditions: temp:42.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A reaction vessel was charged with 2-chloro-5-trifluoromethylpyridine (8 g, 44 mmol), 3-fluoroacetophenone (6.4 g, 46 mmol) and DME (56 ml). Sodium hydride (as a 60% oil dispersion, 5.8 g, 145 mmol) was added in portions to the mixture under nitrogen at room temperature. The mixture was stirred at 40-45° C. overnight. Upon the completion of the reaction, aqueous NH4Cl solution (240 ml) was added to the reaction mixture at room temperature. The mixture was stirred for 0.5 hr and filtered. The cake was washed with water, slurried in hexanes (32 ml) and dried in a vacuum oven to give 10.44 g (84%) of the title compound (a mixture of ketone and enol isomers) as a solid with purity 99% AUC by HPLC (Phenomenex Luna 3μ cyano, 100 mm×4.6 mm. Flow rate: 1 ml/min. UV detection: 220 nm. Eluent: 75% A, 25% B. A: 80/20/0.05 water/acetonitrile/TFA. B: 20/80/0.05 water/acetonitrile/TFA ). was added to the reaction mixture at room temperature The mixture was stirred for 0.5 hr filtered The cake was washed with water dried in a vacuum oven

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

Procedure: A mixture of 3-fluorobenzaldehyde (7.63 mL, 72.4 mmol), 3-fluoroacetophenone (10 g, 72.4 mmol), potassium hydroxide (5.18 g, 92.6 mmol), ethanol (23 mL) and water (47 mL) was stirred overnight at room temperature. After the reaction solution was diluted with water, the solid was collected by filtration and washed with ethanol and diethyl ether, to give the title compound (16.4 g, 93%). the solid was collected by filtration washed with ethanol and diethyl ether

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

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

Procedure: 1-(3-Fluorophenyl)ethanone (17 g, 0.123 mol), dimethylamine (13.7 g, 0.172 mol), and paraformaldephyde (5.5 g, 0.185 mol) were suspended in ethanol (50 mL), and conc HCl solution (0.3 mL) was added. The mixture was heated at reflux overnight. The solvent was removed under vacuum, and the residue was washed with EtOAc (3×) to give 3-(dimethylamino)-1-(3-fluorophenyl)propan-1-one (20.7 g, 88%), which was used for the next step without purification. The mixture was heated at reflux overnight The solvent was removed under vacuum the residue was washed with EtOAc (3×)