5-fluoro-2-methoxybenzaldehyde

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: 7-amino-5-(5-fluoro-2-methoxyphenyl)-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile (70a) was prepared by the reaction of 5-fluoro-2-methoxybenzaldehyde and 6-amino-1,3-dimethylpyrimidine-2,4(1H,3H)-dione, according to procedures described in the synthesis of Compound 56. MS [m+H] calc'd C17H15FN5O3 356; found 356.

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

Procedure: To a stirred solution of 5-fluoro-2-methoxybenzaldehyde (933 mg, 6.05 mmol) in anhydrous THF (15 mL) at 0° C. was added phenylethynyl magnesium bromide solution (1M in THF, 9.0 mL, 9.08 mmol). The temperature was allowed to increase to RT over the course of the reaction. After 18 h, the reaction mixture was quenched with saturated aqueous ammonium chloride solution and extracted with EtOAc (20 mL). The organic extracts were washed with brine, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 30% EtOAc in cyclohexane) to afford the title compound (1.19 g, 77%). 1H NMR (400 MHz, DMSO-d6): δ 7.42-7.32 (m, 6H), 7.16-7.09 (m, 1H), 7.06-7.02 (m, 1H), 6.16-6.13 (d, 1H), 5.78-5.75 (d, 1H), 3.83 (s, 3H). the reaction mixture was quenched with saturated aqueous ammonium chloride solution extracted with EtOAc (20 mL) The organic extracts were washed with brine dried (Na2SO4) filtered concentrated in vacuo

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

Procedure: To a solution of 2-Methoxy-5-fluorobenzaldehyde (11.093 g, 1 equiv.-available from Aldrich Chemical Company) in methanol at −10° C. under nitrogen atmosphere was added NaBH4 (7.515 g, 2.7 equiv.) portionwise. The solution was allowed to warm to room temperature and after 30 minutes the reaction solvent was removed under reduced pressure and replaced with dichloromethane. This solution was poured onto ice water and further extracted with dichloromethane. The organic fractions were collected and dried (MgSO4) and the solvent removed under reduced pressure to give the title compound as an oil (9.794 g, 87%). 1H NMR (300 MHz, CDCl3): δ 2.58 (m, 1H), 3.81 (s, 3H), 4.63 (d, 2H, J=6.3 Hz), 6.78 (dd, 1H, J=8.9 and 4.3 Hz), 6.94 (td, 1H, J=8.5 and 3.1 Hz), 7.04 (dd, 1H, J=8.7 and 3.1 Hz). was removed under reduced pressure This solution was poured onto ice water further extracted with dichloromethane The organic fractions were collected dried (MgSO4) the solvent removed under reduced pressure

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

Procedure: Add Sodium borohydride (540 mg, 13.95 mmol) in portions to a solution of 5-Fluoro-2-methoxy-benzaldehyde (2.15 g, 13.94 mmol) in absolute EtOH (20 ml) and stir at room temperature. After 1 h, evaporate the solvent, dilute the residue in CH2Cl2 and treat with aqueous 3M HCl. Separate the phases, wash the organic one twice with H2O, dry over Na2SO4 and concentrate at vacuum to obtain pure (5-Fluoro-2-methoxy-phenyl)-methanol as white solid. Add aqueous concentrated HBr (15 ml) to a solution of (5-Fluoro-2-methoxy-phenyl)-methanol (1.9 g, 12.17 mmol) in CHCl3 (10 ml) and stir at room temperature. After 1 h, separate the phases, wash the aqueous one with CH2Cl2, combine organic phases, wash with H2O, dry over Na2SO4 and concentrate at vacuum to obtain a residue. Purify the residue by column chromatography on silica gel eluting with hexane to afford 2-Bromomethyl-4-fluoro-1-methoxy-benzene as white solid. 1H-NMR (CDCl3, 200 Mz): δ 7.06 (dd, J=3.0 and 8.6 Hz, 1H), 6.98 (m, 1H), 6.81 (dd, J=4.4 and 9.0 Hz, 1H), 4.50 (s, 2H), 3.87 (s, 3H). evaporate the solvent dilute the residue in CH2Cl2 treat with aqueous 3M HCl Separate the phases wash the organic one twice with H2O dry over Na2SO4 concentrate at vacuum

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

Procedure: To a solution of 5-fluoro-2-methoxybenzaldehyde (1 g) in acetone (4 mL) was added a solution of potassium permanganate (1.54 g) in water (16 mL), and the mixture was heated for reflux for 4 hours. The reaction mixture was cooled to room temperature. To the mixture was added 2 mol/L aqueous sodium hydroxide solution (5.2 mL), and the insoluble material was removed by filtration. The filtrate was washed with ethyl acetate. The aqueous layer was acidified by addition of 2 mol/L hydrochloric acid, and the mixture was extracted with ethyl acetate twice. The extracts were combined and washed with brine, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1−ethyl acetate) to give 5-fluoro-2-methoxybenzoic acid (0.66 g). This material was dissolved in N,N-dimethylformamide (15 mL). To the solution were added potassium carbonate (0.63 g) and iodomethane (0.26 mL), and the mixture was stirred at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate, and the resulting mixture was washed with water and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure to give methyl 5-fluoro-2-methoxybenzoate (0.7 g). This material was dissolved in tetrahydrofuran (10 mL). To the solution was added methylmagnesium iodide (3.0 mol/L diethyl ether solution, 3.82 mL) under ice-cooling, and the mixture was stirred at room temperature for 2 hours. To the reaction mixture was added a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane−n-hexane/ethyl acetate=1/1) to give the title compound (0.65 g). the mixture was heated for reflux for 4 hours the insoluble material was removed by filtration The filtrate was washed with ethyl acetate The aqueous layer was acidified by addition of 2 mol/L hydrochloric acid the mixture was extracted with ethyl acetate twice washed with brine dried over anhydrous magnesium sulfate The solvent was removed under reduced pressure the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1−ethyl acetate)

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

Procedure: To a solution of 5-fluoro-2-methoxybenzaldehyde (1 g) in acetone (4 mL) was added a solution of potassium permanganate (1.54 g) in water (16 mL), and the mixture was heated for reflux for 4 hours. The reaction mixture was cooled to room temperature. To the mixture was added 2 mol/L aqueous sodium hydroxide solution (5.2 mL), and the insoluble material was removed by filtration. The filtrate was washed with ethyl acetate. The aqueous layer was acidified by addition of 2 mol/L hydrochloric acid, and the mixture was extracted with ethyl acetate twice. The extracts were combined and washed with brine, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1−ethyl acetate) to give 5-fluoro-2-methoxybenzoic acid (0.66 g). This material was dissolved in N,N-dimethylformamide (15 mL). To the solution were added potassium carbonate (0.63 g) and iodomethane (0.26 mL), and the mixture was stirred at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate, and the resulting mixture was washed with water and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure to give methyl 5-fluoro-2-methoxybenzoate (0.7 g). This material was dissolved in tetrahydrofuran (10 mL). To the solution was added methylmagnesium iodide (3.0 mol/L diethyl ether solution, 3.82 mL) under ice-cooling, and the mixture was stirred at room temperature for 2 hours. To the reaction mixture was added a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with ethyl acetate. The extract was washed with water and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane−n-hexane/ethyl acetate=1/1) to give the title compound (0.65 g). the mixture was heated for reflux for 4 hours the insoluble material was removed by filtration The filtrate was washed with ethyl acetate The aqueous layer was acidified by addition of 2 mol/L hydrochloric acid the mixture was extracted with ethyl acetate twice washed with brine dried over anhydrous magnesium sulfate The solvent was removed under reduced pressure the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1−ethyl acetate)