tert-butyl N-(2-fluoroethyl)-N-methylcarbamate

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

Procedure: To a solution of tert-butyl 2-fluoroethylcarbamate (4.1 g, 25.1 mmol) in THF (100 mL) at 0° C. was added sodium hydride, 60 wt % in mineral oil (1.507 g, 37.7 mmol) portion-wise. The reaction was stirred under N2 for 15 minutes after which gas evolution ceased. Iodomethane (2.356 mL, 37.7 mmol) was added drop-wise and the reaction stirred under N2. After 6 h, the reaction was quenched with water (100 mL) and concentrated. The aqueous solution was washed with CH2Cl2 (3×50 mL). The CH2Cl2 extracts were combined, washed with water (2×100 mL), dried (MgSO4) and concentrated to afford the title compound (4.0 g, 90% yield) as a clear oil. 1H NMR (400 MHz, CDCl3) δ: 4.58 (1H, brs), 4.47 (1 H, brs), 3.53 (1 H, brs), 3.47 (1 H, brs), 2.94 (3 H, s), 1.45 (9 H, s). the reaction stirred under N2 After 6 h the reaction was quenched with water (100 mL) concentrated The aqueous solution was washed with CH2Cl2 (3×50 mL) washed with water (2×100 mL) dried (MgSO4) concentrated

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

Procedure: Under nitrogen atmosphere, tert-butyl (2-fluoroethyl)carbamate (I-286) (2 g, 20.1 mmol) was dissolved in N,N-dimethylformamide (50 ml), then sodium hydride (55%, w/w) (803 mg, 18.4 mmol) was added to the solution at 0° C., followed by stirring at 0° C. for 30 minutes. After 30 minutes, iodomethane (1.2 ml, 19.7 mmol) was added, followed by stirring at room temperature for 19 hours. Ethyl acetate was added to the reaction liquid, followed by washing with saturated brine. The organic layer was dried over anhydrous magnesium sulfate, then the solvent was evaporated away under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent, n-hexane:ethyl acetate=3:1, v/V) to obtain the entitled compound (970 mg, 45%) as a white crystal. After 30 minutes by stirring at room temperature for 19 hours by washing with saturated brine The organic layer was dried over anhydrous magnesium sulfate the solvent was evaporated away under reduced pressure The resulting residue was purified by silica gel column chromatography (eluent, n-hexane

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

Procedure: Under nitrogen atmosphere, tert-butyl (2-fluoroethyl)carbamate (I-286) (2 g, 20.1 mmol) was dissolved in N,N-dimethylformamide (50 ml), then sodium hydride (55%, w/w) (803 mg, 18.4 mmol) was added to the solution at 0° C., followed by stirring at 0° C. for 30 minutes. After 30 minutes, iodomethane (1.2 ml, 19.7 mmol) was added, followed by stirring at room temperature for 19 hours. Ethyl acetate was added to the reaction liquid, followed by washing with saturated brine. The organic layer was dried over anhydrous magnesium sulfate, then the solvent was evaporated away under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent, n-hexane:ethyl acetate=3:1, v/V) to obtain the entitled compound (970 mg, 45%) as a white crystal. After 30 minutes by stirring at room temperature for 19 hours by washing with saturated brine The organic layer was dried over anhydrous magnesium sulfate the solvent was evaporated away under reduced pressure The resulting residue was purified by silica gel column chromatography (eluent, n-hexane

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

Procedure: To a solution of tert-butyl 2-fluoroethylcarbamate (4.1 g, 25.1 mmol) in THF (100 mL) at 0° C. was added sodium hydride, 60 wt % in mineral oil (1.507 g, 37.7 mmol) portion-wise. The reaction was stirred under N2 for 15 minutes after which gas evolution ceased. Iodomethane (2.356 mL, 37.7 mmol) was added drop-wise and the reaction stirred under N2. After 6 h, the reaction was quenched with water (100 mL) and concentrated. The aqueous solution was washed with CH2Cl2 (3×50 mL). The CH2Cl2 extracts were combined, washed with water (2×100 mL), dried (MgSO4) and concentrated to afford the title compound (4.0 g, 90% yield) as a clear oil. 1H NMR (400 MHz, CDCl3) δ: 4.58 (1H, brs), 4.47 (1 H, brs), 3.53 (1 H, brs), 3.47 (1 H, brs), 2.94 (3 H, s), 1.45 (9 H, s). the reaction stirred under N2 After 6 h the reaction was quenched with water (100 mL) concentrated The aqueous solution was washed with CH2Cl2 (3×50 mL) washed with water (2×100 mL) dried (MgSO4) concentrated

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

Procedure: Under nitrogen atmosphere, tert-butyl (2-fluoroethyl)carbamate (I-286) (2 g, 20.1 mmol) was dissolved in N,N-dimethylformamide (50 ml), then sodium hydride (55%, w/w) (803 mg, 18.4 mmol) was added to the solution at 0° C., followed by stirring at 0° C. for 30 minutes. After 30 minutes, iodomethane (1.2 ml, 19.7 mmol) was added, followed by stirring at room temperature for 19 hours. Ethyl acetate was added to the reaction liquid, followed by washing with saturated brine. The organic layer was dried over anhydrous magnesium sulfate, then the solvent was evaporated away under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent, n-hexane:ethyl acetate=3:1, v/V) to obtain the entitled compound (970 mg, 45%) as a white crystal. After 30 minutes by stirring at room temperature for 19 hours by washing with saturated brine The organic layer was dried over anhydrous magnesium sulfate the solvent was evaporated away under reduced pressure The resulting residue was purified by silica gel column chromatography (eluent, n-hexane