methyl 3-(3-bromo-4-fluorophenyl)-3-oxopropanoate

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 mmol) and 3′-bromo-4′-fluoroacetophenone (3.0 g, 13.8 mmol).

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 inmol) and 3'-bromo-4'-fluoroacetophenone (3.0 g, 13.8 mmol). The resulting suspension was stirred at 65° C. for 1 h and then was cooled to room temperature. The reaction mixture was diluted with ethyl acetate and washed with water and brine, dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate) to afford 1.0 g (26%) of the title compound. 1H NMR (CDCl3) (data for keto tautomer) δ8.15 (dd, 1H), 7.87 (m, 1H), 7.2 (m, 1H), 3.95 (s, 2H), 3.73 (s, 3H). was cooled to room temperature washed with water and brine dried (MgSO4) concentrated in vacuo The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate)

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 mmol) and 3′-bromo-4′-fluoroacetophenone (3.0 g, 13.8 mmol).

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 mmol) and 3′-bromo-4′-fluoroacetophenone (3.0 g, 13.8 mmol).

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 suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 mmol) and 3′-bromo-4′-fluoroacetophenone (3.0 g, 13.8 mmol). The resulting suspension was stirred at 65° C. for 1 h and then was cooled to room temperature. The reaction mixture was diluted with ethyl acetate and washed with water and brine, dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate) to afford 1.0 g (26%) of the title compound. 1H NMR (CDCl3) (data for keto tautomer) δ8.15 (dd, 1H), 7.87 (m, 1H), 7.2 (m, 1H), 3.95 (s, 2H), 3.73 (s, 3H). was cooled to room temperature washed with water and brine dried (MgSO4) concentrated in vacuo The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate)

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 inmol) and 3'-bromo-4'-fluoroacetophenone (3.0 g, 13.8 mmol). The resulting suspension was stirred at 65° C. for 1 h and then was cooled to room temperature. The reaction mixture was diluted with ethyl acetate and washed with water and brine, dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate) to afford 1.0 g (26%) of the title compound. 1H NMR (CDCl3) (data for keto tautomer) δ8.15 (dd, 1H), 7.87 (m, 1H), 7.2 (m, 1H), 3.95 (s, 2H), 3.73 (s, 3H). was cooled to room temperature washed with water and brine dried (MgSO4) concentrated in vacuo The residue was purified by flash chromatography (elution with 3:1 hexane/ethyl acetate)

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

実験手順: To a suspension of sodium hydride (1.1 g of 60% suspension in mineral oil, hexane-washed, 27.6 mmol) in 50 mL of tetrahydrofuran was added dimethyl carbonate (2.3 mL, 27.6 mmol) and 3′-bromo-4′-fluoroacetophenone (3.0 g, 13.8 mmol).

反応条件: temp:0.00; pressure:0.00; stir: