2-bromo-3-chlorobenzaldehyde

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

Conditions: temp:22.01; 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: Under an argon atmosphere, zinc chloride (0.68 g, 4.97 mmol) was added to a 2.0 M solution of n-propyl magnesium chloride in diethyl ether (12.42 mL, 24.93 mmol), and the mixture was stirred at room temperature. After stirring for 0.5 hours, a solution of 2-bromo-3-chlorobenzaldehyde (4.36 g, 19.87 mmol), which had been obtained in Reference example 5(5b), in tetrahydrofuran (10 mL) was added dropwise thereto. After stirring for 2 hours under ice cooling, a saturated aqueous ammonium chloride solution (20 mL) was added thereto. The mixture obtained was extracted with ethyl acetate (20 mL×2). After that, the organic layers were washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1) to give the title compound as a white solid (3.23 g, yield 62%). After stirring for 0.5 hours was added dropwise After stirring for 2 hours under ice cooling The mixture obtained was extracted with ethyl acetate (20 mL×2) After that, the organic layers were washed with saturated brine dried over anhydrous sodium sulfate The solvent was distilled off under reduced pressure The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1)

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

Procedure: A solution of (2-bromo-3-chloro phenyl)methanol (4.73 g, 21.24 mmol), which had been obtained in Reference example 5(5a), in methylene chloride (120 mL) was added with 1,1,1-tris(acetoxy)-1,1-dihydro-1,2-benziodoxol-3-(1H)-one (10.8 g, 25.49 mmol) under ice cooling, and stirred at room temperature for 2 hours. The reaction solution was added with a mixture of saturated aqueous sodium hydrogen carbonate solution (60 mL) and saturated aqueous sodium thiosulfate solution (30 mL), and then stirred at room temperature for 0.5 hours. The mixture obtained was extracted with dichloromethane (90 mL×2). After that, the organic layers were combined and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1) to give the title compound as a white solid (4.36 g, yield 94%). stirred at room temperature for 0.5 hours The mixture obtained was extracted with dichloromethane (90 mL×2) dried over anhydrous sodium sulfate The solvent was distilled off under reduced pressure The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1)

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

Procedure: Under an argon atmosphere, zinc chloride (0.68 g, 4.97 mmol) was added to a 2.0 M solution of n-propyl magnesium chloride in diethyl ether (12.42 mL, 24.93 mmol), and the mixture was stirred at room temperature. After stirring for 0.5 hours, a solution of 2-bromo-3-chlorobenzaldehyde (4.36 g, 19.87 mmol), which had been obtained in Reference example 7 (7b), in tetrahydrofuran (10 mL) was added dropwise thereto. After stirring for 2 hours under ice cooling, a saturated aqueous ammonium chloride solution (20 mL) was added thereto. The mixture obtained was extracted with ethyl acetate (20 mL×2). After that, the organic layers were washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1) to give the title compound as a white solid (3.23 g, yield 62%). After stirring for 0.5 hours was added dropwise After stirring for 2 hours under ice cooling The mixture obtained was extracted with ethyl acetate (20 mL×2) After that, the organic layers were washed with saturated brine dried over anhydrous sodium sulfate The solvent was distilled off under reduced pressure The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1)

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

Procedure: A solution of (2-bromo-3-chloro phenyl)methanol (4.73 g, 21.24 mmol), which had been obtained in Reference example 7 (7a), in methylene chloride (120 mL) was added with 1,1,1-tris(acetoxy)-1,1-dihydro-1,2-benziodoxol-3-(1H)-one (10.8 g, 25.49 mmol) under ice cooling, and stirred at room temperature for 2 hours. The reaction solution was added with a mixture of saturated aqueous sodium hydrogen carbonate solution (60 mL) and saturated aqueous sodium thiosulfate solution (30 mL), and then stirred at room temperature for 0.5 hours. The mixture obtained was extracted with dichloromethane (90 mL×2). After that, the organic layers were combined and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1) to give the title compound as a white solid (4.36 g, yield 94%). stirred at room temperature for 0.5 hours The mixture obtained was extracted with dichloromethane (90 mL×2) dried over anhydrous sodium sulfate The solvent was distilled off under reduced pressure The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=5/1)

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