2-FLUORO-4-IODOBENZALDEHYDE

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

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

Procedure: To a solution of 2-fluoro-4-iodo-benzaldehyde (17.40 g, 69.60 mmol) in anhydrous tetrahydrofuran (300 mL) at −10° C. under an atmosphere of nitrogen was added 3.0 M methylmagnesium chloride in tetrahydrofuran (27.84 mL, 83.52 mmol) via syringe at such a rate as to maintain the temperature of the reaction mixture below 0° C. The reaction was stirred for 30 minutes while warming to room temperature. Saturated aqueous ammonium chloride solution was added and the mixture was diluted with ethyl acetate (200 mL). The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×50 mL). The organic extracts were combined, washed with water (1×50 mL), brine, dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes to give 1-(2-fluoro-4-iodo-phenyl)-ethanol (15.50 g, 84%). to maintain the temperature of the reaction mixture below 0° C The organic layer was separated the aqueous layer was extracted with ethyl acetate (2×50 mL) washed with water (1×50 mL), brine dried over sodium sulfate filtered concentrated in vacuo The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes

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

Procedure: To a solution of 2-fluoro-4-iodo-benzaldehyde (17.40 g, 69.60 mmol) in anhydrous tetrahydrofuran (300 mL) at −10° C. under an atmosphere of nitrogen was added 3.0 M methylmagnesium chloride in tetrahydrofuran (27.84 mL, 83.52 mmol) via syringe at such a rate as to maintain the temperature of the reaction mixture below 0° C. The reaction was stirred for 30 minutes while warming to room temperature. Saturated aqueous ammonium chloride solution was added and the mixture was diluted with ethyl acetate (200 mL). The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×50 mL). The organic extracts were combined, washed with water (1×50 mL), brine, dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes to give 1-(2-fluoro-4-iodo-phenyl)-ethanol (15.50 g, 84%). to maintain the temperature of the reaction mixture below 0° C The organic layer was separated the aqueous layer was extracted with ethyl acetate (2×50 mL) washed with water (1×50 mL), brine dried over sodium sulfate filtered concentrated in vacuo The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes

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

Procedure: A solution of 2-fluoro-1,4-diiodo-benzene (804 mg, 2.31 mmol) in tetrahydrofuran (8 mL) was cooled to −78° C. (external) and a 2.0 M solution of isopropylmagnesium chloride in tetrahydrofuran (1.44 mL, 2.89 mmol) added via syringe. The resulting mixture was stirred for 30 minutes while allowing the temperature of the cooling bath to rise to −50° C. The reaction mixture was then immersed in an ice/water bath and anhydrous N,N-dimethylformamide (425 μL, 5.78 mmol) was added by syringe to the reaction mixture. The reaction was stirred at 0° C. for 10 minutes, then at room temperature for 5 minutes. Thin layer chromatography (TLC) indicated the reaction to be complete. The mixture was diluted with saturated aqueous ammonium chloride solution (8 mL) and extracted with diethylether (2×20 mL). The combined organic layers were dried over sodium sulfate and concentrated in vacuo. The resulting residue was purified by chromatography over silica gel gradient eluted with 0 to 15% v/v ethyl acetate/hexanes to give 2-fluoro-4-iodo-benzaldehyde as a fluffy-white solid (389 mg, 67%). to rise to −50° C The reaction mixture was then immersed in an ice/water bath The reaction was stirred at 0° C. for 10 minutes at room temperature for 5 minutes the reaction extracted with diethylether (2×20 mL) The combined organic layers were dried over sodium sulfate concentrated in vacuo The resulting residue was purified by chromatography over silica gel gradient eluted with 0 to 15% v/v ethyl acetate/hexanes

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

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

Procedure: To a solution of 2-fluoro-4-iodo-benzaldehyde (17.40 g, 69.60 mmol) in anhydrous tetrahydrofuran (300 mL) at −10° C. under an atmosphere of nitrogen was added 3.0 M methylmagnesium chloride in tetrahydrofuran (27.84 mL, 83.52 mmol) via syringe at such a rate as to maintain the temperature of the reaction mixture below 0° C. The reaction was stirred for 30 minutes while warming to room temperature. Saturated aqueous ammonium chloride solution was added and the mixture was diluted with ethyl acetate (200 mL). The organic layer was separated and the aqueous layer was extracted with ethyl acetate (2×50 mL). The organic extracts were combined, washed with water (1×50 mL), brine, dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes to give 1-(2-fluoro-4-iodo-phenyl)-ethanol (15.50 g, 84%). to maintain the temperature of the reaction mixture below 0° C The organic layer was separated the aqueous layer was extracted with ethyl acetate (2×50 mL) washed with water (1×50 mL), brine dried over sodium sulfate filtered concentrated in vacuo The crude product was purified by chromatography over silica gel gradient eluted with 15 to 40% v/v ethyl acetate/hexanes

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

Procedure: A solution of 2-fluoro-1,4-diiodo-benzene (804 mg, 2.31 mmol) in tetrahydrofuran (8 mL) was cooled to −78° C. (external) and a 2.0 M solution of isopropylmagnesium chloride in tetrahydrofuran (1.44 mL, 2.89 mmol) added via syringe. The resulting mixture was stirred for 30 minutes while allowing the temperature of the cooling bath to rise to −50° C. The reaction mixture was then immersed in an ice/water bath and anhydrous N,N-dimethylformamide (425 μL, 5.78 mmol) was added by syringe to the reaction mixture. The reaction was stirred at 0° C. for 10 minutes, then at room temperature for 5 minutes. Thin layer chromatography (TLC) indicated the reaction to be complete. The mixture was diluted with saturated aqueous ammonium chloride solution (8 mL) and extracted with diethylether (2×20 mL). The combined organic layers were dried over sodium sulfate and concentrated in vacuo. The resulting residue was purified by chromatography over silica gel gradient eluted with 0 to 15% v/v ethyl acetate/hexanes to give 2-fluoro-4-iodo-benzaldehyde as a fluffy-white solid (389 mg, 67%). to rise to −50° C The reaction mixture was then immersed in an ice/water bath The reaction was stirred at 0° C. for 10 minutes at room temperature for 5 minutes the reaction extracted with diethylether (2×20 mL) The combined organic layers were dried over sodium sulfate concentrated in vacuo The resulting residue was purified by chromatography over silica gel gradient eluted with 0 to 15% v/v ethyl acetate/hexanes