1-bromo-2-fluoro-4-iodobenzene

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:

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:

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: A stirred suspension of 1-bromo-2-fluoro-4-iodobenzene (100 g, 332 mmol), NiBr2 (7.26 g, 33.2 mmol), 2,2-dipyridyl (5.19 g, 33.2 mmol) and zinc dust (27.2 g, 415 mmol) in DMF (600 mL) was treated with MeS—SMe (15.65 g, 166 mmol), and the mixture was heated in a sand bath set for 80° C. After 10 min (color changes to black and reaction was complete according to HPLC analysis), the mixture was poured onto water. 1N HCl (100 mL) was added along with Et2O (300 mL), and the suspension was filtered through a glass fritted funnel. The zinc plug was further washed with Et2O and the Et2O layer was separated and the aqueous layer was extracted with Et2O (3×). The organic extracts were then dried over Na2SO4 and the solvent evaporated (note that the product is very volatile) to afford 1-bromo-2-fluoro-4-(methylthio)benzene (180 g), which was used without further purification. 1H NMR (400 MHz, CDCl3): δ 7.43-7.38 (m, 1H), 6.97 (dd, 1H, Ja=9.1 Hz, Jb=2.0 Hz), 6.90-6.86 (m, 1H), 2.46 (s, 3H). the mixture was heated in a sand bath set for 80° C After 10 min (color changes to black and reaction was complete according to HPLC analysis) the mixture was poured onto water the suspension was filtered through a glass fritted funnel The zinc plug was further washed with Et2O the Et2O layer was separated the aqueous layer was extracted with Et2O (3×) The organic extracts were then dried over Na2SO4 the solvent evaporated (note that the product

反応条件: temp:-40.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 1-bromo-2-fluoro-4-iodobenzene (2390 mg, 7.90 mmol) in tetrahydrofuran (20 mL) at −40° C. was added isopropyl magnesium chloride.lithium chloride (1.3M in THF, 6.4 mL, 5.1 mmol) dropwise. The reaction mixture was stirred at −40° C. for 10 minutes, and treated with additional isopropyl magnesium chloride.lithium chloride (1.3M in THF, 1 mL, 1.3 mmol). The reaction mixture was stirred at −40° C. for an additional 20 minutes and then treated with cyclobutanone (624 mg, 8.72 mmol) dropwise at −40° C. The reaction mixture was warmed to room temperature, and stirred at room temperature for 16 hours. The reaction mixture was quenched with water and extracted with ethyl acetate (3×240 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo to afford the title compound (1.7 g, 91%) as an oil. The reaction mixture was stirred at −40° C. for an additional 20 minutes The reaction mixture was warmed to room temperature stirred at room temperature for 16 hours The reaction mixture was quenched with water extracted with ethyl acetate (3×240 mL) The combined organic layers were dried over sodium sulfate filtered concentrated in vacuo

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