3-propan-2-yl-1-benzofuran

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

実験手順: To a cooled (0° C.) solution of 3-isopropylbenzofuran (250 mg, 1.56 mmol) in THF (1 mL) is added nBuLi (2 mL, 2 mmol) drop wise and the reaction is stirred for 30 minutes. DMF (1 mL) was added to the reaction and stirred at room temperature overnight. The solution is placed in an ice bath and carefully quenched with 5% aqueous 110 solution (2 mL), and extracted with ethyl acetate (3×5 mL), dried over sodium sulfate and concentrated. The product was purified on silica with 100% hexanes to yield title compound in as a colorless oil (250 mg, 85%): 1H NMR (400 MHz, CDCl3) δ 10.10 (s, 1H), 7.78 (d, 1H, J=9.0 Hz), 7.55 (d, 1H, J=9.0 Hz), 7.32-7.24 (m, 2H), 3.11-3.07 (m, 1H), 1.33-1.31 (2s, 6H). stirred at room temperature overnight The solution is placed in an ice bath carefully quenched with 5% aqueous 110 solution (2 mL) extracted with ethyl acetate (3×5 mL) dried over sodium sulfate concentrated The product was purified on silica with 100% hexanes

反応条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 1-iodo-2-(3-methylbut-2-enyloxy)benzene (5 g, 17.3 mmol) in propionitrile (10 mL) and diisopropylethylamine (9 mL, 52 mmol) is degassed with argon for 15 min. To this solution is added palladium acetate (423 mg, 1.73 mmol) and the reaction is heated to 100° C. overnight. The reaction is then cooled to room temperature and passed through a pad of celite, washing the filter cake with ethyl acetate (50 mL). The ethyl acetate and amine base are then removed under vacuum. The crude reaction mixture is then chromatographed using 100% hexanes to yield title compound as a colorless oil in 52% yield (1.3 g): 1H NMR (300 MHz, CDCl3) δ 7.7 (s, 1H), 7.68 (d, J=9.0 Hz, 1H), 7.55 (d, J=9.0 Hz, 1H), 7.32-7.24 (m, 2H), 3.11-3.07 (m, 1H), 1.32 (2s, 6H). The reaction is then cooled to room temperature washing the filter cake with ethyl acetate (50 mL) The ethyl acetate and amine base are then removed under vacuum The crude reaction mixture is then chromatographed

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

実験手順: To a cooled (0° C.) solution of 3-isopropylbenzofuran (250 mg, 1.56 mmol) in THF (1 mL) is added nBuLi (2 mL, 2 mmol) drop wise and the reaction is stirred for 30 minutes. DMF (1 mL) was added to the reaction and stirred at room temperature overnight. The solution is placed in an ice bath and carefully quenched with 5% aqueous HCl solution (2 mL), and extracted with ethyl acetate (3×5 mL), dried over sodium sulfate and concentrated. The product was purified on silica with 100% hexanes to yield title compound in as a colorless oil (250 mg, 85%): 1H NMR (400 MHz, CDCl3) δ 10.10 (s, 1H), 7.78 (d, 1H, J=9.0 Hz), 7.55 (d, 1H, J=9.0 Hz), 7.32-7.24 (m, 2H), 3.11-3.07 (m, 1H), 1.33-1.31 (2s, 6H). stirred at room temperature overnight The solution is placed in an ice bath carefully quenched with 5% aqueous HCl solution (2 mL) extracted with ethyl acetate (3×5 mL) dried over sodium sulfate concentrated The product was purified on silica with 100% hexanes

反応条件: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 1-iodo-2-(3-methylbut-2-enyloxy)benzene (5 g, 17.3 mmol) in propionitrile (10 mL) and diisopropylethylamine (9 mL, 52 mmol) is degassed with argon for 15 min. To this solution is added palladium acetate (423 mg, 1.73 mmol) and the reaction is heated to 100° C. overnight. The reaction is then cooled to room temperature and passed through a pad of celite, washing the filter cake with ethyl acetate (50 mL). The ethyl acetate and amine base are then removed under vacuum. The crude reaction mixture is then chromatographed using 100% hexanes to yield title compound as a colorless oil in 52% yield (1.3 g): 1H NMR (300 MHz, CDCl3) δ 7.7 (s, 1H), 7.68 (d, J=9.0 Hz, 1H,), 7.55 (d, J=9.0 Hz, 1H), 7.32-7.24 (m, 2H), 3.11-3.07 (m, 1H), 1.32 (2s, 6H). The reaction is then cooled to room temperature washing the filter cake with ethyl acetate (50 mL) The ethyl acetate and amine base are then removed under vacuum The crude reaction mixture is then chromatographed