1-(bromomethyl)-4-ethylbenzene

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 mixture of 4-ethylbenzyl alcohol (2.72 g, 20 mmol, purchased from Aldrich) and 50 ml of 47% hydrobromic acid (purchased from Wako Junyaku Kogyo) was stirred vigorously for 30 minutes at room temperature. The reaction mixture was extracted with hexane to give 3.98 g of 4-ethylbenzyl bromide as a colorless oil. Then to a hot solution (50° C.) of sodium cyanide (1.96 g, 40 mmol) in 20 ml of dimethyl sulfoxide was added the above 3.98 g of 4-ethylbenzyl bromide and the mixture was stirred for 3 hours at ambient temperature. To the resultant reaction mass was added water and extracted with hexane. The solvent was removed to give 2.70 g (yield: 93.1%) of 4-ethylphenylacetonitrile as a pale yellow oil. To the resultant reaction mass extracted with hexane The solvent was removed

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

実験手順: A mixture of 4-ethylbenzyl alcohol (2.72 g, 20 mmol, purchased from Aldrich) and 50 ml of 47% hydrobromic acid (purchased from Wako Junyaku Kogyo) was stirred vigorously for 30 minutes at room temperature. The reaction mixture was extracted with hexane to give 3.98 g of 4-ethylbenzyl bromide as a colorless oil. Then to a hot solution (50° C.) of sodium cyanide (1.96 g, 40 mmol) in 20 ml of dimethyl sulfoxide was added the above 3.98 g of 4-ethylbenzyl bromide and the mixture was stirred for 3 hours at ambient temperature. To the resultant reaction mass was added water and extracted with hexane. The solvent was removed to give 2.70 g (yield: 93.1%) of 4-ethylphenylacetonitrile as a pale yellow oil. The reaction mixture was extracted with hexane

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

実験手順: A mixture of 4-ethylbenzyl alcohol (2.72 g, 20 mmol, purchased from Aldrich) and 50 ml of 47% hydrobromic acid (purchased from Wako Junyaku Kogyo) was stirred vigorously for 30 minutes at room temperature. The reaction mixture was extracted with hexane to give 3.98 g of 4-ethylbenzyl bromide as a colorless oil. Then to a hot solution (50° C.) of sodium cyanide (1.96 g, 40 mmol) in 20 ml of dimethyl sulfoxide was added the above 3.98 g of 4-ethylbenzyl bromide and the mixture was stirred for 3 hours at ambient temperature. To the resultant reaction mass was added water and extracted with hexane. The solvent was removed to give 2.70 g (yield: 93.1%) of 4-ethylphenylacetonitrile as a pale yellow oil. The reaction mixture was extracted with hexane

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 35 ml of a 33% solution of HBr in AcOH are cooled to 0° C., 5 g of 4-ethylbenzyl alcohol are added dropwise and the reaction mixture is stirred for 30 minutes at 0° C. and then overnight at RT. It is poured into 200 ml of iced water, the mixture is extracted with AcOEt, the organic phase is washed with saturated aqueous NaHCO3 solution and with saturated NaCl solution, dried over Na2SO4 and the solvent is evaporated off under vacuum to give 5.6 g of the expected product. overnight at RT the mixture is extracted with AcOEt the organic phase is washed with saturated aqueous NaHCO3 solution and with saturated NaCl solution dried over Na2SO4 the solvent is evaporated off under vacuum

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 35 ml of a 33% solution of HBr in AcOH are cooled to 0° C., 5 g of 4-ethylbenzyl alcohol are added dropwise and the reaction mixture is stirred for 30 minutes at 0° C. and then overnight at RT. It is poured into 200 ml of iced water, the mixture is extracted with AcOEt, the organic phase is washed with saturated aqueous NaHCO3 solution and with saturated NaCl solution, dried over Na2SO4 and the solvent is evaporated off under vacuum to give 5.6 g of the expected product. overnight at RT the mixture is extracted with AcOEt the organic phase is washed with saturated aqueous NaHCO3 solution and with saturated NaCl solution dried over Na2SO4 the solvent is evaporated off under vacuum

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

実験手順: 5-Bromo-1H-pyridin-2-one (1.04 g) and 4-ethylbenzyl bromide (1.43 g) were dissolved in N,N-dimethylformamide (15 ml), and thereto was added potassium carbonate (1.66 g). The mixture was stirred at room temperature overnight, diluted with ethyl acetate, and washed successively with water and brine. The extract was dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1-3:1) to give 5-bromo-1-(4-ethylphenylmethyl)-1H-pyridin-2-one (1.58 g) as colorless crystals. APCI-Mass m/Z 292/294 (M+H). washed successively with water and brine The extract was dried over magnesium sulfate the solvent was evaporated under reduced pressure The residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1-3:1)

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

実験手順: 5-Bromo-1H-pyridin-2-one (1.04 g) and 4-ethylbenzyl bromide (1.43 g) were dissolved in N,N-dimethylformamide (15 ml), and thereto was added potassium carbonate (1.66 g). The mixture was stirred at room temperature overnight, diluted with ethyl acetate, and washed successively with water and brine. The extract was dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1-3:1) to give 5-bromo-1-(4-ethylphenylmethyl)-1H-pyridin-2-one (1.58 g) as colorless crystals. APCI-Mass m/Z 292/294 (M+H). washed successively with water and brine The extract was dried over magnesium sulfate the solvent was evaporated under reduced pressure The residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1-3:1)