3-(furan-2-yl)-3-oxopropanenitrile

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: To a solution of 2-furoylacetonitrile (0.91 g, 6.73 mmol) in 20 mL of absolute ethanol was added sodium ethoxide (2.5 mL of a 21% weight solution in ethanol, 6.73 mmol) followed by 2,2,2-trifluoroacetoyl bromide-N-(4-methoxyphenyl)hydrazone (2.0 g, 6.73 mmol). This mixture was stirred at ambient temperature for 4 h. The volatiles were removed in vacuo and the residue was dissolved in ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated. The residue was purified by recrystallization from hexane/ethyl acetate to afford 1.1 g (49%) of the title compound. The volatiles were removed in vacuo the residue was dissolved in ethyl acetate washed with water and brine dried (MgSO4) concentrated The residue was purified by recrystallization from hexane/ethyl acetate

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: 63.05 grams (0.5 mole) of furan-2-carboxylic acid ethyl ester and 30.0 grams (1 mole) of sodium hydride (80 weight % suspension in white oil) were reacted with 41 grams (1 mole) of acetonitrile in 500 ml of toluene with the addition of 1 ml of methanol at 90° C. After 3 hours reaction time the toluene was distilled off, the residue stirred with 500 ml of water, acidified with hydrochloric acid to pH 1.5 and the precipitated product filtered off with suction and recrystallized from methanol. There were obtained 51.3 grams (76% of theory) of 2-furanoylacetonitrile having a melting point of 74°-75° C. was distilled off the precipitated product filtered off with suction recrystallized from methanol

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

実験手順: To a solution of 2-furoylacetonitrile (0.91 g, 6.73 mmol) in 20 mL of absolute ethanol was added sodium ethoxide (2.5 mL of a 21% weight solution in ethanol, 6.73 mmol) followed by 2, 2, 2-trifluoroacetoyl bromide-N-(4-methoxyphenyl)hydrazone (2.0 g, 6.73 mmol). This mixture was stirred at ambient temperature for 4 h. The volatiles were removed in vacuo and the residue was dissolved in ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated. The residue was purified by recrystallization from hexane/ethyl acetate to afford 1.1 g (49%) of the title compound. The volatiles were removed in vacuo the residue was dissolved in ethyl acetate washed with water and brine dried (MgSO4) concentrated The residue was purified by recrystallization from hexane/ethyl acetate

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

実験手順: 63.05 grams (0.5 mole) of furan-2-carboxylic acid ethyl ester and 30.0 grams (1 mole) of sodium hydride (80 weight % suspension in white oil) were reacted with 41 grams (1 mole) of acetonitrile in 500 ml of toluene with the addition of 1 ml of methanol at 90° C. After 3 hours reaction time the toluene was distilled off, the residue stirred with 500 ml of water, acidified with hydrochloric acid to pH 1.5 and the precipitated product filtered off with suction and recrystallized from methanol. There were obtained 51.3 grams (76% of theory) of 2-furanoylacetonitrile having a melting point of 74°-75° C. was distilled off the precipitated product filtered off with suction recrystallized from methanol

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

実験手順: To a solution of 2-furoylacetonitrile (0.91 g, 6.73 mmol) in 20 mL of absolute ethanol was added sodium ethoxide (2.5 mL of a 21% weight solution in ethanol, 6.73 mmol) followed by 2,2,2-trifluoroacetoyl bromide-N-(4-methoxyphenyl)hydrazone (2.0 g, 6.73 mmol). This mixture was stirred at ambient temperature for 4 h. The volatiles were removed in vacuo and the residue was dissolved in ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated. The residue was purified by recrystallization from hexane/ethyl acetate to afford 1.1 g (49%) of the title compound. The volatiles were removed in vacuo the residue was dissolved in ethyl acetate washed with water and brine dried (MgSO4) concentrated The residue was purified by recrystallization from hexane/ethyl acetate

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

実験手順: To a solution of 2-furoylacetonitrile (0.91 g, 6.73 mmol) in 20 mL of absolute ethanol was added sodium ethoxide (2.5 mL of a 21% weight solution in ethanol, 6.73 mmol) followed by 2,2,2-trifluoroacetoyl bromide-N-(4-methoxyphenyl)hydrazone (2.0 g, 6.73 mmol). This mixture was stirred at ambient temperature for 4 h. The volatiles were removed in vacuo and the residue was dissolved in ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated. The residue was purified by recrystallization from hexane/ethyl acetate to afford 1.1 g (49%) of the title compound. The volatiles were removed in vacuo the residue was dissolved in ethyl acetate washed with water and brine dried (MgSO4) concentrated The residue was purified by recrystallization from hexane/ethyl acetate

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: To a solution of 2-furoylacetonitrile (0.91 g, 6.73 mmol) in 20 mL of absolute ethanol was added sodium ethoxide (2.5 mL of a 21% weight solution in ethanol, 6.73 mmol) followed by 2,2,2-trifluoroacetoyl bromide-N-(4-methoxyphenyl)hydrazone (2.0 g, 6.73 mmol). This mixture was stirred at ambient temperature for 4 h. The volatiles were removed in vacuo and the residue was dissolved in ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated. The residue was purified by recrystallization from hexane/ethyl acetate to afford 1.1 g (49%) of the title compound. The volatiles were removed in vacuo the residue was dissolved in ethyl acetate washed with water and brine dried (MgSO4) concentrated The residue was purified by recrystallization from hexane/ethyl acetate

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

実験手順: To a mixture of 3-(2-furyl)-3-oxopropanenitrile (5.29 g), p-toluenesulfonyl chloride (9.00 g) and dichloromethane (60 mL) was added dropwise triethylamine (5.99 g) under ice-cooling. After stirring under ice-cooling for 1.5 hrs, the mixture was diluted with dichloromethane (100 mL). The mixture was washed with water (150 mL), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent, hexane:methyl acetate=9:1→3:1) to give the title compound (10.48 g) as a mixture of (E)-form and (Z)-form (3:1). cooling cooling for 1.5 hrs The mixture was washed with water (150 mL) dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was purified by silica gel column chromatography (eluent, hexane:methyl acetate=9:1→3:1)