2-chloro-6-fluorobenzonitrile

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

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 18-crown-6 (3.96 g, 15 mmol) in 30 mL of acetonitrile were added dry potassium acetate (1.47 g, 15 mmol) and 2-chloro-6-fluorobenzonitrile (1.56 g, 10 mmol). The reaction was refluxed under nitrogen for 25 hours, then cooled to room temperature. Sodium hydroxide (2 mL of a 10M solution, 20 mmol) and water (5 mL) were added, and the reaction stirred at room temperature for two hours. The acetonitrile was removed on a rotary evaporator, and the residue was taken up in ether and water. The basic aqueous layer was washed three times with ether. The aqueous layer was then made acidic with HCl, and the product extracted into ether. The ether layer was dried over anhydrous sodium sulfate, filtered, and concentrated. The resulting solid was crystallized from water/methanol to yield 1.11 g of 3-chloro-2-cyanophenol. The reaction was refluxed under nitrogen for 25 hours The acetonitrile was removed on a rotary evaporator The basic aqueous layer was washed three times with ether made acidic with HCl, and the product extracted into ether The ether layer was dried over anhydrous sodium sulfate filtered concentrated The resulting solid was crystallized from water/methanol

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

Procedure: To a solution of 2-fluoro-6-chlorobenzonitrile (10.35 g, 66.5 mmol) in 1,2-dimethoxyethane (50 mL) at 0° C. was added potassium t-butoxide (9.06 g, 80.7 mmol). The mixture was slowly allowed to warm to room temperature over 3 h. The reaction was poured into water and extracted with ether (3 times). The organic layers were washed with brine, dried (MgSO4) and concentrated to afford 13.52 g (97%) of 2-[(1,1-dimethylethyl)oxy]-6-chlorobenzonitrile as a pale yellow oil. extracted with ether (3 times) The organic layers were washed with brine dried (MgSO4) concentrated

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

Procedure: To a solution of 18-crown-6 (3.96 g, 15 mmol) in 30 mL of acetonitrile were added dry potassium acetate (1.47 g, 15 mmol) and 2-chloro-6-fluorobenzonitrile (1.56 g, 10 mmol). The reaction was refluxed under nitrogen for 25 hours, then cooled to room temperature. Sodium hydroxide (2 mL of a 10 M solution, 20 mmol) and water (5 mL) were added, and the reaction stirred at room temperature for two hours. The acetonitrile was removed on a rotary evaporator, and the residue was taken up in ether and water. The basic aqueous layer was washed three times with ether. The aqueous layer was then made acidic with HCl, and the product extracted into ether. The ether layer was dried over anhydrous sodium sulfate, filtered, and concentrated. The resulting solid was crystallized from water/methanol to yield 1.11 g of 3-chloro-2-cyanophenol. The reaction was refluxed under nitrogen for 25 hours The acetonitrile was removed on a rotary evaporator The basic aqueous layer was washed three times with ether made acidic with HCl, and the product extracted into ether The ether layer was dried over anhydrous sodium sulfate filtered concentrated The resulting solid was crystallized from water/methanol

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

Procedure: To a solution of 18-crown-6 (3.96 g, 15 mmol) in 30 mL of acetonitrile were added dry potassium acetate (1.47 g, 15 mmol) and 2-chloro-6-fluorobenzonitrile (1.56 g, 10 mmol). The reaction was refluxed under nitrogen for 25 hours, then cooled to room temperature. Sodium hydroxide (2 mL of a 10 M solution, 20 mmol) and water (5 mL) were added, and the reaction stirred at room temperature for two hours. The acetonitrile was removed on a rotary evaporator, and the residue was taken up in ether and water. The basic aqueous layer was washed three times with ether. The aqueous layer was then made acidic with HCl, and the product extracted into ether. The ether layer was dried over anhydrous sodium sulfate, filtered, and concentrated. The resulting solid was crystallized from water/methanol to yield 1.11 g of 3-chloro-2-cyanophenol. The reaction was refluxed under nitrogen for 25 hours The acetonitrile was removed on a rotary evaporator The basic aqueous layer was washed three times with ether made acidic with HCl, and the product extracted into ether The ether layer was dried over anhydrous sodium sulfate filtered concentrated The resulting solid was crystallized from water/methanol

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

Procedure: A solution of 2-chloro-6-fluorobenzonitrile (8.0 g, 51.61 mmol) in conc. sulphuric acid (50 mL) was heated at 60-70° C. for 6-7 h. The reaction mass was quenched in water and extracted with DCM. The organic layer was dried over anhydrous sodium sulphate and concentrated to afford 5.5 g of desired product. The reaction mass was quenched in water extracted with DCM The organic layer was dried over anhydrous sodium sulphate concentrated

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

Procedure: To a solution of sodium t-butoxide (65 g, 0.642 mol) in THF (1 L), at room temperature under a dry nitrogen atmosphere, ethanol (250 mL, 5.35 mol) was added over a 10 minute period. To the resulting solution, 2-chloro-6-fluorobenzonitrile (100 g, 0.642 mol) was added in portions. The reaction mixture was stirred at room temperature for 30 minutes and then reduced to a volume of approximately 250 mL under reduced pressure. The resulting mixture was poured into chloroform and water and the layers separated. The organic layer was washed with water (twice) and brine, dried over MgSO4 and filtered. The filtrate was concentrated under reduced pressure to afford a light yellow solid. This material was recrystallized from hexanes to provide the 2-chloro-6-ethoxybenzonitrile, 135, (101 g, 87 % yield) as a white crystalline solid. the layers separated The organic layer was washed with water (twice) and brine dried over MgSO4 filtered The filtrate was concentrated under reduced pressure to afford a light yellow solid This material was recrystallized from hexanes

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 0.7 g of N-methyl-N-(p-toluenesulfonyl)-(α, α-dimethyl-4-chlorophenylacetohydrazonoyl chloride in 7 ml of o-dichlorobenzene at room temperature, were added 0.33 g of 2-chloro-6-fluorobenzonitrile and 0.28 g of anhydrous aluminium chloride, and the reaction mixture was heated at 120° C. for 30 minutes. After cooling, the reaction mixture was poured into iced water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried over magnesium sulfate and concentrated under reduced pressure. The residue was subjected to silica gel chromatography to afford 0.6 g of 5-(2-chloro-6-fluorophenyl)-3-(4-chloro-α,α-dimethylbenzyl)-1-methyl-1H-1,2,4-triazole. m.p.97°-100° C. After cooling extracted with ethyl acetate The ethyl acetate layer was washed with water dried over magnesium sulfate concentrated under reduced pressure

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 0.7 g of N-methyl-N-(p-toluenesulfonyl)-(α, α-dimethyl-4-chlorophenylacetohydrazonoyl chloride in 7 ml of o-dichlorobenzene at room temperature, were added 0.33 g of 2-chloro-6-fluorobenzonitrile and 0.28 g of anhydrous aluminium chloride, and the reaction mixture was heated at 120° C. for 30 minutes. After cooling, the reaction mixture was poured into iced water and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried over magnesium sulfate and concentrated under reduced pressure. The residue was subjected to silica gel chromatography to afford 0.6 g of 5-(2-chloro-6-fluorophenyl)-3-(4-chloro-α,α-dimethylbenzyl)-1-methyl-1H-1,2,4-triazole. m.p.97°-100° C. After cooling extracted with ethyl acetate The ethyl acetate layer was washed with water dried over magnesium sulfate concentrated under reduced pressure

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

Procedure: To a solution of 18-crown-6 (3.96 g, 15 mmol) in 30 mL of acetonitrile were added dry potassium acetate (1.47 g, 15 mmol) and 2-chloro-6-fluorobenzonitrile (1.56 g, 10 mmol). The reaction was refluxed under nitrogen for 25 hours, then cooled to room temperature. Sodium hydroxide (2 mL of a 10M solution, 20 mmol) and water (5 mL) were added, and the reaction stirred at room temperature for two hours. The acetonitrile was removed on a rotary evaporator, and the residue was taken up in ether and water. The basic aqueous layer was washed three times with ether. The aqueous layer was then made acidic with HCl, and the product extracted into ether. The ether layer was dried over anhydrous sodium sulfate, filtered, and concentrated. The resulting solid was crystallized from water/methanol to yield 1.11 g of 3-chloro-2-cyanophenol. The reaction was refluxed under nitrogen for 25 hours The acetonitrile was removed on a rotary evaporator The basic aqueous layer was washed three times with ether made acidic with HCl, and the product extracted into ether The ether layer was dried over anhydrous sodium sulfate filtered concentrated The resulting solid was crystallized from water/methanol

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

Procedure: To a solution of 2-fluoro-6-chlorobenzonitrile (10.35 g, 66.5 mmol) in 1,2-dimethoxyethane (50 mL) at 0° C. was added potassium t-butoxide (9.06 g, 80.7 mmol). The mixture was slowly allowed to warm to room temperature over 3 h. The reaction was poured into water and extracted with ether (3 times). The organic layers were washed with brine, dried (MgSO4) and concentrated to afford 13.52 g (97%) of 2-[(1,1-dimethylethyl)oxy]-6-chlorobenzonitrile as a pale yellow oil. extracted with ether (3 times) The organic layers were washed with brine dried (MgSO4) concentrated