1-(4-fluorophenyl)-2-methylsulfonylethanone

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (4.8.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane-ethyl acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane-ethyl acetate)

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (48.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate)

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (4.8.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane-ethyl acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane-ethyl acetate)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (4.8.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane-ethyl acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane-ethyl acetate)

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (48.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane—ethyl acetate) acetate)

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

Procedure: To a 50 ml volume three-necked flask, 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3) (5.0 g), methylhydrazine (14-a) (1.2 g), and ethanol (17.1 ml) were added under a nitrogen atmosphere, and heated to reflux for 4 hours. After the mixture was cooled, the precipitated solid was removed by filtration. The filtrate was concentrated under reduced pressure. To the residue was added hot hexane to be dissolved. The mixture was left to cool. Then, the precipitated crystals were collected by filtration, washed, and dried under reduced pressure. The crystal was purified by recrystallization (methanol) to give 1.8 g of 1-[1-(4-fluorophenyl)-2-methylsulfonylethylidene]-2-methylhydrazine (5-2-4). heated to reflux for 4 hours After the mixture was cooled the precipitated solid was removed by filtration The filtrate was concentrated under reduced pressure To the residue was added hot hexane to be dissolved The mixture was left to cool Then, the precipitated crystals were collected by filtration washed dried under reduced pressure The crystal was purified by recrystallization (methanol)

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

Procedure: To a 1 L volume four-necked flask, sodium methanesulfinate (31.3 g), 4-fluorophenacyl chloride (21-b) (4.8.1 g), and ethanol (300 ml) were added under a nitrogen atmosphere, and heated to reflux for 1 hour. After the mixture was cooled to room temperature, water (500 ml) was added. The precipitated solids were collected by filtration, washed with water, and dried. The solids were dissolved in ethyl acetate, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by recrystallization (hexane-ethyl acetate) to give 51.9 g of 1-(4-fluorophenyl)-2-methylsulfonylethan-1-one (7-2-3). heated to reflux for 1 hour The precipitated solids were collected by filtration washed with water dried The solids were dissolved in ethyl acetate dried over anhydrous sodium sulfate concentrated under reduced pressure The resulting residue was purified by recrystallization (hexane-ethyl acetate)