2-(4-chlorophenyl)-2-hydroxyiminoacetonitrile

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was added dropwise to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling. The mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. A solution of tertbutyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) was added dropwise, under ice-cooling, to the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile. The mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was then washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. Petroleum ether was added to the residue and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight The mixture was stirred for 5 hours at the same temperature to stand for 48 hours The reaction mixture was then washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated Petroleum ether was added to the residue to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was dropwise added to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. To the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile was dropwise added a solution of tert-butyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was in turn washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. To the residue was added petroleum ether and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight cooling the mixture was stirred for 5 hours at the same temperature to stand for 48 hours washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated To the residue was added petroleum ether to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was dropwise added to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. To the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile was dropwise added a solution of tert-butyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was in turn washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. To the residue was added petroleum ether and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight cooling the mixture was stirred for 5 hours at the same temperature to stand for 48 hours washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated To the residue was added petroleum ether to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was added dropwise to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling. The mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. A solution of tert-butyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) was added dropwise, under ice-cooling, to the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)-acetonitrile. The mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was then washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. Petroleum ether was added to the residue and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight The mixture was stirred for 5 hours at the same temperature to stand for 48 hours The reaction mixture was then washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated Petroleum ether was added to the residue to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was added dropwise to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling. The mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. A solution of tertbutyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) was added dropwise, under ice-cooling, to the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile. The mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was then washed with water, 1 N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. Petroleum ether was added to the residue and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight The mixture was stirred for 5 hours at the same temperature to stand for 48 hours The reaction mixture was then washed with water, 1 N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated Petroleum ether was added to the residue to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was added dropwise to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling. The mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. A solution of tertbutyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) was added dropwise, under ice-cooling, to the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile. The mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was then washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. Petroleum ether was added to the residue and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight The mixture was stirred for 5 hours at the same temperature to stand for 48 hours The reaction mixture was then washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated Petroleum ether was added to the residue to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration

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

Procedure: A suspension of 2-hydroxyimino-2-(4-chlorophenyl)acetonitrile (6.75 g.) and dimethylaniline (4.5 g.) in a mixture of dichloromethane (70 ml.), dioxane (10 ml.) and tetrahydrofuran (10 ml.) was dropwise added to a solution of trichloromethyl chloroformate (phosgene dimer) (16 g.) in benzene (22 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand overnight. To the resultant mixture containing 2-chlorocarbonyloxyimino-2-(4-chlorophenyl)acetonitrile was dropwise added a solution of tert-butyl alcohol (8.9 g.) and pyridine (9.6 ml.) in dichloromethane (20 ml.) under ice-cooling, and the mixture was stirred for 5 hours at the same temperature and allowed to stand for 48 hours. The reaction mixture was in turn washed with water, 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane was added to the residue. An insoluble material was filtered off and the filtrate was concentrated. To the residue was added petroleum ether and the mixture was allowed to stand to precipitate crystals. The crystals were dissolved in hot petroleum ether and the solution was filtered. The filtrate was cooled to precipitate crystals and the crystals were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-(4-chlorophenyl)acetonitrile (1.6 g.). These crystals were recrystallized from methanol to give the pure compound (0.7 g.), mp 91° to 92° C. cooling to stand overnight cooling the mixture was stirred for 5 hours at the same temperature to stand for 48 hours washed with water, 1N hydrochloric acid, water a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate The solvent was distilled off n-hexane was added to the residue An insoluble material was filtered off the filtrate was concentrated To the residue was added petroleum ether to precipitate crystals The crystals were dissolved in hot petroleum ether the solution was filtered The filtrate was cooled to precipitate crystals the crystals were collected by filtration