1-(4-chlorophenoxy)-3,3-dimethylbutan-2-one

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: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixture was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (18% of theory) of 2-(4-chlorophenoxymethyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° C. were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo

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

Procedure: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixure was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (84% of theory) of 2-(4-chlorophenoxy-methyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo

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

Procedure: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixture was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (84% of theory) of 2-(4-chlorophenoxymethyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° C. were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo

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

Procedure: 226 g (1 mol) of 1-(4-chlorophenoxy)-3,3-dimethylbutan-2-one (obtained from sodium 4-chlorophenolate and α-bromopinacolone; in this respect, see German Patent Specification No. 2,201,063), together with 120 g (1.07 mols) of glycerol, 19 g (0.1 mol) of p-toluenesulphonic acid monohydrate and 30 ml of butanol, are dissolved in 1,000 ml of toluene, and the mixture is heated under reflux for 16 hours in a water separator. After the mixture has been cooled, the toluene phase is washed with 4 times 250 ml of water, dried over magnesium sulphate, filtered, and evaporated down in vacuo. 186 g (65.4% of theory) of 2-(t-butyl)-2-(4-chlorophenoxymethyl)-4-hydroxymethyl-1,3-dioxolane of boiling point b.p.0.1 : 161° C.-163° C. are obtained by distillation.

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

Procedure: A solution of 162 ml (2.2 mole) of dimethyl sulphide in 400 ml of absolute acetonitrile is added to a solution of 189 ml (2.0 mole) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixture is allowed to stir overnight at room temperature. Then 118.8 g (2.2 mole) of sodium methylate are added. The mixture is allowed to stir for 30 minutes and then a solution of 272 g (1.2 mole) of 1-(4-chlorophenoxy)-3,3-dimethyl-2-butanone in 600 ml of absolute acetonitrile is added dropwise within 30 minutes. The reaction mixture is allowed to stir overnight. It is then evaporated, and the residue is partitioned between water and ethyl acetate, the organic phase is separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate, evaporated and the residue is distilled in vacuo. 242.2 g (84% of theory) of 2-(4-chlorophenoxymethyl)-2-tert.-butyl-oxirane of boiling point 115° -22° C./0.003 mm Hg column and of melting point 50°-52° C. are obtained. to stir for 30 minutes to stir overnight It is then evaporated the residue is partitioned between water and ethyl acetate the organic phase is separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate evaporated the residue is distilled in vacuo

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

Procedure: 15 g of sodium hydride in the form of a 55% dispersion in oil are added under nitrogen to 150 ml of 1,2-dimethoxyethane. Then a solution of 69 g (0.315 mole) of diethyl (1H-1,2,4-triazol-1-yl)methylphosphonate, 68 g (0.3 mole) of 2,2-dimethyl-4-(4-chlorophenoxy)butan-3-one and a trace of 15-crown-5 in 500 ml of dimethoxyethane are added dropwise. The reaction mixture is stirred for about 10 hours and, after the dropwise addition of ice/water, extracted with methylene chloride. The combined extracts are washed with water, dried over sodium sulfate, filtered and concentrated. The oily residue is purified by column chromatography over silica gel with a 4:2:2:2 mixture of toluene/cyclohexane/diethyl ether/dichloromethane as eluant, affording the product in the form of a yellow oil. extracted with methylene chloride The combined extracts are washed with water dried over sodium sulfate filtered concentrated The oily residue is purified by column chromatography over silica gel with a 4:2:2:2 mixture of toluene/cyclohexane/diethyl ether/dichloromethane as eluant affording the product in the form of a yellow oil

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

Procedure: 100 ml of water, followed by 28 ml of 10% strength aqueous sodium hydroxide solution, were added to a stirred solution of 22.6 g (0.1 mol) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one and 21.4 g (0.2 mol) of 3-pyridinealdehyde in 500 ml of methanol. The solution was subsequently stirred at room temperature for 4 days, the methanol was removed in vacuo and the aqueous residue was taken up in ether. The aqueous phase was separated off, the organic phase was extracted three times with 1 N hydrochloric acid and the hydrochloric acid extracts were neutralized with solid sodium bicarbonate and extracted three times with ethyl acetate. 22.8 g (72% of theory) Of 2-(4-chlorophenoxy)-4,4-dimethyl-1-pyridin-3-yl-1-penten-3-one of melting point 74°-76° C. were obtained from the ethyl acetate phase. the methanol was removed in vacuo The aqueous phase was separated off the organic phase was extracted three times with 1 N hydrochloric acid extracted three times with ethyl acetate

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

Procedure: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixture was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (18% of theory) of 2-(4-chlorophenoxymethyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° C. were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo

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

Procedure: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixure was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (84% of theory) of 2-(4-chlorophenoxy-methyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo

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

Procedure: A solution of 162 ml (2.2 moles) of dimethyl sulphide in 400 ml of absolute acetonitrile was added to a solution of 189 ml (2.0 moles) of dimethyl sulphate in 1,200 ml of absolute acetonitrile at room temperature. The reaction mixture was stirred overnight at room temperature. 118.8 g (2.2 moles) of sodium methylate were then added. The mixture was stirred for 30 minutes and a solution of 272 g (1.2 moles) of 1-(4-chlorophenoxy)-3,3-dimethyl-butan-2-one in 600 ml of absolute acetonitrile was then added dropwise in the course of 30 minutes. The reaction mixture was subsequently stirred overnight. It was then concentrated, the residue was partitioned between water and ethyl acetate, the organic phase was separated off, washed twice with water and once with saturated sodium chloride solution, dried over sodium sulphate and concentrated and the residue was distilled in vacuo. 242.4 g (84% of theory) of 2-(4-chlorophenoxymethyl)-2-tert.-butyl-oxirane of boiling point 115°-22° C./0.003 mm Hg column and of melting point 50°-52° C. were obtained. The mixture was stirred for 30 minutes The reaction mixture was subsequently stirred overnight It was then concentrated the residue was partitioned between water and ethyl acetate the organic phase was separated off washed twice with water and once with saturated sodium chloride solution dried over sodium sulphate concentrated the residue was distilled in vacuo