1-(3,5-dichloro-4-hydroxyphenyl)ethanone

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

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ 8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ 8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

Procedure: In 28 ml of acetic anhydride was dissolved 50.0 g of 2,6-dichlorophenol and, one or two drops of conc. sulfuric acid were added to the solution The mixture was reacted at 130° C. for 10 minutes to effect acetylation After the reaction, the reaction solution was poured onto 300 ml of ice water and the mixture was extracted with ethyl acetate After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight, the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance. Next, the oily substance was dissolved in 150 ml of nitrobenzene and 56 8 g of powdery aluminum chloride was gradually added to the solution. The reaction was carried out at 60° to 70° C. for 27 hours to effect Fries rearrangement. After completion of the reaction, the reaction solution was poured onto 1 liter of cold dil. hydrochloric acid and the organic phase was separated from the aqueous phase. The organic phase was extracted with 2N sodium hydroxide aqueous solution After the extraction, the solution was rendered acidic by adding 5N hydrochloric acid thereto followed by extracting with ethyl acetate. After drying over anhydrous magnesium sulfate, the ethyl acetate phase was concentrated to give 38.5 g of 2,6-dichloro-4-acetylphenol as crude crystals. The crystals were recrystallized from hot ethyl acetate to give 19.9 g of pure white 2,6-dichloro-4-acetylphenol. 2,6-dichloro-4-acetylphenol (3,5-dichloro-4-hydroxyacetophenone): C8H6Cl2O2 were added to the solution The mixture was reacted at 130° C. for 10 minutes After the reaction the mixture was extracted with ethyl acetate After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance After completion of the reaction the organic phase was separated from the aqueous phase The organic phase was extracted with 2N sodium hydroxide aqueous solution After the extraction by adding 5N hydrochloric acid by extracting with ethyl acetate After drying over anhydrous magnesium sulfate the ethyl acetate phase was concentrated

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

Procedure: In 28 ml of acetic anhydride was dissolved 50.0 g of 2,6-dichlorophenol and, one or two drops of conc. sulfuric acid were added to the solution. The mixture was reacted at 130° C. for 10 minutes to effect acetylation. After the reaction, the reaction solution was poured onto 300 ml of ice water and the mixture was extracted with ethyl acetate. After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight, the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance. Next, the oily substance was dissolved in 150 ml of nitrobenzene and 56.8 g of powdery aluminum chloride was gradually added to the solution. The reaction was carried out at 60° to 70° C. for 27 hours to effect Fries rearrangement. After completion of the reaction, the reaction solution was poured onto 1 liter of cold dil. hydrochloric acid and the organic phase was separated from the aqueous phase. The organic phase was extracted with 2N sodium hydroxide aqueous solution. After the extraction, the solution was rendered acidic by adding 5N hydrochloric acid thereto followed by extracting with ethyl acetate. After drying over anhydrous magnesium sulfate, the ethyl acetate phase was concentrated to give 38.5 g of 2,6-dichloro-4-acetylphenol as crude crystals. The crystals were recrystallized from hot ethyl acetate to give 19.9 g of pure white 2,6-dichloro-4-acetylphenol. 2,6-Dichloro-4-acetylphenol (3,5-dichloro-4-hydroxyacetophenone): C8H6Cl2O2. were added to the solution The mixture was reacted at 130° C. for 10 minutes After the reaction the mixture was extracted with ethyl acetate After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance After completion of the reaction the organic phase was separated from the aqueous phase The organic phase was extracted with 2N sodium hydroxide aqueous solution After the extraction by adding 5N hydrochloric acid by extracting with ethyl acetate After drying over anhydrous magnesium sulfate the ethyl acetate phase was concentrated

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

Procedure: In 28 ml of acetic anhydride was dissolved 50.0 g of 2,6-dichlorophenol and, one or two drops of conc. sulfuric acid were added to the solution. The mixture was reacted at 130° C. for 10 minutes to effect acetylation. After the reaction, the reaction solution was poured onto 300 ml of ice water and the mixture was extracted with ethyl acetate. After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight, the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance. Next, the oily substance was dissolved in 150 ml of nitrobenzene and 56.8 g of powdery aluminum chloride was gradually added to the solution. The reaction was carried out at 60° to 70° C. for 27 hours to effect Fries rearrangement. After completion of the reaction, the reaction solution was poured onto 1 liter of cold dil. hydrochloric acid and the organic phase was separated from the aqueous phase. The organic phase was extracted with 2N sodium hydroxide aqueous solution. After the extraction, the solution was rendered acidic by adding 5N hydrochloric acid thereto followed by extracting with ethyl acetate. After drying over anhydrous magnesium sulfate, the ethyl acetate phase was concentrated to give 38.5 g of 2,6-dichloro-4-acetylphenol as crude crystals. The crystals were recrystallized from hot ethyl acetate to give 19.9 g of pure white 2,6-dichloro-4-acetylphenol. 2,6-Dichloro-4-acetylphenol (3,5-dichloro-4-hydroxyacetophenone): C8H6Cl2O2. were added to the solution The mixture was reacted at 130° C. for 10 minutes After the reaction the mixture was extracted with ethyl acetate After drying the ethyl acetate phase over anhydrous magnesium sulfate overnight the ethyl acetate phase was concentrated to give 58.2 g of colorless oily substance After completion of the reaction the organic phase was separated from the aqueous phase The organic phase was extracted with 2N sodium hydroxide aqueous solution After the extraction by adding 5N hydrochloric acid by extracting with ethyl acetate After drying over anhydrous magnesium sulfate the ethyl acetate phase was concentrated

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ 8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ 8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)

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

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

Procedure: Sodium hydride (50% w/w dispersion in mineral oil, 1.32 g) was treated under argon with repeated washes of hexane. The oil-free residue was suspended in dry DMF (10 ml) and, with stirring and cooling (ice-bath), a solution of 3,5-dichloro-4-hydroxyacetophenone (5.13 g) in dry DMF (15 ml) was added dropwise. Stirring was continued for 30 minutes when methyl bromoacetate (3.06 ml) was added dropwise and stirring was continued for a further 18 hours at ambient temperature. The reaction mixture was added to water, the mixture was extracted twice with ethyl acetate, the organic phases dried (MgSO4), filtered and then evaporated. The residue, after recrystallisation from hexane (250 ml), gave methyl 4-acetyl-2,6-dichlorophenoxyacetate, 4.25 g, as white crystals: NMR (d6DMSO) δ 8.00 (2H, s), 4.80 (2H, s), 3.73 (3H, s), 2.59 (3H, s). cooling (ice-bath) Stirring stirring was continued for a further 18 hours at ambient temperature the mixture was extracted twice with ethyl acetate the organic phases dried (MgSO4) filtered evaporated The residue, after recrystallisation from hexane (250 ml)