1-(2,3-dichloro-4-methoxyphenyl)-2-phenylethanone

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

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

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

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Acetic anhydride (100 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (29.5 g., 0.01 mole) in bis(dimethylamino)methane (100 ml.) under nitrogen with cooling to maintain the reaction mixture temperature below 60° C. The reaction mixture is stirred at 25° C. for 2 hours, and poured into ice water (1500 ml.) to precipitate 7.4 g. of 2,3-dichloro-4-(2-phenylacryloyl)-anisole which melts at 87°-89° C. with cooling to maintain the reaction mixture temperature below 60° C to precipitate 7.4 g

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

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Acetic anhydride (100 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (29.5 g., 0.01 mole) in bis(dimethylamino)methane (100 ml.) under nitrogen with cooling to maintain the reaction mixture temperature below 60° C. The reaction mixture is stirred at 25° C. for 2 hours, and poured into ice water (1500 ml.) to precipitate 7.4 g. of 2,3-dichloro-4-(2-phenylacryloyl)anisole which melts at 87°-89° C. with cooling to maintain the reaction mixture temperature below 60° C to precipitate 7.4 g

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

Procedure: Acetic anhydride (150 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (8.95 g., 30.3 mmol) in 15.3 ml. of N,N,N',N'-tetramethylenediaminomethane under an atmosphere of argon with ice-bath cooling. The reaction mixture stirred at 25° for 2 hrs. and poured into ice-water affords 11.9 g. of beige solid. An ethereal solution of the solid is washed with hydrochloric acid, water and then dried over magnesium sulfate. Removal of the solvent under reduced pressure provides 8.77 g. (94% yield) of 2,3-dichloro-4-(2-phenylacryloyl)anisole, m.p. 83.5°-86°. affords 11.9 g An ethereal solution of the solid is washed with hydrochloric acid, water dried over magnesium sulfate Removal of the solvent under reduced pressure provides 8.77 g

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Acetic anhydride (100 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (29.5 g., 0.01 mole) in bis(dimethylamino)methane (100 ml.) under nitrogen with cooling to maintain the reaction mixture temperature below 60° C. The reaction mixture is stirred at 25° C. for 2 hours, and poured into ice water (1500 ml.) to precipitate 7.4 g. of 2,3-dichloro-4-(2-phenylacryloyl)anisole which melts at 87°-89° C. with cooling to maintain the reaction mixture temperature below 60° C to precipitate 7.4 g

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

Procedure: 2',3' -Dichloro-4'-methoxy-2-phenylacetophenone (300 g.) is suspended in 1000 ml. of N,N,N,N-tetramethylmethanediamine at 25°C. under nitrogen, and acetic anhydride (1000 ml.) is added dropwise. The reaction mixture is maintained below 40°C. by cooling in an ice-water bath and regulating the rate of anhydride addition. The reaction mixture is left at 25°C. for 1 hour then slowly added to crushed ice-water (8 liters) with stirring. The white solid precipitate is collected by suction filtration, washed with water, and air-dried at 25°C. for 2 days. Yield: 310.5 g. (99%), mp 87°-89°C. A sample recrystallized from benzene-hexane melts at 87°-89°C. The reaction mixture is maintained below 40°C. by cooling in an ice-water bath then slowly added The white solid precipitate is collected by suction filtration washed with water air-dried at 25°C. for 2 days A sample recrystallized from benzene-hexane melts at 87°-89°C.

Conditions: temp:5.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Aluminum chloride (395 g.) is added portionwise to a stirred solution of 2,3-dichloroanisole (500 g.) and phenylacetyl chloride (392 ml.) in carbon disulfide (1200 ml.) with cooling to 5°C. in an ice-water bath. After the addition, the reaction mixture is allowed to warm to room temperature, whereupon it forms a solid mass. After standing at 20°-25°C. overnight, the reaction vessel is flushed with nitrogen for 15 minutes, and crushed ice (about 2 kg.) and 12N HCl (400 ml.) are slowly added alternately with cooling in an ice bath. The pale yellow gummy solid that precipitates is collected by suction filtration on a sintered glass funnel to remove water as well as carbon disulfide. The solid product is washed well with water and sucked dry. To remove any persistent carbon disulfide, the product is triturated with hexane and again collected by filtration. Yield after drying in a steam oven at 70°C. for 18 hours is 803.5 g. (98%), mp 125°-127°C. A sample recrystallized from benzene-cyclohexane (2:1) melts at 128°-129°C. After the addition to warm to room temperature, whereupon it the reaction vessel is flushed with nitrogen for 15 minutes crushed ice (about 2 kg.) and 12N HCl (400 ml.) are slowly added alternately with cooling in an ice bath The pale yellow gummy solid that precipitates is collected by suction filtration on a sintered glass funnel to remove water as well as carbon disulfide The solid product is washed well with water sucked dry To remove any persistent carbon disulfide the product is triturated with hexane again collected by filtration Yield after drying in a steam oven at 70°C. for 18 hours A sample recrystallized from benzene-cyclohexane (2:1) melts at 128°-129°C.

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

Procedure: Acetic anhydride (150 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (8.95 g., 30.3 mmol) in 15.3 ml. of N,N,N'N'-tetramethylenediaminomethane under an atmosphere of argon with icebath cooling. The reaction mixture stirred at 25° for 2 hrs. and poured into ice-water affords 11.9 g. of beige solid. An ethereal solution of the solid is washed with hydrochloric acid, water and then dried over magnesium sulfate. Removal of the solvent under reduced pressure provides 8.77 g. (94% yield) of 2,3-dichloro-4-(2-phenylacryloyl)anisole, m.p. 83.5°-86°. affords 11.9 g An ethereal solution of the solid is washed with hydrochloric acid, water dried over magnesium sulfate Removal of the solvent under reduced pressure provides 8.77 g

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Acetic anhydride (100 ml.) is added dropwise to a suspension of 2,3-dichloro-4-phenylacetylanisole (29.5 g., 0.01 mole) in bis(dimethylamino)methane (100 ml.) under nitrogen with cooling to maintain the reaction mixture temperature below 60° C. The reaction mixture is stirred at 25° C. for 2 hours, and poured into ice water (1500 ml.) to precipitate 7.4 g. of 2,3-dichloro-4-(2-phenylacryloyl)-anisole which melts at 87°-89° C. with cooling to maintain the reaction mixture temperature below 60° C to precipitate 7.4 g