3-Acetoxy-2-methylbenzoyl Chloride

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: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: 3-Acetoxy-2-methylbenzoic acid was slurried in methyl-t-butyl ether (MTBE) and treated with 1.2 equivalents of thionyl chloride and catalytic dimethylformamide. After three hours at ambient temperatures, the reaction was complete, giving a brown soluton. Solvent (MTBE) was removed by vacuum distillation. Residual thionyl chloride was removed by addition of toluene followed by vacuum distillation. The resulting 3-acetoxy-2-methylbenzoyl chloride was isolated either directly as an oil or by crystallization from two volumes of heptane at <10° C. Product was obtained in >100% yield when isolated as an oil and 82-85% yield when crystallized from heptane. giving a brown soluton Solvent (MTBE) was removed by vacuum distillation Residual thionyl chloride was removed by addition of toluene followed by vacuum distillation

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

Procedure: 3-Acetoxy-2-methylbenzoic acid was slurried in methyl-t-butyl ether (MTBE) and treated with 1.2 equivalents of thionyl chloride and catalytic dimethylformamide. After three hours at ambient temperatures, the reaction was complete, giving a brown solution. Solvent (MTBE) was removed by vacuum distillation. Residual thionyl chloride was removed by addition of toluene followed by vacuum distillation. The resulting 3-acetoxy-2-methylbenzoyl chloride was isolated either directly as an oil or by crystallization from two volumes of heptane at <10° C. Product was obtained in >100% yield when isolated as an oil and 82-85% yield when crystallized from heptane. giving a brown solution Solvent (MTBE) was removed by vacuum distillation Residual thionyl chloride was removed by addition of toluene followed by vacuum distillation

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

Procedure: To aluminum trichloride (6.14 g, 0.046 mol) in methylene chloride (26 mL) under an atmosphere of nitrogen was added 5-Bromo-7-azaindole (67, 1.05 g, 5.31 mmol) dissolved in methylene dichloride (20.0 mL). The reaction was stirred at room temperature for 65.0 minutes, then acetic acid 3-chlorocarbonyl-2-methyl-phenyl ester (1.25 g, 5.88 mmol) in methylene dichloride (7.0 mL) was added. The reaction was stirred for 2 hours at room temperature, poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated to give crude compound 84 that was used directly in the next step. The reaction was stirred for 2 hours at room temperature extracted with ethyl acetate The organic layer was washed with brine dried over anhydrous sodium sulfate concentrated

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

Procedure: To aluminum trichloride (6.14 g, 0.046 mol) in methylene chloride (26 mL) under an atmosphere of nitrogen was added 5-Bromo-7-azaindole (67, 1.05 g, 5.31 mmol) dissolved in methylene dichloride (20.0 mL). The reaction was stirred at room temperature for 65.0 minutes, then acetic acid 3-chlorocarbonyl-2-methyl-phenyl ester (1.25 g, 5.88 mmol) in methylene dichloride (7.0 mL) was added. The reaction was stirred for 2 hours at room temperature, poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated to give crude compound 84 that was used directly in the next step. The reaction was stirred for 2 hours at room temperature extracted with ethyl acetate The organic layer was washed with brine dried over anhydrous sodium sulfate concentrated

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

Procedure: To aluminum trichloride (6.14 g, 0.046 mol) in methylene chloride (26 mL) under an atmosphere of nitrogen was added 5-Bromo-7-azaindole (67, 1.05 g, 5.31 mmol) dissolved in methylene dichloride (20.0 mL). The reaction was stirred at room temperature for 65.0 minutes, then acetic acid 3-chlorocarbonyl-2-methyl-phenyl ester (1.25 g, 5.88 mmol) in methylene dichloride (7.0 mL) was added. The reaction was stirred for 2 hours at room temperature, poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and concentrated to give crude compound 84 that was used directly in the next step. The reaction was stirred for 2 hours at room temperature extracted with ethyl acetate The organic layer was washed with brine dried over anhydrous sodium sulfate concentrated

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

Procedure: A process for the preparation of 3-acetoxy-2-methylbenzoyl chloride, which comprises reacting an alkali metal salt of 3-aminonaphthalene-1,5-disulfonic acid with alkali metal hydroxide and water in the weight ratio 1:(1 to 1.6):(1 to 1.6) at 220 to 320° C. to give the dialkali metal salt of 3-hydroxy-2-methylbenzoic acid, separating off insoluble constituents from the reaction mixture, then adjusting the reaction mixture to a pH of 11.5 to 1:3.5 by addition of acid and reacting it with acetic anhydride at -5 to 25° C., precipitating the 3-acetoxy-2-methylbenzoic acid by addition of acid, separating off the 3-acetoxy-2-methylbenzoic acid and reacting it with an inorganic acid chloride to give 3-acetoxy-2-methylbenzoyl chloride.

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

Procedure: A process for the preparation of 3-acetoxy-2-methylbenzoyl chloride, which comprises reacting an alkali metal salt of 3-aminonaphthalene-1,5-disulfonic acid with alkali metal hydroxide and water in the weight ratio 1:(1 to 1.6):(1 to 1.6) at 220 to 320° C. to give the dialkali metal salt of 3-hydroxy-2-methylbenzoic acid, separating off insoluble constituents from the reaction mixture, then adjusting the reaction mixture to a pH of 11.5 to 1:3.5 by addition of acid and reacting it with acetic anhydride at -5 to 25° C., precipitating the 3-acetoxy-2-methylbenzoic acid by addition of acid, separating off the 3-acetoxy-2-methylbenzoic acid and reacting it with an inorganic acid chloride to give 3-acetoxy-2-methylbenzoyl chloride.