methyl 2-[(2-methoxyacetyl)amino]benzoate

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: [step 1] Methyl 2-(2-methoxyacetamido)benzoate (U.S. Pat. No. 5,091,403; 3.0 g, 13.4 mmol) was suspended in butyric anhydride (12.7 mL, 134.0 mmol), fuming nitric acid (2.3 mL, 51.1 mmol) was added dropwise under ice-cooling, and the mixture was stirred at 0° C. for 40 min. Water was added to the mixture, 4 mol/L aqueous sodium hydroxide solution was added dropwise to neutralize the mixture, and the mixture was extracted 3 times with ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-60/40 v/v) to give methyl 2-(2-methoxyacetamido)-3-nitrobenzoate (1.9 g, 51%). cooling was added dropwise the mixture was extracted 3 times with ethyl acetate The combined organic layers were dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-60/40 v/v)

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

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

Procedure: To a solution of 3.02 g (20 mmol) of methyl anthranilate in 30 ml of methylene chloride was added 2.22 g (22 mmol) of triethylamine. Into the mixture, a solution of 2.39 g (22 mmol) of methoxyacetyl chloride in 15 ml of methylene chloride was dropwise added under chilling with ice. The resulting mixture was then stirred for 1 hour. After adding ice, the stirred mixture was made alkaline by addition of 1 N aqueous sodium hydroxide and then extracted with chloroform. The organic portion was collected and washed sequentially with 3 N HCl, 6 N HCl, water and saturated aqueous sodium chloride. The washed chloroform portion was dried over anhydrous sodium sulfate. The solvent was removed by distillation under reduced pressure to obtain 3.6 g of the desired compound. under chilling with ice After adding ice extracted with chloroform The organic portion was collected washed sequentially with 3 N HCl, 6 N HCl, water and saturated aqueous sodium chloride The washed chloroform portion was dried over anhydrous sodium sulfate The solvent was removed by distillation under reduced pressure

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: [step 1] Methyl 2-(2-methoxyacetamido)benzoate (U.S. Pat. No. 5,091,403; 3.0 g, 13.4 mmol) was suspended in butyric anhydride (12.7 mL, 134.0 mmol), fuming nitric acid (2.3 mL, 51.1 mmol) was added dropwise under ice-cooling, and the mixture was stirred at 0° C. for 40 min. Water was added to the mixture, 4 mol/L aqueous sodium hydroxide solution was added dropwise to neutralize the mixture, and the mixture was extracted 3 times with ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-60/40 v/v) to give methyl 2-(2-methoxyacetamido)-3-nitrobenzoate (1.9 g, 51%). cooling was added dropwise the mixture was extracted 3 times with ethyl acetate The combined organic layers were dried over anhydrous magnesium sulfate concentrated under reduced pressure The residue was purified by silica gel column chromatography (hexane/ethyl acetate=100/0 v/v-60/40 v/v)

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