methyl 2-chloro-5-[(2,2-dimethylpropanoylamino)methyl]benzoate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Add methyl 2-chloro-5-[(2,2-dimethylpropanoylamino)methyl]benzoate (1.05 kg, 3.7 mol), 1,4-dioxane (5.25 L) and water (3.15 L) together and then add lithium hydroxide (407.8 g, 9.6 mol). Stir the resulting suspension at room temperature for one hour. Acidify the mixture to pH 1 with 5 N aqueous HCl in a dropwise fashion at a rate such that the internal temperature does not exceed 30° C. Concentrate the solution to remove approximately 6 L of solvent, and cool the resulting suspension to 10° C. Filter, wash the resulting solid material with water (8 L), and allow to dry on the sinter for 3 h. Collect the solid, and dry the material in a vacuum oven at 40° C. for 48 h to give the title compound as a free-flowing white solid (775 g, 77.7%). MS (m/z) (35Cl/37Cl) 270/272 (M+1). does not exceed 30° C Concentrate the solution to remove approximately 6 L of solvent cool the resulting suspension to 10° C Filter wash the resulting solid material with water (8 L) to dry on the sinter for 3 h Collect the solid dry the material in a vacuum oven at 40° C. for 48 h

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a thermally controlled reactor, add methyl 5-(aminomethyl)-2-chlorobenzoate hydrochloride (700 g, 3.51 mol, 1.0 equiv), dichloromethane (4.9 L), and N,N-diisopropylethylamine (1.71 L, 9.82 mol, 2.8 equiv). Add pivaloyl chloride (515 mL, 4.21 mol, 1.2 equiv) dropwise at such a rate that the internal temperature does not exceed 21° C. Upon completion of the addition, stir the reaction mixture at room temperature for one hour. Quench the reaction mixture with saturated aqueous sodium bicarbonate (10 L). Extract the mixture with dichloromethane (2×1 L), combine the organic extracts, dry over sodium sulfate, filter, and concentrate under reduced pressure to give an oil, (1.1 kg) carried on crude without further purification. MS (m/z) (35Cl/37Cl) 284/286 (M+1) does not exceed 21° C Upon completion of the addition Quench the reaction mixture with saturated aqueous sodium bicarbonate (10 L) Extract the mixture with dichloromethane (2×1 L) dry over sodium sulfate filter concentrate under reduced pressure to give an oil, (1.1 kg) carried on crude without further purification

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared following the procedure described in step-3 of Intermediate-2 using methyl 2-chloro-5-(pivalamidomethyl)benzoate (2.00 g, 7.05 mmol) in THF:MeOH:H2O (3:2:1; 6 mL) and NaOH (564 mg, 14.1 mmol) to afford 1.8 g of the title product. 1H NMR (300 MHz, DMSO d6): 12.3 (br s, 1H), 8.14 (br t, 1H), 7.61 (s, 1H), 7.47-7.44 (d, J=8.1 Hz, 1H), 7.34-7.32 (d, J=7.8 Hz, 1H), 4.22 (d, J=6.0 Hz, 2H), 1.18 (s, 9H). The title compound was prepared

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared following the procedure described in step-2 of Intermediate-2 using methyl 5-(aminomethyl)-2-chlorobenzoate hydrochloride (1.80 g, 6.00 mmol), DIPEA (3.096 g, 2.4 mmol) and pivaloyl chloride (1.2 mL, 9.0 mmol) in THF (20 mL) to afford 2.0 g of the title product. 1H NMR (300 MHz, DMSO d6): 8.16 (m, 1H), 7.65 (s, 1H), 7.53 (d, J=8.4 Hz, 1H), 7.41 (d, J=8.4 Hz, 1H), 4.25 (d, J=5.7 Hz, 2H), 3.85 (s, 3H), 1.15 (s, 9H). The title compound was prepared

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Add methyl 2-chloro-5-[(2,2-dimethylpropanoylamino)methyl]benzoate (1.05 kg, 3.7 mol), 1,4-dioxane (5.25 L) and water (3.15 L) together and then add lithium hydroxide (407.8 g, 9.6 mol). Stir the resulting suspension at room temperature for one hour. Acidify the mixture to pH 1 with 5 N aqueous HCl in a dropwise fashion at a rate such that the internal temperature does not exceed 30° C. Concentrate the solution to remove approximately 6 L of solvent, and cool the resulting suspension to 10° C. Filter, wash the resulting solid material with water (8 L), and allow to dry on the sinter for 3 h. Collect the solid, and dry the material in a vacuum oven at 40° C. for 48 h to give the title compound as a free-flowing white solid (775 g, 77.7%). MS (m/z) (35Cl/37Cl) 270/272 (M+1). does not exceed 30° C Concentrate the solution to remove approximately 6 L of solvent cool the resulting suspension to 10° C Filter wash the resulting solid material with water (8 L) to dry on the sinter for 3 h Collect the solid dry the material in a vacuum oven at 40° C. for 48 h

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a thermally controlled reactor, add methyl 5-(aminomethyl)-2-chlorobenzoate hydrochloride (700 g, 3.51 mol, 1.0 equiv), dichloromethane (4.9 L), and N,N-diisopropylethylamine (1.71 L, 9.82 mol, 2.8 equiv). Add pivaloyl chloride (515 mL, 4.21 mol, 1.2 equiv) dropwise at such a rate that the internal temperature does not exceed 21° C. Upon completion of the addition, stir the reaction mixture at room temperature for one hour. Quench the reaction mixture with saturated aqueous sodium bicarbonate (10 L). Extract the mixture with dichloromethane (2×1 L), combine the organic extracts, dry over sodium sulfate, filter, and concentrate under reduced pressure to give an oil, (1.1 kg) carried on crude without further purification. MS (m/z) (35Cl/37Cl) 284/286 (M+1) does not exceed 21° C Upon completion of the addition Quench the reaction mixture with saturated aqueous sodium bicarbonate (10 L) Extract the mixture with dichloromethane (2×1 L) dry over sodium sulfate filter concentrate under reduced pressure to give an oil, (1.1 kg) carried on crude without further purification