benzyl N-[3-(dimethylamino)-3-oxopropyl]carbamate

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

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

Procedure: Benzyl [2-(dimethylcarbamoyl)ethyl]carbamate (I-139) (0.69 g, 2.76 mmol) was dissolved in tetrahydrofuran (10 ml), and with cooling with ice, sodium hydride (oily, about 55%, 0.15 g, 3.44 mmol) was added, followed by stirring for 10 minutes. Iodomethane (0.26 ml, 4.18 mmol) was added, followed by stirring at room temperature for 18 hours, and water was added. After extraction with ethyl acetate and drying over anhydrous sodium sulfate, the solvent was evaporated away, and the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1) to obtain a colorless oil (0.63 g, 86%). was added by stirring at room temperature for 18 hours After extraction with ethyl acetate drying over anhydrous sodium sulfate the solvent was evaporated away the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1)

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

Procedure: 3-[N-(benzyloxycarbonyl)amino]propionic acid (0.70 g, 3.14 mmol) was dissolved in N,N-dimethylformamide (15 ml), and 1-(dimethylaminopropyl)-3-ethylcarbodiimide 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.60 g, 3.13 mmol), 1-hydroxybenzotriazole (0.48 g, 3.13 mmol) and dimethylamine (2.0 M tetrahydrofuran solution, 2.40 ml, 4.80 mmol) were added, followed by stirring at room temperature for 3 days.

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

Procedure: Benzyl [2-(dimethylcarbamoyl)ethyl]carbamate (I-139) (0.69 g, 2.76 mmol) was dissolved in tetrahydrofuran (10 ml), and with cooling with ice, sodium hydride (oily, about 55%, 0.15 g, 3.44 mmol) was added, followed by stirring for 10 minutes. Iodomethane (0.26 ml, 4.18 mmol) was added, followed by stirring at room temperature for 18 hours, and water was added. After extraction with ethyl acetate and drying over anhydrous sodium sulfate, the solvent was evaporated away, and the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1) to obtain a colorless oil (0.63 g, 86%). was added by stirring at room temperature for 18 hours After extraction with ethyl acetate drying over anhydrous sodium sulfate the solvent was evaporated away the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1)

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

Procedure: 3-[N-(benzyloxycarbonyl)amino]propionic acid (0.70 g, 3.14 mmol) was dissolved in N,N-dimethylformamide (15 ml), and 1-(dimethylaminopropyl)-3-ethylcarbodiimide 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.60 g, 3.13 mmol), 1-hydroxybenzotriazole (0.48 g, 3.13 mmol) and dimethylamine (2.0 M tetrahydrofuran solution, 2.40 ml, 4.80 mmol) were added, followed by stirring at room temperature for 3 days.

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

Procedure: To a stirred, cooled (0° C.) solution of Z-Beta-Ala-OH (1.784 g, 8.0 mmol) in dioxane (20 ml) is added EDCI.HCl (2.145 g, 11.2 mmol), hydroxybenzotriazole (1.08 g, 8.0 mmol) and triethylamine (1.56 ml, 11.2 mmol). After stirring at 0° C. for 30 minutes, dimethylamine (0.397 g, 8.8 mmol) is added and stirring continued for a further hour. The reaction mixture was allowed to warm to room temperature and the solvent is removed in vacuo. Initial purification of the crude residue is carried out by flash chromatography of silica eluting with ethyl acetate. The combined organic factions are washed with water (3×20 ml), brine (1×50 ml) and dried over MgSO4. The solvent is removed in vacuo to yield the titled compound as a pale yellow solid. stirring continued for a further hour to warm to room temperature the solvent is removed in vacuo Initial purification of the crude residue The combined organic factions are washed with water (3×20 ml), brine (1×50 ml) dried over MgSO4 The solvent is removed in vacuo

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

Procedure: Benzyl [2-(dimethylcarbamoyl)ethyl]carbamate (I-139) (0.69 g, 2.76 mmol) was dissolved in tetrahydrofuran (10 ml), and with cooling with ice, sodium hydride (oily, about 55%, 0.15 g, 3.44 mmol) was added, followed by stirring for 10 minutes. Iodomethane (0.26 ml, 4.18 mmol) was added, followed by stirring at room temperature for 18 hours, and water was added. After extraction with ethyl acetate and drying over anhydrous sodium sulfate, the solvent was evaporated away, and the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1) to obtain a colorless oil (0.63 g, 86%). was added by stirring at room temperature for 18 hours After extraction with ethyl acetate drying over anhydrous sodium sulfate the solvent was evaporated away the resulting residue was purified by silica gel column chromatography (dichloromethane:methanol=40:1)

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

Procedure: 3-[N-(benzyloxycarbonyl)amino]propionic acid (0.70 g, 3.14 mmol) was dissolved in N,N-dimethylformamide (15 ml), and 1-(dimethylaminopropyl)-3-ethylcarbodiimide 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.60 g, 3.13 mmol), 1-hydroxybenzotriazole (0.48 g, 3.13 mmol) and dimethylamine (2.0 M tetrahydrofuran solution, 2.40 ml, 4.80 mmol) were added, followed by stirring at room temperature for 3 days.