ethyl 3-(methylamino)propanoate;hydrochloride

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room+temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room+temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room+temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room+temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: 2-Chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-cabonitrile (I-130) (0.49 g, 1.71 mmol), diisopropylethylamine (0.70 ml, 4.12 mmol) and ethyl 3-(methylamino)propionate hydrochloride (I-159) (0.32 g, 1.91 mmol) were dissolved in dichloromethane (15 ml). After heated under reflux for 3 hours, this was diluted with dichloromethane. After washed with water and drying over anhydrous sodium sulfate, the solvent was evaporated away under reduced pressure, and the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1), then again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1) to obtain the entitled compound (0.53 g, 81%) as a brown oil. After heated under reflux for 3 hours After washed with water drying over anhydrous sodium sulfate the solvent was evaporated away under reduced pressure the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1) again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1)

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

Procedure: 2-Chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-cabonitrile (I-130) (0.49 g, 1.71 mmol), diisopropylethylamine (0.70 ml, 4.12 mmol) and ethyl 3-(methylamino)propionate hydrochloride (I-159) (0.32 g, 1.91 mmol) were dissolved in dichloromethane (15 ml). After heated under reflux for 3 hours, this was diluted with dichloromethane. After washed with water and drying over anhydrous sodium sulfate, the solvent was evaporated away under reduced pressure, and the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1), then again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1) to obtain the entitled compound (0.53 g, 81%) as a brown oil. After heated under reflux for 3 hours After washed with water drying over anhydrous sodium sulfate the solvent was evaporated away under reduced pressure the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1) again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1)

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: A mixture of ethyl 3-(N-benzyloxycarbonyl-N-methylamino)propionate (8 g), 10% palladium on carbon (1.6 g, 50% wet), conc.-hydrochloric acid (5.1 ml) in methanol (160 ml) was stirred for 5 hours at room+temperature under hydrogen atmosphere. Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure to give ethyl 3-(methylamino)propionate hydrochloride (4.31 g). Catalyst was removed by filtration and mother liquor was concentrated in reduced pressure

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

Procedure: 2-Chloro-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-cabonitrile (I-130) (0.49 g, 1.71 mmol), diisopropylethylamine (0.70 ml, 4.12 mmol) and ethyl 3-(methylamino)propionate hydrochloride (I-159) (0.32 g, 1.91 mmol) were dissolved in dichloromethane (15 ml). After heated under reflux for 3 hours, this was diluted with dichloromethane. After washed with water and drying over anhydrous sodium sulfate, the solvent was evaporated away under reduced pressure, and the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1), then again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1) to obtain the entitled compound (0.53 g, 81%) as a brown oil. After heated under reflux for 3 hours After washed with water drying over anhydrous sodium sulfate the solvent was evaporated away under reduced pressure the resulting residue was purified by silica gel column chromatography (dichloromethane to dichloromethane:methanol=70; 1) again purified by silica gel column chromatography (hexane:ethyl acetate=4:1 to 2:1)