ethyl 2-morpholin-4-ylpropanoate

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Diisopropyl amine (0.12 moles) was added to a flask and diluted with 40 mL of toluene. The resultant was cooled to −78° C. under nitrogen, and then a hexane solution of n-butyl lithium (0.11 moles) was added thereto, followed by stirring at −78° C. for 1 hour. To this, 2-morpholinopropionic acid ethyl ester (0.105 moles) was added and the resultant was further stirred for 1 hour, and iodomethane (0.21 moles) was added thereto and after the temperature was restored to room temperature, the mixture was stirred for 1 hour. The reaction mixture was quenched with ice water, extracted with ethyl acetate and washed with a saturated sodium chloride aqueous solution, and then the organic layer was dried over magnesium sulphate. The solvent was evaporated, and the residue was purified by column chromatography (hexane/ethyl acetate=4/1) to obtain α-morpholino isobutyric acid ethyl ester (0.55 moles). the resultant was further stirred for 1 hour was restored to room temperature the mixture was stirred for 1 hour The reaction mixture was quenched with ice water extracted with ethyl acetate washed with a saturated sodium chloride aqueous solution the organic layer was dried over magnesium sulphate The solvent was evaporated the residue was purified by column chromatography (hexane/ethyl acetate=4/1)

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Diisopropyl amine (0.12 moles) was added to a flask and diluted with 40 mL of toluene. The resultant was cooled to −78° C. under nitrogen, and then a hexane solution of n-butyl lithium (0.11 moles) was added thereto, followed by stirring at −78° C. for 1 hour. To this, 2-morpholinopropionic acid ethyl ester (0.105 moles) was added and the resultant was further stirred for 1 hour, and iodomethane (0.21 moles) was added thereto and after the temperature was restored to room temperature, the mixture was stirred for 1 hour. The reaction mixture was quenched with ice water, extracted with ethyl acetate and washed with a saturated sodium chloride aqueous solution, and then the organic layer was dried over magnesium sulphate. The solvent was evaporated, and the residue was purified by column chromatography (hexane/ethyl acetate=4/1) to obtain α-morpholino isobutyric acid ethyl ester (0.55 moles). the resultant was further stirred for 1 hour was restored to room temperature the mixture was stirred for 1 hour The reaction mixture was quenched with ice water extracted with ethyl acetate washed with a saturated sodium chloride aqueous solution the organic layer was dried over magnesium sulphate The solvent was evaporated the residue was purified by column chromatography (hexane/ethyl acetate=4/1)

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

Procedure: Ethyl 2-bromopropionate (0.125 moles) was diluted with 75 ml of toluene, and morpholine (0.3 moles) was added thereto, followed by stirring for 10 hours at room temperature. White solid was removed by filtration, and then the filtrate was distilled to obtain 2-morpholinopropionic acid ethyl ester (0.105 moles). was added White solid was removed by filtration the filtrate was distilled

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

Procedure: 3.5 g (40 mmole) of morpholine were added to a mixture of 3.6 g (20 mmole) of ethyl 2-bromopropionate and 50 ml of dry benzene, and then the mixture was heated under reflux for 7 hours. At the end of this time, the reaction mixture was filtered, the filtrate was concentrated by evaporation under reduced pressure, and the residue was dissolved in chloroform. The resulting solution was washed with water, dried, and concentrated by evaporation under reduced pressure, to give 3.19 g of ethyl 2-morpholinopropionate. 10 ml of methanol and 10 ml of a concentrated aqueous solution of ammonium hydroxide were then added to 3.1 g (16.6 mmole) of this ethyl 2-morpholinopropionate, and the resulting mixture was heated under reflux for 28 hours. At the end of this time, the reaction mixture was concentrated by evaporation under reduced pressure, and the residue was dried by heating it under reduced pressure, to give 2-morpholinopropionamide as a precipitate. the resulting mixture was heated under reflux for 28 hours At the end of this time, the reaction mixture was concentrated by evaporation under reduced pressure the residue was dried by heating it under reduced pressure

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

Procedure: 3.5 g (40 mmole) of morpholine were added to a mixture of 3.6 g (20 mmole) of ethyl 2-bromopropionate and 50 ml of dry benzene, and then the mixture was heated under reflux for 7 hours. At the end of this time, the reaction mixture was filtered, the filtrate was concentrated by evaporation under reduced pressure, and the residue was dissolved in chloroform. The resulting solution was washed with water, dried, and concentrated by evaporation under reduced pressure, to give 3.19 g of ethyl 2-morpholinopropionate. 10 ml of methanol and 10 ml of a concentrated aqueous solution of ammonium hydroxide were then added to 3.1 g (16.6 mmole) of this ethyl 2-morpholinopropionate, and the resulting mixture was heated under reflux for 28 hours. At the end of this time, the reaction mixture was concentrated by evaporation under reduced pressure, and the residue was dried by heating it under reduced pressure, to give 2-morpholinopropionamide as a precipitate. the mixture was heated under reflux for 7 hours At the end of this time, the reaction mixture was filtered the filtrate was concentrated by evaporation under reduced pressure the residue was dissolved in chloroform The resulting solution was washed with water dried concentrated by evaporation under reduced pressure