2-(3,3-dimethylmorpholin-4-yl)ethanol

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

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 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (7.2 g, 45 mmol) and CBr4 (16.4 g, 49 mmol, 1.1 equiv.) in THF (150 mL) was added dropwise a solution of PPh3 (12.9 g, 49 mmol, 1.1 equiv.) in THF (75 mL). The resulting slurry was stirred at room temperature for 19 hours, at which time the slurry was diluted with hexanes and filtered. The filtrate was concentrated in vacuo and the resulting oil was diluted with CH2Cl2. The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine. The aqueous layers were back-extracted with CH2Cl2 and the combined organic layers were dried over Na2SO4 and concentrated. The crude product was distilled (65° C., 0.5 torr) to provide 4-(2-Bromo-ethyl)-3,3-dimethyl-morpholine (5.4 g, 54%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ 3.69 (t, 2H), 3.28 (s, 2H), 3.28 (t, 2H), 2.70 (t, 2H), 2.58 (t, 2H), 0.99 (s, 6H); LC/MS found 222.02 (M++H, C8H17BrNO requires 222.05). filtered The filtrate was concentrated in vacuo the resulting oil was diluted with CH2Cl2 The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine The aqueous layers were back-extracted with CH2Cl2 the combined organic layers were dried over Na2SO4 concentrated The crude product was distilled (65° C., 0.5 torr)

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

Procedure: In a pressure vessel containing 3,3-dimethylmorpholine (12.15 g, 106 mmol) in MeOH (17 mL) at −78° C. (external temperature, acetone/CO2(s)) was added ethylene oxide (6.2 mL, 125 mmol, 1.2 equiv., condensed at −78° C.). The solution was sealed and stirred over 20 hours, during which time the temperature warmed to room temperature. The reaction mixture was concentrated in vacuo and the crude product was distilled (75° C., 0.5 torr) to provide 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (14 g, 82%) as a colorless oil contaminated with ˜15% of 3,3-dimethyl-morpholine. LC/MS found 160.10 (M++H, C8H18NO2 requires 160.13). The solution was sealed The reaction mixture was concentrated in vacuo the crude product was distilled (75° C., 0.5 torr)

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

Procedure: In a pressure vessel containing 3,3-dimethylmorpholine (12.15 g, 106 mmol) in MeOH (17 mL) at −78° C. (external temperature, acetone/CO2(s)) was added ethylene oxide (6.2 mL, 125 mmol, 1.2 equiv., condensed at −78° C.). The solution was sealed and stirred over 20 hours, during which time the temperature warmed to room temperature. The reaction mixture was concentrated in vacuo and the crude product was distilled (75° C., 0.5 torr) to provide 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (14 g, 82%) as a colorless oil contaminated with ˜15% of 3,3-dimethyl-morpholine. LC/MS found 160.10 (M++H, C8H18NO2 requires 160.13). The solution was sealed The reaction mixture was concentrated in vacuo the crude product was distilled (75° C., 0.5 torr)

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

Procedure: To a solution of 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (7.2 g, 45 mmol) and CBr4 (16.4 g, 49 mmol, 1.1 equiv.) in THF (150 mL) was added dropwise a solution of PPh3 (12.9 g, 49 mmol, 1.1 equiv.) in THF (75 mL). The resulting slurry was stirred at room temperature for 19 hours, at which time the slurry was diluted with hexanes and filtered. The filtrate was concentrated in vacuo and the resulting oil was diluted with CH2Cl2. The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine. The aqueous layers were back-extracted with CH2Cl2 and the combined organic layers were dried over Na2SO4 and concentrated. The crude product was distilled (65° C., 0.5 torr) to provide 4-(2-Bromo-ethyl)-3,3-dimethyl-morpholine (5.4 g, 54%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ 3.69 (t, 2H), 3.28 (s, 2H), 3.28 (t, 2H), 2.70 (t, 2H), 2.58 (t, 2H), 0.99 (s, 6H); LC/MS found 222.02 (M++H, C8H17BrNO requires 222.05). filtered The filtrate was concentrated in vacuo the resulting oil was diluted with CH2Cl2 The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine The aqueous layers were back-extracted with CH2Cl2 the combined organic layers were dried over Na2SO4 concentrated The crude product was distilled (65° C., 0.5 torr)

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

Procedure: In a pressure vessel containing 3,3-dimethylmorpholine (12.15 g, 106 mmol) in MeOH (17 mL) at −78° C. (external temperature, acetone/CO2(s)) was added ethylene oxide (6.2 mL, 125 mmol, 1.2 equiv., condensed at −78° C.). The solution was sealed and stirred over 20 hours, during which time the temperature warmed to room temperature. The reaction mixture was concentrated in vacuo and the crude product was distilled (75° C., 0.5 torr) to provide 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (14 g, 82%) as a colorless oil contaminated with ˜15% of 3,3-dimethyl-morpholine. LC/MS found 160.10 (M++H, C8H18NO2 requires 160.13). The solution was sealed The reaction mixture was concentrated in vacuo the crude product was distilled (75° C., 0.5 torr)

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

Procedure: To a solution of 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (7.2 g, 45 mmol) and CBr4 (16.4 g, 49 mmol, 1.1 equiv.) in THF (150 mL) was added dropwise a solution of PPh3 (12.9 g, 49 mmol, 1.1 equiv.) in THF (75 mL). The resulting slurry was stirred at room temperature for 19 hours, at which time the slurry was diluted with hexanes and filtered. The filtrate was concentrated in vacuo and the resulting oil was diluted with CH2Cl2. The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine. The aqueous layers were back-extracted with CH2Cl2 and the combined organic layers were dried over Na2SO4 and concentrated. The crude product was distilled (65° C., 0.5 torr) to provide 4-(2-Bromo-ethyl)-3,3-dimethyl-morpholine (5.4 g, 54%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ 3.69 (t, 2H), 3.28 (s, 2H), 3.28 (t, 2H), 2.70 (t, 2H), 2.58 (t, 2H), 0.99 (s, 6H); LC/MS found 222.02 (M++H, C8H17BrNO requires 222.05). filtered The filtrate was concentrated in vacuo the resulting oil was diluted with CH2Cl2 The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine The aqueous layers were back-extracted with CH2Cl2 the combined organic layers were dried over Na2SO4 concentrated The crude product was distilled (65° C., 0.5 torr)

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

Procedure: In a pressure vessel containing 3,3-dimethylmorpholine (12.15 g, 106 mmol) in MeOH (17 mL) at −78° C. (external temperature, acetone/CO2(s)) was added ethylene oxide (6.2 mL, 125 mmol, 1.2 equiv., condensed at −78° C.). The solution was sealed and stirred over 20 hours, during which time the temperature warmed to room temperature. The reaction mixture was concentrated in vacuo and the crude product was distilled (75° C., 0.5 torr) to provide 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (14 g, 82%) as a colorless oil contaminated with ˜15% of 3,3-dimethyl-morpholine. LC/MS found 160.10 (M++H, C8H18NO2 requires 160.13). The solution was sealed The reaction mixture was concentrated in vacuo the crude product was distilled (75° C., 0.5 torr)

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

Procedure: To a solution of 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (7.2 g, 45 mmol) and CBr4 (16.4 g, 49 mmol, 1.1 equiv.) in THF (150 mL) was added dropwise a solution of PPh3 (12.9 g, 49 mmol, 1.1 equiv.) in THF (75 mL). The resulting slurry was stirred at room temperature for 19 hours, at which time the slurry was diluted with hexanes and filtered. The filtrate was concentrated in vacuo and the resulting oil was diluted with CH2Cl2. The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine. The aqueous layers were back-extracted with CH2Cl2 and the combined organic layers were dried over Na2SO4 and concentrated. The crude product was distilled (65° C., 0.5 torr) to provide 4-(2-Bromo-ethyl)-3,3-dimethyl-morpholine (5.4 g, 54%) as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ 3.69 (t, 2H), 3.28 (s, 2H), 3.28 (t, 2H), 2.70 (t, 2H), 2.58 (t, 2H), 0.99 (s, 6H); LC/MS found 222.02 (M++H, C8H17BrNO requires 222.05). filtered The filtrate was concentrated in vacuo the resulting oil was diluted with CH2Cl2 The solution was then washed twice with NaHCO3 (aqueous, saturated) and brine The aqueous layers were back-extracted with CH2Cl2 the combined organic layers were dried over Na2SO4 concentrated The crude product was distilled (65° C., 0.5 torr)

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

Procedure: In a pressure vessel containing 3,3-dimethylmorpholine (12.15 g, 106 mmol) in MeOH (17 mL) at −78° C. (external temperature, acetone/CO2(s)) was added ethylene oxide (6.2 mL, 125 mmol, 1.2 equiv., condensed at −78° C.). The solution was sealed and stirred over 20 hours, during which time the temperature warmed to room temperature. The reaction mixture was concentrated in vacuo and the crude product was distilled (75° C., 0.5 torr) to provide 2-(3,3-dimethyl-morpholin-4-yl)-ethanol (14 g, 82%) as a colorless oil contaminated with ˜15% of 3,3-dimethyl-morpholine. LC/MS found 160.10 (M++H, C8H18NO2 requires 160.13). The solution was sealed The reaction mixture was concentrated in vacuo the crude product was distilled (75° C., 0.5 torr)