tert-butyl 3-carbamoylmorpholine-4-carboxylate

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

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

Procedure: 1,1-Dimethylethyl 3-(aminocarbonyl)morpholine-4-carboxylate (0.48 g, 2.085 mmol) was taken up in 4 M HCl in dioxane (5 mL, 10.00 mmol) and maintained at room temperature overnight. The solvent was removed in vacuo to afford the title compound as a pale yellow solid. The solvent was removed in vacuo

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

Procedure: 4-{[(1,1-Dimethylethyl)oxy]carbonyl}morpholine-3-carboxylic acid (0.5 g, 2.162 mmol), ammonium chloride (0.347 g, 6.49 mmol), EDC (0.622 g, 3.24 mmol), HOBt (0.993 g, 6.49 mmol) and DIPEA (1.699 mL, 9.73 mmol) were stirred in DMF (10 mL) at room temperature overnight. Saturated NaHCO3 was then added and the mixture was extracted with EtOAc (2×). The combined organic extracts were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo to give the title compound as a yellow gum. the mixture was extracted with EtOAc (2×) The combined organic extracts were washed with brine dried over MgSO4 filtered concentrated in vacuo

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

Procedure: 1,1-Dimethylethyl 3-(aminocarbonyl)morpholine-4-carboxylate (0.48 g, 2.085 mmol) was taken up in 4 M HCl in dioxane (5 mL, 10.00 mmol) and maintained at room temperature overnight. The solvent was removed in vacuo to afford the title compound as a pale yellow solid. The solvent was removed in vacuo

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

Procedure: 4-{[(1,1-Dimethylethyl)oxy]carbonyl}morpholine-3-carboxylic acid (0.5 g, 2.162 mmol), ammonium chloride (0.347 g, 6.49 mmol), EDC (0.622 g, 3.24 mmol), HOBt (0.993 g, 6.49 mmol) and DIPEA (1.699 mL, 9.73 mmol) were stirred in DMF (10 mL) at room temperature overnight. Saturated NaHCO3 was then added and the mixture was extracted with EtOAc (2×). The combined organic extracts were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo to give the title compound as a yellow gum. the mixture was extracted with EtOAc (2×) The combined organic extracts were washed with brine dried over MgSO4 filtered concentrated in vacuo

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

Procedure: 4-{[(1,1-Dimethylethyl)oxy]carbonyl}morpholine-3-carboxylic acid (0.5 g, 2.162 mmol), ammonium chloride (0.347 g, 6.49 mmol), EDC (0.622 g, 3.24 mmol), HOBt (0.993 g, 6.49 mmol) and DIPEA (1.699 mL, 9.73 mmol) were stirred in DMF (10 mL) at room temperature overnight. Saturated NaHCO3 was then added and the mixture was extracted with EtOAc (2×). The combined organic extracts were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo to give the title compound as a yellow gum. the mixture was extracted with EtOAc (2×) The combined organic extracts were washed with brine dried over MgSO4 filtered concentrated in vacuo

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

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

Procedure: A solution of the product of Step 2 (1 eq.) and triethylamine (2.1 eq.) in CH2Cl2 (0.1 M) was cooled to 0° C. and trifluoroacetic anhydride (1.1 eq.) added dropwise under nitrogen. Stirring was continued 3.5 hours more at room temperature and volatiles removed in vacuo. Residues taken in EtOAc were washed with water, brine and dried over Na2SO4. Evaporation gave the title compound as a brown solid. volatiles removed in vacuo were washed with water, brine dried over Na2SO4 Evaporation

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

Procedure: To a stirred solution of the compound prepared in Step 1 (1 eq.), pyridine (0.6 eq.) and di-t-butyl dicarbonate (1.3 eq.) in dioxane (0.6 M), NH4HCO3 (1.26 eq.) was added and the mixture was stirred at room temperature for 20 hours. Mixture was concentrated, taken up in EtOAc and washed with water and brine. Organics were dried over Na2SO4 and evaporated giving the title product as an oil which crystallized at room temperature. Mixture was concentrated washed with water and brine Organics were dried over Na2SO4 evaporated

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

Procedure: A solution of the product of Step 2 (1 eq.) and triethylamine (2.1 eq.) in CH2Cl2 (0.1 M) was cooled to 0° C. and trifluoroacetic anhydride (1.1 eq.) added dropwise under nitrogen. Stirring was continued 3.5 hours more at room temperature and volatiles removed in vacuo. Residues taken in EtOAc were washed with water, brine and dried over Na2SO4. Evaporation gave the title compound as a brown solid. volatiles removed in vacuo were washed with water, brine dried over Na2SO4 Evaporation

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

Procedure: To a stirred solution of the compound prepared in Step 1 (1 eq.), pyridine (0.6 eq.) and di-t-butyl dicarbonate (1.3 eq.) in dioxane (0.6 M), NH4HCO3 (1.26 eq.) was added and the mixture was stirred at room temperature for 20 hours. Mixture was concentrated, taken up in EtOAc and washed with water and brine. Organics were dried over Na2SO4 and evaporated giving the title product as an oil which crystallized at room temperature. Mixture was concentrated washed with water and brine Organics were dried over Na2SO4 evaporated

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

Procedure: A solution of the product of Step 2 (1 eq.) and triethylamine (2.1 eq.) in CH2Cl2 (0.1 M) was cooled to 0° C. and-trifluoroacetic anhydride (1.1 eq.) added dropwise under nitrogen. Stirring was continued 3.5 hours more at room temperature and volatiles removed in vacuo. Residues taken in EtOAc were washed with water, brine and dried over Na2SO4. Evaporation gave the title compound as a brown solid. volatiles removed in vacuo were washed with water, brine dried over Na2SO4 Evaporation