(2S,5R)-1-(2-chloroacetyl)-5-prop-1-ynylpyrrolidine-2-carboxamide

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

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+. evaporated The residue was diluted with dichloromethane washed with H2O (2×) dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash chromatography (10% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to ˜pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to ˜pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

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

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+. evaporated The residue was diluted with dichloromethane washed with H2O (2×) dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash chromatography (10% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

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

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+. evaporated The residue was diluted with dichloromethane washed with H2O (2×) dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash chromatography (10% ethyl acetate/hexane)

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

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL ) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+. evaporated The residue was diluted with dichloromethane washed with H2O (2×) dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash chromatography (10% ethyl acetate/hexane)

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

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-prolinamide (0.28 g, 1.23 mmol) and imidazole (0.084 g, 1.23 mmol) in dry pyridine (6 mL) at −35° C. under nitrogen was added POCl3 (0.23 mL, 2.46 mmol) dropwise. The reaction mixture was stirred between −35° C. to −15° C. for 1 hour and evaporated. The residue was diluted with dichloromethane and washed with H2O (2×), dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash chromatography (10% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 211 (M+H)+. evaporated The residue was diluted with dichloromethane washed with H2O (2×) dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash chromatography (10% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to ˜pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)

Conditions: temp:-15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (5R)-1-(chloroacetyl)-5-propynyl-L-proline (1.10 g, 4.8 mmol) in CH2Cl2 (24 mL) at −15° C. under nitrogen was added 4-methylmorpholine (0.64 mL, 5.76 mmol), and then isobutyl chloroformate (0.81 mL, 6.24 mmol) over 10 minutes. A white precipitate formed. The reaction mixture was stirred at −15° C. under nitrogen for 30 minutes, and a solution of NH3 in dioxane (0.5 M, 29 mL, 14.4 mmol) was added. The reaction mixture was stirred at −15° C. for 30 minutes, warmed to room temperature, and stirred at that temperature for 16 hours. The reaction mixture was diluted with 1M HCl to ˜pH 4 and extracted with ethyl acetate (3×). The extracts were combined, washed with brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (60-75% ethyl acetate/hexane) provided the titled compound. MS (DCI) m/z 229 (M+H)+. A white precipitate formed The reaction mixture was stirred at −15° C. for 30 minutes warmed to room temperature stirred at that temperature for 16 hours extracted with ethyl acetate (3×) washed with brine dried (Na2SO4) filtered concentrated under reduced pressure Purification by flash column chromatography (60-75% ethyl acetate/hexane)