benzyl (2S,4S)-2-carbamoyl-4-fluoropyrrolidine-1-carboxylate

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

Procedure: A stirred solution of (4S)-I-[(Benzyloxy)carbonyl]-4-fluoro-L-proline in dioxane was treated with pyridine-(0.7 eq.) and Boc2O (1.3 eq.), then ammonium bicarbonate (1.26 eq.) was added and the mixture was stirred at room temperature for 15 hours. Dioxane was concentrated and the residue was taken up in ethyl acetate, washed with 1 N HCl and brine, dried over Na2SO4 to give, after filtration and concentration, title compound. Dioxane was concentrated washed with 1 N HCl and brine dried over Na2SO4 to give after filtration and concentration, title compound

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

Procedure: Benzyl-(2S,4S)-2-aminocarbonyl-4-fluoropyrrolidine-1-carboxylate in dichloromethane was treated at 0° C. with Et3N (2.1 eq.) and trifluoroacetic anhydride was added dropwise. was added dropwise

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

Procedure: A stirred solution of (4S)-1-[(Benzyloxy)carbonyl]-4-fluoro-L-proline in dioxane was treated with pyridine (0.7 eq.) and Boc2O (1.3 eq.), then ammonium bicarbonate (1.26 eq.) was added and the mixture was stirred at room temperature for 15 hours. Dioxane was concentrated and the residue was taken up in ethyl acetate, washed with 1 N HCl and brine, dried over Na2SO4 to give, after filtration and concentration, title compound. Dioxane was concentrated washed with 1 N HCl and brine dried over Na2SO4 to give after filtration and concentration, title compound

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

Procedure: Benzyl-(2S,4S)-2-aminocarbonyl-4-fluoropyrrolidine-1-carboxylate in dichloromethane was treated at 0° C. with Et3N (2.1 eq.) and trifluoroacetic anhydride was added dropwise. was added dropwise

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

Procedure: A stirred solution of (4S)-1-[(Benzyloxy)carbonyl]-4-fluoro-L-proline in dioxane was treated with pyridine (0.7 eq.) and Boc2O (1.3 eq.), then ammonium bicarbonate (1.26 eq.) was added and the mixture was stirred at room temperature for 15 hours. Dioxane was concentrated and the residue was taken up in ethyl acetate, washed with 1 N HCl and brine, dried over Na2SO4 to give, after filtration and concentration, title compound. Dioxane was concentrated washed with 1 N HCl and brine dried over Na2SO4 to give after filtration and concentration, title compound

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

Procedure: Benzyl-(2S,4S)-2-aminocarbonyl-4-fluoropyrrolidine-1-carboxylate in dichloromethane was treated at 0° C. with Et3N (2.1 eq.) and trifluoroacetic anhydride was added dropwise. was added dropwise

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

Procedure: Benzyl-(2S,4S)-2-aminocarbonyl-4-fluoropyrrolidine-1-carboxylate in dichloromethane was treated at 0° C. with Et3N (2.1 eq.) and trifluoroacetic anhydride was added dropwise. was added dropwise

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

Procedure: A stirred solution of (4S)-1-[(Benzyloxy)carbonyl]-4-fluoro-L-proline in dioxane was treated with pyridine (0.7 eq.) and Boc2O (1.3 eq.), then ammonium bicarbonate (1.26 eq.) was added and the mixture was stirred at room temperature for 15 hours. Dioxane was concentrated and the residue was taken up in ethyl acetate, washed with 1 N HCl and brine, dried over Na2SO4 to give, after filtration and concentration, title compound. Dioxane was concentrated washed with 1 N HCl and brine dried over Na2SO4 to give after filtration and concentration, title compound