3-amino-N-benzylpropanamide;hydrochloride

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

Procedure: A solution of 3-tert-butoxycarbonylaminopropanoic acid (2 g, 10.6 mmol.) and HOSu (1.22 g, 10.6 mmol.) in 40 mL DCM/Dioxane (2:1) was cooled in an ice bath. To this solution was added DCC (2.4 g, 11.6 mmol.), and the mixture was stirred at room temperature for 1 h. To the resulting mixture was added benzylamine (1.7 g, 15.8 mmol.), the mixture was stirred for 4 h at room temperature. The solid that formed in the mixture was removed by filtration and washed with EtOAc. The filtrate and washings were combined and washed with 1N HCl and saturated aqueous NaHCO3. The organic layer was dried over Na2SO4, filtered and concentrated to afford 3-tert-butoxycarbonylamino-N-benzylpropionamide (2.4 g, 82%). 3-tert-Butoxycarbonylamino-N-benzylpropionamide was dissolved in cooled HCl/MeOH (20 mL) and the resulting mixture was stirred at room temperature for 1.5 h. The solvent was removed to afford 3-amino-N-benzylpropionamide hydrochloride (1.8 g, 100%). The solvent was removed

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

Procedure: To a solution of β-alanine benzyl amide HCl (80 mg, 0.36 mmol) in N-methyl morpholine (120 μi) and MC (2 mL), triphosgene (0.72 mmol) was added at room temperature. After 10 minutes, the resulted isocyanate solution was added to a suspension of the secondary amine resin obtained in above step (2) (100 mg, 0.048 mmol) and kept shaking for 3 hrs at room temperature. The resin was washed with DMF, MeOH and MC, and the completion of reaction was checked with chloranil test. obtained in above step (2) (100 mg, 0.048 mmol) The resin was washed with DMF, MeOH and MC the completion of reaction

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

Procedure: A solution of 3-tert-butoxycarbonylaminopropanoic acid (2 g, 10.6 mmol.) and HOSu (1.22 g, 10.6 mmol.) in 40 mL DCM/Dioxane (2:1) was cooled in an ice bath. To this solution was added DCC (2.4 g, 11.6 mmol.), and the mixture was stirred at room temperature for 1 h. To the resulting mixture was added benzylamine (1.7 g, 15.8 mmol.), the mixture was stirred for 4 h at room temperature. The solid that formed in the mixture was removed by filtration and washed with EtOAc. The filtrate and washings were combined and washed with 1N HCl and saturated aqueous NaHCO3. The organic layer was dried over Na2SO4, filtered and concentrated to afford 3-tert-butoxycarbonylamino-N-benzylpropionamide (2.4 g, 82%). 3-tert-Butoxycarbonylamino-N-benzylpropionamide was dissolved in cooled HCl/MeOH (20 mL) and the resulting mixture was stirred at room temperature for 1.5 h. The solvent was removed to afford 3-amino-N-benzylpropionamide hydrochloride (1.8 g, 100%). The solvent was removed