dimethyl 2-benzamidobutanedioate

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

Procedure: A mixture of benzoyl chloride (3.20 mL, 27.7 mmol), L-aspartic acid dimethyl ester (5.0 g, 25.2 mmol) and triethyl amine (5.3 mL, 38 mmol) in CH2Cl2 (50 mL) was stirred at ambient temperature for 2 h and diluted with water. The organic layer was dried (MgSO4), filtered, and concentrated. The residue was purified by silica gel chromatography (hexanes/EtOAc 1/1) to afford a white solid (5.3 g, 79%). MS (ESI) m/z 266 (M+H)+. The organic layer was dried (MgSO4) filtered concentrated The residue was purified by silica gel chromatography (hexanes/EtOAc 1/1)