Monoethyl malonate → (R)N-[1-(4-Bromo-phenyl)-ethyl]-malonamic Acid Ethyl Ester

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To a magnetically stirred solution of (R)-(+)-1-(4-bromophenyl)ethylamine (0.51 g, 2.55 mmol) in anhydrous CH2Cl2 under argon and cooled to 0° C., were added ethyl hydrogen malonate (0.4 g, 3.06 mmol) EDC.HCl (0.58 g, 3.06 mmol) and HOBt (0.41 g, 3.06 mmol). The resulting solution was stirred at 25° C. overnight. CH2Cl2 was evaporate and residue partitioned between EtOAC and 1 N HCl. The organic layer was washed with H2O, brine and dried over Na2SO4. The solvent was removed in vacuo and the residue was purified by flash column chromatography (40% EtOAc in hexanes) to provide the desired product (0.57 g, 71%) as a white solid.

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