Cl.[Cl:2][C:3]1[CH:4]=[C:5]([CH2:9][CH2:10][NH2:11])[CH:6]=[CH:7][CH:8]=1.[CH3:12]CN(CC)CC.Cl[C:20]([O:22][CH3:23])=[O:21]>C(Cl)Cl>[CH3:23][O:22][C:20](=[O:21])[NH:11][CH2:10][CH:9]([C:5]1[CH:6]=[CH:7][CH:8]=[C:3]([Cl:2])[CH:4]=1)[CH3:12]To a solution of 2-(3-chloro-phenyl)-ethylamine hydrochloride (6.22 g, 30.2 mmol) and Et3N (6.1 g, 60.4 mmol) in DCM (20 mL) was added methyl chloroformate (4.28 g, 45 mmol) dropwise at 0° C., and the resulting mixture was stirred at room temperature for 0.5 hour. The reaction mixture was then washed with water (3×10 mL), 1N HCl (10 mL) and brine (10 mL). The organic layer was dried over anhy. Na2SO4, filtered and concentrated in vacuo. The residue formed was dried in vacuo to give the title compound (5.5 g, 80%) as yellow oil. MS: 228.1 (M+H+).
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