[Br:1][C:2]1[CH:10]=[CH:9][C:5](NCC)=[CH:4][CH:3]=1.[C:11]([NH:18][CH2:19][C:20]([OH:22])=O)([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12].Cl.[CH2:24]([N:26]=C=NCCCN(C)C)[CH3:25].C(=O)([O-])O.[Na+]>N1C=CC=CC=1.C(OCC)(=O)C>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([CH:19]([NH:18][C:11](=[O:12])[O:13][C:14]([CH3:15])([CH3:16])[CH3:17])[C:20]([NH:26][CH2:24][CH3:25])=[O:22])=[CH:9][CH:10]=1
To a solution of 4-bromo-N-ethylaniline (1.28 g, 6.4 mmol), N-Boc-glycine (1.57 g, 9.0 mmol) in pyridine (10 ml) was added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (1.47 g, 7.7 mmol) at 0° C. The reaction mixture was stirred at room temperature for 4 hrs. The reaction mixture was poured into a mixture of diluted aqueous sodium hydrogen carbonate solution and ethyl acetate. The mixture was stirred, stood still and partitioned. The aqueous layer was extracted with ethyl acetate. The combined organic layer was washed with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure to give tert-butyl [(4-bromophenyl)(ethyl)aminocarbonylmethyl]carbamate (2.255 g, yield 99%) as a yellow solid.
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