反应详情

A solution of 2-amino-5-chlorobenzoic acid (0.58 g, 3.37 mmol) in DMF (7.0 mL) was reacted with (L)-4-bromophenylalanine methyl ester hydrochloride (1.00 g, 3.37 mmol), HBTU (1.20 g, 3.37 mmol), and DIEA (1.80 mL, 10.13 mmol) by the general procedure A. The crude product was purified by flash column chromatography on silica gel using DCM (+50% hexane) followed by DCM to give 0.890 g (64%) of 2-(2-amino-5-chloro-benzoylamino)-3-(4-bromo-phenyl)-propionic acid methyl ester as a white solid. A solution of 2-(2-amino-5-chloro-benzoylamino)-3-(4-bromo-phenyl)-propionic acid methyl ester (0.600 g, 1.45 mmol) in DME (10.0 mL) was reacted with 4-trifluoromethylbenzene boronic acid (0.55 g, 2.91 mmol), Pd(PPh3)4 (0.70 g, 0.14 mmol), and Na2CO3 (2.0 N, 3.50 mL, 3.64 mmol) by the general procedure D to form 0.850 g of 2-(2-amino-5-chloro-benzoylamino)-3-(4′-trifluoromethyl-biphenyl-4-yl)-propionic acid methyl ester as a brown oil.