To a solution of 2-(S)-[(5-chloro-1H-pyrrolo[2,3-b]pyridine-2-carbonyl)amino]-3-(4-fluorophenyl)propionic acid (EXAMPLE 286, 30 mg, 0.08 mmol) in DMF (3 mL) was added (R)-(+)-3-hydroxypyrrolidine (7.2 mg, 0.08 mmol), HOBt (11.2 mg, 0.08 mmol) and DIPEA (30.3 μL, 0.17 mmol). After 5 min, EDCI (20.7 mg, 0.11 mmol) was added and the reaction was stirred at rt for 16 h. The solvent was removed in vacuo and the residue partitioned between water (20 mL) and ethyl acetate (3×20 mL). The combined organic fractions were washed with 2N sodium hydroxide solution (20 mL), brine (20 mL), dried (MgSO4) and concentrated in vacuo. The crude product was triturated from methanol to give the title compound. m/z (ES+)=431 [M+H]+; RT=3.44 min.
