(2S,4S)-4-(2-([1,2,4]triazolo[4,3-a]pyridin-3-yl)quinolin-8-yloxy)-1-(tert-butoxycarbonyl)piperidine-2-carboxylic acid (Example 53; 0.100 g, 0.204 mmol), EDCI (0.0548 g, 0.286 mmol) and HOBT (0.0373 g, 0.276 mmol) were mixed in CH2Cl2 (2.5 mL) and the mixture was cooled to 0° C. Triethylamine (0.0712 mL, 0.511 mmol) was added and the mixture stirred for 15 minutes. Dimethylamine (0.153 mL, 0.306 mmol, 2.0M in THF) was added, and the mixture was warmed to ambient temperature and stirred for 5.0 hours. The mixture was diluted with EtOAc (20 mL) and washed with 1N KHSO4 (2×10 mL), followed by saturated aqueous NaHCO3, and brine. The organics were dried over MgSO4, filtered and concentrated, then purified by column chromatography (1 to 5% MeOH/CH2Cl2) to afford 0.080 g (75%) of the desired product.
