Step (a) Morpholine (10 mL) was added to a flask charged with the (9H-fluoren-9-yl)methyl (3S,5S)-1-(2-(1H-1,2,4-triazol-1-yl)acetyl)-5-(4-(4-fluorophenoxy)phenylcarbamoyl)pyrrolidin-3-ylcarbamate (0.859 g, 1.33 mmol), prepared as in prepared as in Example 1, and DMF (10 mL). The reaction mixture was stirred at ambient temperature for 30 minutes and then diluted with deionized water (20 mL). The dilution was extracted with ethyl acetate (60 mL) and the extract was washed with brine (30 mL), dried over anhydrous sodium sulfate, filtered and concentrated to give (2S,4S)-1-(2-(1H-1,2,4-triazol-1-yl)acetyl)-4-amino-N-(4-(4-fluorophenoxy)phenyl)pyrrolidine-2-carboxamide (0.465 g, 1.10 mmol), which was carried forward without further purification.
