Acetic Anhydride → (S)-2-(2-(1H-1,2,4-triazol-1-yl)acetamido)-5-acetamido-N-(4-(4-fluorophenoxy)phenyl)pentanamide

Participants

Reaction Steps

Step (b) DIEA (0.10 mL, 0.57 mmol) and acetic anhydride (0.025 mL, 0.27 mmol) was added to (S)-2-(2-(1H-1,2,4-triazol-1-yl)acetamido)-5-amino-N-(4-(4-fluorophenoxy)phenyl)pentanamide (115 mg, 0.269 mmol) in THF (5 mL). The reaction mixture was stirred for 2 hours and then concentrated. Product was purified from the residue by reverse phase HPLC to give Compound 254, (S)-2-(2-(1H-1,2,4-triazol-1-yl)acetamido)-5-acetamido-N-(4-(4-fluorophenoxy)phenyl)pentanamide (34 mg, 0.073 mmol, 27%) as an off-white solid. 1H-NMR (400 MHz, DMSO-d6): 10.21 (s, 1H), 8.75-8.73 (m, 1H), 8.47 (s, 1H), 7.85-7.82 (m, 1H), 7.63-7.58 (m, 2H), 7.24-7.18 (m, 2H), 7.04-6.92 (m, 4H), 4.99 (s, 2H), 4.46-4.38 (m, 1H), 3.12-3.01 (m, 2H), 1.80 (s, 3H), 1.79-1.37 (m, 4H). MS (EI) for C23H25FN6O4. found 469.1 (MH+).

Provenance & Evidence