1,2-Dichloroethane → (R)-3-[N-(5'-Chloro-2'-fluorobiphenyl-4-ylmethyl)-N'-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionic acid 2,2,3,3,3-pentafluoropropyl Ester

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Reaction Steps

(R)-3-[N-(5′-Chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionic acid (20 mg, 43 μmol), EDC (40.16 mg, 0.2587 mmol), and HOBt hydrate (39.62 mg, 0.2587 mmol) were combined in DCM (0.5 mL, 8 mmol) and stirred at room temperature. After 10 minutes, 2,2,3,3,3-pentafluoro-1-propanol (51.8 mg, 345 μmol) was added. The resulting mixture was stirred at room temperature overnight to yield the title compound (5.9 mg, purity 100%) as a TFA salt. MS m/z [M+H]+ calc'd for C24H20ClF6N3O6, 596.09. found 596.

Provenance & Evidence