Hydrochloric Acid → HCID 178451126, 화합물

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(R)-3-[N-(5′-Chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-hydroxy-isoxazole-5-carbonyl)-hydrazino]-2-hydroxy-2-methyl-propionic acid ethyl ester (100 mg, 0.2 mmol) was dissolved in isobutyl alcohol (6 mL, 60 mmol), followed by the addition of 4 M HCl in dioxane (1 mL, 4 mmol). The resulting mixture was stirred at room temperature for 8 hours, then evaporated under reduced pressure and purified by preparative HPLC. The clean fractions were combined and lyophilized to yield the title compound (52 mg, 100% purity). MS m/z [M+H]+ calc'd for C25H27ClFN3O6, 520.16; Found 520.2.

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