Reaktion #171388

Reaktionsgleichung

(R)-3-[N-(5′-Chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-hydroxy-isoxazole-5-carbonyl)-hydrazino]-2-hydroxy-2-methyl-propionic acid ethyl ester

isobutyl alcohol

HCl

dioxane

→

title compound

Ausbeute 100.0%

(R)-3-[N-(5′-Chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-hydroxy-isoxazole-5-carbonyl)-hydrazino]-2-hydroxy-2-methyl-propionic acid isobutyl ester

Ausbeute 100.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeevaporated under reduced pressure
2. 2
   Sonstigepurified by preparative HPLC

Vorschrift

(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.

Quelle