Hydrochloric Acid → 3-[4-({4-[(3,5-di-tert-butyl-1H-pyrazol-1-yl)methyl]benzyl}oxy)-2-fluorophenyl]propanoic acid

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Reaction Conditions

Reaction Steps

A mixture of ethyl 3-[4-({4-[(3,5-di-tert-butyl-1H-pyrazol-1-yl)methyl]benzyl}oxy)-2-fluorophenyl]propanoate (0.73 g, 1.6 mmol), 1 N aqueous sodium hydroxide solution (3.0 mL), tetrahydrofuran (6 mL) and methanol (6 mL) was stirred at 60° C. for 1 hr. 1 N Hydrochloric acid (3.0 mL) was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract washed with aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained solid was recrystallized from ethyl acetate-hexane to give the title compound (0.61 g, yield 81%) as colorless crystals. melting point 152-153° C., 1H NMR (CDCl3) δ: 1.26 (9H, s), 1.31 (9H, s), 2.55-2.66 (2H, m), 2.83-2.95 (2H, m), 4.96 (2H, s), 5.48 (2H, s), 5.92 (1H, s), 6.56-6.67 (2H, m), 6.84-6.94 (2H, m), 7.00-7.14 (1H, m), 7.26-7.34 (2H, m).

Provenance & Evidence