Sodium Hydroxide → 2-Chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)prop-2-en-1-yl]benzoic acid

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Reaction Steps

An aqueous solution of sodium hydroxide (1N, 3 mL, 3 mmol) was added to a solution of 2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)prop-2-en-1-yl]benzoic acid methyl ester (Example 92; 310 mg, 0.97 mmol) in methanol/tetrahydrofuran (1:1; 6 mL). The solution was stirred at room temperature overnight and then evaporated to dryness. Water (4 mL) was added and the solution was acidified with 1N hydrochloric acid solution (3.3 mL). The mixture was stirred at room temperature for 1 h, then the solid was filtered off, washed with water and dried to afford 2-chloro-4-[1-hydroxy-3-(3-hydroxyphenyl)prop-2-en-1-yl]benzoic acid (243 mg, 82% yield) as an off-white solid.

Provenance & Evidence