Malonic Acid → (2E)-3-(4-Fluoro-2-methoxyphenyl)-2-propenoic acid

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Reaction Steps

A solution of 4-fluoro-2-methoxybenzaldehyde (1.0 g, 6.49 mmol) and malonic acid (1.350 g, 12.98 mmol) in pyridine (10 mL) was refluxed for 16 h. After concentration the residue was taken into water. The solid was filtered, washed with water, then dried to give (E)-3-(4-fluoro-2-methoxyphenyl)acrylic acid (1.22 g, 96% yield). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.03 (d, J=16.1 Hz, 1H), 7.53 (dd, J=8.5, 6.8 Hz, 1H), 6.75-6.65 (m, 2H), 6.52 (d, J=16.1 Hz, 1H), 3.92 (s, 3H).

Provenance & Evidence