Benzoic acid, 4-(2-carboxyethenyl)-, methyl ester → 3-(4-(Methoxycarbonyl)phenyl)propanoic acid

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Reaction Steps

To a solution of 4-methoxycarbonylcinnamic acid (4.64 g) in acetic acid (300 ml) is added 10% palladium-carbon (0.5 g), and the mixture is subjected to hydrogenation at 70° C. under atmospheric pressure for two hours. The catalyst is removed by filtration, and the filtrate is concentrated under reduced pressure. To the residue is added water, and the precipitated white powder is collected by filtration to give 3-(4-methoxycarbonylphenyl)propionic acid (3.87 g).

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