5-(3,4-Dimethoxy-5-chlorophenyl)-2,4-pentadienoic acid → 5-(3,4-Dimethoxy-5-chlorophenyl)pentanoic acid

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Reaction Steps

A solution containing 6.2 g of the above product obtained in Example 32 wasdissolved in a mixture of 30 ml of acetic acid and 3 ml of conc. hydrochloric acid. Palladium on charcoal catalyst (10% Pd) was added and the mixture was hydrogenated at normal pressure and room temperature. After filteration the solvents were evaporated in vacuo. Yield 3.2 g (55%), a viscous oil.

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