Lithium Hydroxide → 2-Methoxy-4-(1-acetyl-4-piperidyloxy)phenylacetic acid

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Reaction Steps

Methyl 2-methoxy-4-(1-acetyl-4-piperidyloxy)phenylacetate (0.18 g, 0.56 mmol) was dissolved in THF (5 ml) and treated with lithium hydroxide (0.67 ml of a 1M aqueous solution, 0.67 mmol). The mixture was stirred at ambient temperature for 4 hours, then treated with an additional 0.2 ml of 1M lithium hydroxide. The mixture was heated at 60° for 6 hours, then cooled and concentrated in vacuo. The residue was acidified with 1M HCl, and extracted with ethyl acetate. The combined ethyl acetate layers were extracted with saturated aqueous sodium carbonate. The combined sodium carbonate layers were acidified with concentrated HCl and extracted with ethyl acetate. The combined ethyl acetate layers were dried over sodium sulfate, filtered, and evaporated to dryness in vacuo to give 2-methoxy-4-(1-acetyl-4-piperidyloxy)phenyl-acetic acid.

Provenance & Evidence