Lithium Hydroxide → 2,6-dimethyl-7-oxo-1-(1-phenylethyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridine-3-carboxylic acid

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Reaction Conditions

Reaction Steps

A mixture of ethyl 2,6-dimethyl-7-oxo-1-(1-phenylethyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridine-3-carboxylate (500 mg, 1.5 mmol) and lithium hydroxide (50 mg, 2.1 mmol) in ethanol (20 mL) and water (5 mL) was stirred and heated at 80° C. for 12 hours. Once starting material was consumed, the mixture was concentrated and the residue was dissolved into water (50 mL). Then the solution was extracted with ethyl acetate (20 mL×2). The aqueous layer was collected, adjusted to pH 4, and extracted with ethyl acetate (20 mL×3). The combined organic layers were washed with brine (20 mL×2), dried over anhydrous sodium sulfate, filtered and concentrated to give 2,6-dimethyl-7-oxo-1-(1-phenylethyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridine-3-carboxylic acid (200 mg, 44%) as a light yellow solid which was used directly in the next step without further purification. LRMS (M+H+) m/z: calcd 310.13. found 310.

Provenance & Evidence