5-(p-Ethoxycarbonylphenyl)-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine → 4-(5,6,7,8-Tetrahydroimidazo[1,5-a]pyridin-5-yl)benzoic acid

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Reaction Steps

A solution of 0.66 g of 5-(p-ethoxycarbonylphenyl)-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine in 8.0 ml of ethanol and 8.0 ml 1N sodium hydroxide is refluxed for 3 h, cooled and evaporated. The residue is partitioned between water and ethyl acetate. The aqueous phase is adjusted to pH 5 with concentrated sulfuric acid and the solid is filtered and air-dried to yield the title compound, m.p. 309°-310° (dec.).

Provenance & Evidence