Sodium Hydroxide → HCID 14969529, compound

Participants

Reaction Steps

1-[1-(4-Methoxycarbonylbenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril (6.33 g) and sodium hydroxide (1.94 g) are dissolved in methanol (100 ml) and the mixture is stirred at room temperature overnight. After the solvent is concentrated, water is added to the residue and the mixture is extracted with diethyl ether. The aqueous layer is adjusted to pH 1 by adding conc. hydrochloric acid and extracted with ethyl acetate. The extract is dried with magnesium sulfate, concentrated and recrystallized from n-hexane/ethanol to give 1-[1-(4-carboxybenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril (4.5 g) as white powder, m.p.: 232°-235° C.

Provenance & Evidence