1-[1-(4-Formylbenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril → 1-[1-(4-Hydroxymethylbenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril

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Reaction Steps

1-[1-(4-Formylbenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril (500 mg) is dissolved in methanol (10 ml) and thereto is added sodium boron hydride (63 mg) under ice cooling and the mixture is stirred for 2 hours. The solvent is concentrated and the resulting residue is purified by silica gel column chromatography (solvent: n-hexane:ethyl acetate=2:1) and recrystallized from n-hexane/ethanol to give 1-[1-(4-hydroxymethylbenzoyl)-4-piperidinyl]-3,4-dihydrocarbostyril (390 mg) as white powder, m.p.: 138°-139° C.

Provenance & Evidence