Methanol → HCID 10165356, compound

Participants

Reaction Steps

To 350 mL of methanol in a 1 L round bottom flask equipped with a mechanical stirrer is added 5.3 g (9.8 mmol) of methyl 4-[4-[4-(bis(4-methylphenyl)hydroxymethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetate, prepared in accordance with Example 10, 5.1 g (0.13 mol) of solid sodium hydroxide, and 100 mL of water. The mixture is heated to reflux for 3 hr. After cooling, the methanol is removed in vacuo, and 6 N hydrochloric acid is added dropwise until the solution was no longer basic (pH=7). The solution is extracted three times with ethyl acetate. The organic layers are combined, and precipitation is induced. The solid is washed with ether to provide 4-[4-[4-(bis(4-methylphenyl)hydroxymethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetic acid, as the dihydrate.

Provenance & Evidence