Hydrochloric Acid → 4-[1-Hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-alpha-(hydroxymethyl)-alpha-methyl-benzeneacetic Acid

Participants

Reaction Steps

Dissolve 4-[1-hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-α-(hydroxymethyl)-α-methyl-benzeneacetic acid, ethyl ester (200 mg, 0.37 mmol) in methanol (8 mL) and tetrahydrofuran (12 mL). Add 1.6 mL (1.6 mmol) of a 1 molar solution of aqueous sodium hydroxide. After 4 hours, cool the solution to room temperature and add 10% hydrochloric acid (ca. 1 mL) dropwise until pH is 5-6. Concentrate the solution and purify by flash chromatography (50 g of silica gel, methanol/chloroform gradient elution) to give the title compound (127 mg, 66%). Additionally, the following compounds can be prepared by the synthetic procedure depicted in Step J:

Provenance & Evidence