Sodium Hydroxide → HCID 12788532, compound

Participants

Reaction Steps

A mixture of 3.84 g of trans-4-(3-chlorophenoxy)-1-ethoxy-carbonyl-3-phenylpiperidine of Example 33, 55 ml of absolute ethanol, and 28 ml of 10% aqueous NaOH solution is refluxed for 18 hours under nitrogen. The ethanol is then removed in vacuo and the aqueous residue is extracted with ether. The combined ether extracts are washed with saturated aqueous NaCl solution, dried over anhydrous MgSO4, and concentrated in vacuo to an oil. This oil is dissolved in ether, filtered, and the filtrate treated with HCl-saturated ether solution until acidic to wet pH paper. The resulting precipitate is filtered, washed with ether and dried to afford a solid, m.p. 239°-241° C. Recrystallization from isopropanol affords crystals of trans-4-(3-chlorophenoxy)-3-phenylpiperidine hydrochloride, mp s 240°, 241.5°-243.5° C.

Provenance & Evidence