Ethyl 4-[4-(4-benzyl-piperazin-1-yl)-piperidin-1-yl]-butanoate → Ethyl 4-(4-piperazin-1-yl-piperidin-1-yl)-butanoate

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Reaction Steps

A suspension of 2.9 g (7.76 mmol) ethyl 4-[4-(4-benzyl-piperazin-1-yl)-piperidin-1-yl]-butanoate and 300 mg 10% Pd/C in 60 mL MeOH was hydrogenated at RT and 50 psi hydrogen pressure for 24 h. The catalyst was filtered off, the mixture was evaporated down i.vac., the residue was taken up in a little DIPE and isopropanol and combined with 4 M HCl in 1,4-dioxane. The precipitated bis-hydrochloride salt was separated off and dried.

Provenance & Evidence