The primary amino group of 4-(aminomethyl)piperidine (I) was protected by conversion to the phthalimide (III) upon heating with phthalic anhydride (II). After coupling of piperidine (III) with 1-naphthylacetic acid (IV) to give amide (V), hydrazinolysis of the phthalimido group of (V) liberated the primary amine (VI). Alkylation of (VI) with N-(4-bromobutyl)phthalimide (VII) furnished the secondary amine (VIII), which was further protected with a tert-butoxycarbonyl group to provide (IX). The phthaloyl group of (IX) was then removed by hydrazinolysis, yielding amine (X). This was subjected to reductive alkylation with cyclohexanecarboxaldehyde (XI) in the presence of NaBH4 to afford the cyclohexylmethyl amine (XII). After purification as the di-Boc derivative, acid cleavage of the tert-butyl carbamate groups provided the title compound.