Sodium Carbonate → 1-Propanone, 1-[4-(phenylamino)-1-[2-(2-thienyl)ethyl]-4-piperidinyl]-

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Reaction Steps

A mixture of 4.1 parts of 2-thiopheneethanol, methanesulfonate ester, 3.5 parts of 1-[4-(phenylamino)-4-piperidinyl]-1-propanone, 5.3 parts of sodium carbonate and 120 parts of 4-methyl-2-pentanone is stirred and refluxed for 18 hours. After cooling to room temperature, the reaction mixture is poured onto water and the layers are separated. The organic phase is dried, filtered and evaporated. The oily residue is purified by column-chromatography over silicagel using a mixture of trichloromethane and 5% of methanol as eluent. The pure fractions are collected and the eluent is evaporated. The solid residue is crystallized from 2,2'-oxybispropane. The product is filtered off and dried, yielding 1-{4-(phenylamino)-1-[2-(2-thienyl)ethyl]-4-piperidinyl}-1-propanone; mp. 127.1° C.

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