Benzyl Bromide → 4-Piperidinol, 2,2,6,6-tetramethyl-1-(phenylmethyl)-

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A mixture of 31.4 parts of 2,2,6,6-tetramethylpiperidin-4-ol and 17.1 parts of benzyl bromide in 125 parts of ethyl alcohol was heated under reflux conditions for 96 hours. The cooled reaction mixture was filtered to remove 2,2,6,6-tetramethylpiperidin-4-ol hydrobromide formed during the reaction and the ethyl alcohol solvent was removed by distillation under reduced pressure. Purification of the residue by chromatography on a aluminia column using chloroform as the solvent gave 1-benzyl-2,2,6,6-tetramethylpiperidin-4-ol having a melting point of 151°-2°C and the following elemental analysis by weight

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