[CH2:1]([C:3]1([CH3:14])[CH:8]([CH3:9])[CH:7]([OH:10])[CH2:6][C:5]([CH2:12][CH3:13])([CH3:11])[NH:4]1)[CH3:2].[H-].[Na+].[CH2:17](Cl)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1>C1(C)C=CC=CC=1>[CH2:17]([O:10][CH:7]1[CH2:6][C:5]([CH2:12][CH3:13])([CH3:11])[NH:4][C:3]([CH2:1][CH3:2])([CH3:14])[CH:8]1[CH3:9])[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1To a solution of 3.0 g of 2,6-diethyl-2,3,6-trimethyl-4-piperidinol (Compound 1) in 30 ml of dry toluene was added, at 0°-5° C., 0.65 g of sodium hydride (purity 52.9%). The mixture was refluxed by heating for 6 hours. After cooling the mixture, 1.9 g of benzyl chloride were added dropwise at 0°-5° C. and the resulting mixture was refluxed by heating for 4 hours. The reaction mixture was then washed with water and dried over anhydrous magnesium sulphate; the solvent was then distilled off. The residue was purified by column chromatography on silica gel using benzene as eluent, followed by distillation under reduced pressure. There were obtained 2.1 g of Compound 95 as a pale yellow oil (bp 120°-124° C./0.2 mmHg).
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