[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6][OH:7])=[CH:4][CH:3]=1.C1(C)C=CC=CC=1.Cl.Cl[CH2:19][CH2:20][N:21]1[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]1>[OH-].[Na+].[Br-].C([N+](CC)(CC)CC)C1C=CC=CC=1>[N:21]1([CH2:20][CH2:19][O:1][C:2]2[CH:9]=[CH:8][C:5]([CH2:6][OH:7])=[CH:4][CH:3]=2)[CH2:26][CH2:25][CH2:24][CH2:23][CH2:22]1
4-hydroxybenzyl alcohol (6.2 g, 0.0.05 mol) was dissolved in aqueus sodium hydroxide (SN, 30 mL). Toluene (30 mL) was added followed by 1-(2-chloroethyl) piperidine hydrochloride (9.29 g, 0.05 mol) and benzyltriethylammonium bromide (0.3 g). The reaction mixture was heated with vigorous stirring for 1.5 h. The layers were separated, the aqueous layer was extracted with toluene (2×15 mL). Combined organic extracts and organic layer was washed with water (50 mL), brine (50 mL), dried over sodium sulfate, and concentrated on a rotary evaporator to give 8.725 g (75%) of alcohol (3a) as a yellowish brown oil.
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