[C:1]1([OH:11])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][CH:2]=1.C1(C)C=CC(S(O[CH2:22][CH2:23][O:24][CH2:25][CH2:26][O:27][CH3:28])(=O)=O)=CC=1.C(=O)([O-])[O-].[K+].[K+].O>CS(C)=O.C1(C)C=CC=CC=1>[CH3:28][O:27][CH2:26][CH2:25][O:24][CH2:23][CH2:22][O:11][C:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][CH:2]=1In 110 g of dimethyl sulfoxide were dispersed 21.6 g (0.15 mol) of 1-naphthol, 27.4 g (0.1 mol) of 2-(2-methoxy-ethoxy)ethyl 4-toluenesulfonate, and 20.7 g (0.15 mol) of potassium carbonate. The dispersion was heated and stirred at 80° C. for 3 hours. After cooling, the solution was combined with 200 g of water and 200 g of toluene, from which an organic layer was separated. It was washed 2 times with 50 g of water, 5 times with 2.5 wt % sodium hydroxide aqueous solution and then 4 times with 100 g of water. The organic layer was concentrated, obtaining 21 g of oily matter. On vacuum distillation (120° C./0.06 Torr), 18.6 g of the target compound was recovered (yield 75%).
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