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A solution of 5.4 g (44 mmol) of thioanisole and 4.89 g (43.6 mmol) of 1,4-diazabicyclo[2,2,2]-octane in 44 ml of tetrahydrofuran was placed in an oven-dried flask and cooled to 0° C. A 2.5M solution of butyl lithium in hexane (17.4 ml, 43.6 mmol) was added with stirring and the mixture allowed to warm to room temperature and react for about 1 hour to form phenylthiomethyl lithium. A solution of 3.14 g (8.71 mmol) of 1-(2-methoxymethoxyphenyl)-1-(3,4-dimethoxy-2-methoxymethoxyphenyl)ethene in tetrahydrofuran was added and the mixture heated to reflux with stirring under an argon atmosphere. After 10 hours another 21.8 mmol of phenylthiomethyl lithium was prepared and added to the mixture and refluxing was continued overnight. The mixture was then cooled and poured into 200 ml of 5 percent aqueous sodium hypochlorite solution and 200 g of ice and 150 ml of ether added. The organic phase was separated, dried over magnesium sulfate and concentrated by evaporation under reduced pressure to obtain 6.61 g of an oil. This was purified by silica gel chromatography (80 mm×3" filter funnel), eluting with hexane containing ever increasing amounts of ether to obtain 1.16 g of the title compound as an oil. The proton and carbon NMR and infrared spectra were consistent with the assigned structure.

1. temperatureto warm to room temperature
2. customreact for about 1 hour