30 min at -15 °C, about 60% of the S02 was removed. The liquid was stirred into diethyl ether, the ether was decanted, and acetone was added to yield upon filtration 29 g (85%) of 15.Preparation of 15 in CH2C12. To 70 g of CH2C12 and 20 g (0.23 mol) of THT at -30 °C was added 14 g (0.40 mol) of chlorine followed by addition of 18.1 g (0.17 mol) of styrene. After 30 min, the solution was stirred into ether, the ether was decanted, and acetone was added to give 4.2 g (9.2%) of 15: 60-MHz 1H NMR (D20) 7.

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