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To a solution of 11C (100 mg) in dichloromethane, cooled to 0° C., was added a solution of boron tribromide in dichloromethane (1M, 0.76 ml). This solution was stirred at 0° C. for 4 hours, then allowed to stand at 4° C. an additional 16 hrs. The solution was then poured into a saturated sodium bicarbonate solution and extracted with dichloromethane. The combined organic layers were dried over sodium sulfate and the solvent removed in vacuo to give a white solid.

1. waitto stand at 4° C. an additional 16 hrs
2. extractionextracted with dichloromethane
3. dry with materialThe combined organic layers were dried over sodium sulfate
4. customthe solvent removed in vacuo
5. customto give a white solid