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Furan was deprotonated on treatment with 1/3equiv of Bu 3 MgLi in THF at rt. The lithium arylmagnesate formed was either trapped with electrophiles or involved in a palladium-catalyzed cross-coupling reaction with 2-bromopyridine. The highly coordinated magnesate Bu 4 MgLi 2 (1/3equiv) proved to be a better deprotonating agent than Bu 3 MgLi; the monitoring of the reaction...
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