Putting the brakes on a hydride shift: The incorporation of a 2-silyloxy group increases both the stability and reactivity of 5-substituted cyclopentadienes, thus facilitating their preparation and use (see scheme; Bz=benzyl, TBS=tert-butyldimethylsilyl). This approach has been applied to the synthesis of the E ring in the marine alkaloid palau'amine.
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