From common carbohydrates to enantiopure cyclooctane polyols and glycomimetics via deoxygenative zirconocene ring contraction.
Leo A Paquette, Yunlong Zhang
Index: J. Org. Chem. 71(12) , 4353-63, (2006)
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Abstract
D-Arabinose and D-glucose are transformed into the identical vinyl furanoside, whose role is to serve as the precursor to enantiopure cyclooctadienone 6. The key steps of this relay involve a zirconocene-promoted ring contraction and [3,3] sigmatropic rearrangement of an enynol. Subsequently defined are convenient synthetic routes to several cyclooctane-1,2,3-triols, 1,2,3,4,5-pentaols, and structurally related glycomimetics.
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