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À propos de : Diastereoselective Prins-Type Reaction of CycloalkenylcyclopropanolSilyl Ethers and α,β-Unsaturated Aldehyde Acetals        

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  • Diastereoselective Prins-Type Reaction of CycloalkenylcyclopropanolSilyl Ethers and α,β-Unsaturated Aldehyde Acetals
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  • Electrophilic addition of 1-(1-cyclohexenyl)-1-cyclopropanol trimethylsilyl ether to α,β-unsaturatedaldehyde acetals under Lewis acidic conditions proceeds with good to excellent diastereoselectivity toafford spirocyclobutanones containing three contiguous stereocenters. A convenient entry to enantioselective syntheses is available by use of a nonracemic C2-symmetric acetal. Elaboration of the resultingadducts provides ready access to medium-sized carbocycles.
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