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  • Title: Asymmetric synthesis of 1,3-dioxolanes by organocatalytic formal [3 + 2] cycloaddition via hemiacetal intermediates.
    Author: Asano K, Matsubara S.
    Journal: Org Lett; 2012 Mar 16; 14(6):1620-3. PubMed ID: 22381213.
    Abstract:
    A novel asymmetric formal [3 + 2] cycloaddition reaction for the synthesis of 1,3-dioxolanes using cinchona-alkaloid-thiourea-based bifunctional organocatalysts is reported. The reaction proceeds via the formation of hemiacetal intermediates between γ-hydroxy-α,β-unsaturated ketones and aldehydes.
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