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  • Title: Diastereoselective synthesis of substituted dihydropyrans via an oxonium-ene cyclization reaction.
    Author: Saha P, Ghosh P, Sultana S, Saikia AK.
    Journal: Org Biomol Chem; 2012 Nov 21; 10(43):8730-8. PubMed ID: 23037969.
    Abstract:
    Substituted dihydropyrans can be efficiently synthesized in good yields with excellent diastereoselectivity from the reaction of aldehydes or epoxides and ethyl 3-alkyl-3-hydroxy-5-methylhex-5-enoate via an oxonium-ene cyclization reaction catalyzed by trimethylsilyl trifluoromethanesulfonate (TMSOTf) under mild conditions.
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