Abstract
A novel one-pot N-heterocyclic carbene catalyzed synthesis of aldol products and their application to a facile and highly cis-selective synthesis of tetrahydropyran-4-ones is reported. The protocol involves carbonyl umpolung reactivity of enals in which the carbonyl carbon attacks nucleophilically on electrophilic terminal epoxides, regioselectively, to afford aldol adducts in good to excellent yields.
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