Diastereoselective Construction of <i>syn</i>-1,3-Dioxanes via a Bismuth-Mediated Two-Component Hemiacetal/Oxa-Conjugate Addition Reaction
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The bismuth-mediated two-component hemiacetal/oxa-conjugate addition of δ-trialkylsilyloxy and δ-hydroxy α,β-unsaturated aldehydes and ketones with alkyl aldehydes provides the syn-1,3-dioxanes in a highly efficient and stereoselective manner. The key advantages of this protocol are its operational simplicity and its ability to directly access electron-withdrawing groups without recourse to oxidation state adjustments.
创建时间：
2012-02-15
