The intramolecular oxa-conjugate addition of tethered triethylsilyloxy substituted alpha,beta-unsaturated ketones mediated by bismuth(III) nitrate pentahydrate provides a mild and efficient method for the stereoselective construction of cis-2,6-disubstituted tetrahydropyrans.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1463892 | PMC |
| http://dx.doi.org/10.1016/j.tetlet.2005.06.100 | DOI Listing |
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