Stereoselective Synthesis of 2,6-<i>cis</i>-Tetrahydropyrans through a Tandem Allylic Oxidation/Oxa-Michael Reaction Promoted by the<i>gem</i>-Disubstituent Effect: Synthesis of (+)-Neopeltolide Macrolactone
作者:Hyoungsu Kim、Yongho Park、Jiyong Hong
DOI:10.1002/anie.200903690
日期:2009.9.28
protecting groups is one highlight of a concise and efficient synthesis of (+)‐neopeltolide macrolactone on the basis of the title tandemreaction and dithiane coupling reactions (see scheme). The gem‐disubstituent effect of the dithiane moiety promoted the oxa‐Michael reaction following allylic oxidation to ensure the efficient synthesis of the 2,6‐cis‐tetrahydropyran and high diastereoselectivity.