Stereoselective Synthesis of 2,6-cis- and 2,6-trans-Piperidines through Organocatalytic Aza-Michael Reactions: A Facile Synthesis of (+)-Myrtine and (−)-Epimyrtine
摘要:
Both 2,6-cis- and 2,6-trans-piperidines were prepared from common substrates through organocatalytic aza-Michael reactions promoted by the gem-disubstituent effect in conjunction with dithiane coupling reactions. The organocatalytic aza-Michael reaction enabled a facile synthesis of (+)-myrtine and (-)-epimyrtine from a common substrate.
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.
Stereoselective Synthesis of 2,6-<i>cis</i>- and 2,6-<i>trans</i>-Piperidines through Organocatalytic Aza-Michael Reactions: A Facile Synthesis of (+)-Myrtine and (−)-Epimyrtine
作者:Yongcheng Ying、Hyoungsu Kim、Jiyong Hong
DOI:10.1021/ol103064f
日期:2011.2.18
Both 2,6-cis- and 2,6-trans-piperidines were prepared from common substrates through organocatalytic aza-Michael reactions promoted by the gem-disubstituent effect in conjunction with dithiane coupling reactions. The organocatalytic aza-Michael reaction enabled a facile synthesis of (+)-myrtine and (-)-epimyrtine from a common substrate.