Chirality Transfer in Au-Catalyzed Cyclization Reactions of Monoallylic Diols: Selective Access to Specific Enantiomers Based on Olefin Geometry
作者:Aaron Aponick、Berenger Biannic
DOI:10.1021/ol200203k
日期:2011.3.18
The gold(I)-catalyzed cyclization of monoallylic diols to form tetrahydropyrans is shown to be highly stereoselective when chiral allylic alcohols are employed. Substrates that differ only in olefin geometry provide enantiomeric products from formal SN2′ reactions in high yields with excellent chirality transfer. The allylic alcohol stereochemistry also efficiently controls the facial selectivity when
当使用手性烯丙基醇时,金(I)催化的单烯丙基二醇的环化以形成四氢吡喃显示出高度立体选择性。仅在烯烃几何形状上不同的底物以高收率和良好的手性转移提供了来自正式S N 2'反应的对映体产物。当底物包括另外的立体中心时,烯丙醇的立体化学也有效地控制了面部选择性。