Enantioselective Synthesis of 2,6-<i>cis</i>-Disubstituted Tetrahydropyrans via a Tandem Catalytic Asymmetric Hydrogenation/Oxa-Michael Cyclization: An Efficient Approach to (−)-Centrolobine
作者:Jian-Hua Xie、Lu-Chuan Guo、Xiao-Hui Yang、Li-Xin Wang、Qi-Lin Zhou
DOI:10.1021/ol3020144
日期:2012.9.21
A highly efficient one-pot process via a tandem reaction of catalytic asymmetric hydrogenation and oxa-Michael cyclization for the synthesis of 2,6-cis-disubstituted tetrahydropyrans has been developed (ee up to 99.9%, cis/trans-selectivity up to 99:1). This method provides a concise route to (−)-centrolobine (68.8% yield, three steps).
已开发出一种通过催化不对称氢化和oxa-Michael环化串联反应合成2,6-顺式-二取代四氢吡喃的高效一锅法(ee高达99.9%,顺/反式选择性高达99 :1)。此方法提供了通往(-)-中心叶素的简洁途径(68.8%的产率,三个步骤)。