Enantioselective N‐Heterocyclic Carbene Catalyzed Cyclopentene Synthesis via the β‐Azolium Ylide
作者:Lydia Scott、Yuji Nakano、Changhe Zhang、David W. Lupton
DOI:10.1002/anie.201804271
日期:2018.8.6
cycloisomerization of electron‐poor 1,5‐dienes via the β‐azolium ylide to give enantioenriched cyclopentenes. The reaction is mediated by a chiral N‐heterocyclic carbene (NHC) catalyst, exploits readily available substrates, has good generality (17 examples), and displays excellent enantioselectivity (mostly >94:6). Studies demonstrating the viability of a related dynamic kinetic resolution are reported, as
在这里,我们报道了贫电子的1,5-二烯通过β-偶氮鎓内酯的环异构化反应,得到对映体富集的环戊烯。该反应由手性N-杂环卡宾(NHC)催化剂介导,利用容易获得的底物,具有良好的通用性(17个实例),并且显示出出色的对映选择性(大多数> 94:6)。报道了证明相关动态动力学分辨率的可行性的研究,以及具有替代系链和衍生化的研究。