描述了路易斯酸催化的2-取代的环丙烷1,1-二羧酸酯与硫酮的反应。当使用AlCl 3作为路易斯酸时,在温和的条件下以立体有择的方式高产率地获得了具有两个相邻的季碳原子的高度取代的四氢噻吩。此外,成功地采用了分子内方法来获得硫桥[ n .2.1]双环系统。在类似条件下,硒酮(较重的类似物)的转化导致形成各种四氢硒代苯。
Synthesis of Chiral Aza‐[n.2.1] Skeletons by Separable Epimers of Intramolecular [3+2] Cross Cycloaddition of Cyclopropane 1,1‐Diesters with Chiral Sulfinylimines
作者:Miao‐Miao Xia、Feng‐Xing Li、You‐Ping Ma、Le‐Le Song、Yan‐Ni Hou、Zi‐Fa Shi、Xiao‐Ping Cao
DOI:10.1002/adsc.201901543
日期:2020.3.4
Reported herein is the construction of chiral aza‐[n.2.1] skeletons by separable epimers of intramolecular [3+2] cross cycloaddition of cyclopropane 1,1‐diesters with chiral sulfinylimines. The epimer products can be separated by silica gel column chromatography.