Povarov Reaction of Cycloiminium Formed in Situ via Hydroamination Cycloisomerization of Homopropargylic Amines with Electron-Rich Olefins
作者:Qiangqiang Liu、Chan Wang、Qiang Li、Yajie Hou、Ye Wu、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1021/acs.joc.6b02496
日期:2017.1.20
A new, one-pot cascade reaction of homopropargylic amines with electron-rich olefins is developed in the presence of Cu(OTf)2 and affords a series of octahydrofuro[3,2-c]pyrrolo[1,2-a]quinoline derivatives in yields of 38–80%. This reaction proceeds through an intramolecular hydroamination cyclization of homopropargylic amine to generate a highly reactive cycloenamine intermediate in situ that subsequently
在Cu(OTf)2存在下开发了一种新的单炔胺与富电子烯烃的级联反应,并提供了一系列八氢呋喃[3,2- c ]吡咯并[1,2- a ]喹啉衍生物收率为38–80%。该反应通过高炔丙基胺的分子内加氢胺化反应进行,以生成高反应性的环烯胺中间体,该中间体随后异构化成环亚胺阳离子,然后与二氢呋喃,二氢吡喃或二氢吡咯进行Povarov型反应。值得注意的是,Al 2 O 3添加剂在有效抑制高炔丙基胺竞争性二聚方面起着关键作用。