Easy Access to Isoquinolines and Tetrahydroquinolines from Ketoximes and Alkynes via Rhodium-Catalyzed C−H Bond Activation
作者:Kanniyappan Parthasarathy、Chien-Hong Cheng
DOI:10.1021/jo902084j
日期:2009.12.18
herein is a convenient and highly regioselective synthesis of substituted isoquinoline derivatives from various aromatic ketoximes and alkynes via a one-pot, rhodium-catalyzed C−H bond activation. In addition, tetrahydroquinoline derivatives are formed in good yields from 2-arylidene-1-cyclohexanone oximes possessing an exocyclic double bond and from tetrahydroxanthone oximes. A possible mechanism is
本文描述的是通过一锅铑催化的CH键活化,从各种芳族酮肟和炔烃中方便,高度区域选择性地合成取代的异喹啉衍生物。另外,由具有环外双键的2-亚芳基-1-环己酮肟和由四氢蒽酮肟以高收率形成四氢喹啉衍生物。提出了一种可能的机制,该机制涉及通过将Rh(I)氧化加成至邻-CH键,螯合炔烃,还原消除,分子内电环化和芳构化来进行螯合辅助的CH活化。通过分离邻链烯基化产物7p和7q来支持该机理。。本文还描述了sp 3 CH键的铱催化活化的实例。