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Cobalt-Catalyzed CH/NO Bond Activation
作者:Krishnamoorthy Muralirajan、Ramajayam Kuppusamy、Sekar Prakash、Chien-Hong Cheng
DOI:10.1002/adsc.201501056
日期:2016.3.3
A green atom‐economical method for the synthesis of highly functionalized 1‐amino and 1‐carbon substituted isoquinolines from the reaction of N′‐hydroxybenzimidamides and aryl ketoximes, respectively, with alkynes via pentamethylcyclopentadienylcobalt(III)‐catalyzed CH/NO bond activation is described. The external oxidant‐free annulation reaction uses the =NOH moiety in N′‐hydroxybenzimidamides or
用于从反应高度官能化的1-氨基和1-碳取代的异喹啉的合成绿色原子的经济的方法N'- hydroxybenzimidamides和芳基酮肟,分别与炔烃经由pentamethylcyclopentadienylcobalt(III)催化Ç H /Ñ 描述了O键活化。外部无氧化剂环化反应在N'-羟基苯甲酰胺或N中使用= NOH部分-芳族酮肟为导向基团和内部氧化剂。该第一行过渡金属催化的环化反应可作为异喹啉合成的有效替代方法,因为水是唯一的副产物,且贵金属例如铑(III),铱(III),钯(II)和钌是贵金属(II)不是必需的。反应的进行通过Ç ħ活化,炔插入,还原消除,和N Ò活化。