Palladium(0)-mediated cyclization-coupling of β,γ-unsaturated oximes and aryl iodides
作者:Joshua Mikesell、Michael D. Mosher
DOI:10.1016/j.tetlet.2016.01.076
日期:2016.3
The tandem palladium(0)-mediated nucleometalation-cross coupling of β,γ-unsaturated oximes with aryl iodides has been shown to provide the expected 3,5-disubstituted 2-isoxazolines in acceptable yields (11–78%). The addition of a weak base is required for product formation. Some influence on the yield of the reaction is noted in the electronic character of the aryl iodide used in the reaction. Exploration
研究表明,β,γ-不饱和肟与芳基碘化物的串联钯(0)介导的核金属化-交叉偶联能够以可接受的收率(11-78%)提供预期的3,5-二取代的2-异恶唑啉。产品形成需要添加弱碱。反应中使用的芳基碘化物的电子特性表明对反应产率有一些影响。对反应物上取代模式的探索已导致提出了一种机制,该机制涉及钯(II)催化的核金属化/环化,然后还原消除钯(0)并伴随与芳烃的偶联。