Elemental fluorine. Part 10.1 Selective fluorination of pyridine, quinoline and quinoxaline derivatives with fluorine–iodine mixtures
作者:Richard D. Chambers、Mandy Parsons、Graham Sandford、Christopher J. Skinner、Malcolm J. Atherton、John S. Moilliet
DOI:10.1039/a809838g
日期:——
Selective fluorination of a range of pyridine and quinoline substrates to give corresponding 2-fluoro-derivatives can be readily achieved in high yield at room temperature using elemental fluorine–iodine mixtures. Reaction of fluorine with iodine forms, in situ, systems that function like sources of both iodonium and fluoride ions and fluorination of heterocyclic derivatives is suggested to proceed
使用元素氟-碘混合物,可以很容易地在室温下高产率地实现一系列吡啶和喹啉底物的选择性氟化,得到相应的2-氟衍生物。氟与碘的反应原位反应,其功能类似于碘鎓和氟离子源,并且杂环衍生物的氟化反应是通过氟离子对中间N-碘杂环物质的攻击而进行的。喹喔啉衍生物在相似的条件下反应,生成2-氟-或2,3-二氟喹喔啉衍生物,具体取决于通过溶液的氟的比例。在相关的方法中,吡啶可以在适当的醇和氟反应后被烷氧基化。