Heterocyclic polyfluoro-compounds. Part XII. Synthesis and some reactions of 2,3,5,6-tetrafluoro-4-iodopyridine
作者:R. E. Banks、R. N. Haszeldine、E. Phillips、I. M. Young
DOI:10.1039/j39670002091
日期:——
oxidation of 2,3,5,6-tetrafluoro-4-hydrazinopyridine in the presence of methyl iodide or, preferably, by reaction of pentafluoropyridine with sodium iodide in dimethylformamide, is readily converted into 2,3,5,6-tetrafluoropyridylmagnesium iodide or 2,3,5,6-tetrafluoropyridyllithium; some reactions of these organometallic compounds are described. Hydroxide ion, methoxide ion, and ammonia attack 2,3,5
2,3,5,6-四氟-4-碘吡啶,是通过在甲基碘存在下氧化2,3,5,6-四氟-4-肼基吡啶制备的,或最好是使五氟吡啶与碘化钠在二甲基甲酰胺中反应制得容易地转化为2,3,5,6-四氟吡啶基碘化镁或2,3,5,6-四氟吡啶基锂; 描述了这些有机金属化合物的一些反应。氢氧根离子,甲醇根离子和氨在2位上攻击2,3,5,6-四氟-4-碘吡啶,生成相应的2-取代的三氟-4-碘吡啶,但碘离子似乎在4位上进攻。与碘取代形成2,3,5,6-四氟吡啶基阴离子。通过乌尔曼技术将四氟-4-碘吡啶偶联,得到全氟-4,4'-联吡啶基。3-氯-2,4,5的反应