A simple gram-scale method for the preparation of esters and dialkylamides of 2-(fluoro/iodo)-2H-azirine-2-carboxylic acids via the halogen exchange (Halex) reaction of 2-bromo-substituted analogues is reported. The method operates with inexpensive and safe reagents, Bu4NF and potassium iodide, providing high product yields. Alternatively, 2-fluoro-2H-azirine-2-carboxylates can be prepared from 2-iodo-
为酯和2-二烷基酰胺的制备简单克尺度方法(
氟/
碘)-2 ħ报道通过2-
溴取代的类似物的卤素交换(哈莱克斯)反应-azirine -2-
羧酸。该方法使用廉价,安全的试剂,Bu 4 NF和
碘化钾运行,可提供较高的产品收率。备选地,2-
氟-2- ħ -azirine -2-
羧酸盐可以由2-
碘-和2-
氯-类似物制备。后者的化合物可以通过用Bu 4 NCl处理2-
碘-和2-
溴-2 H-
叠氮基-2-
羧酸酯以实际上定量的产率获得。