Direct nucleophilic substitution of polyfluorobenzenes with pyrrole and 2,5-dimethylpyrrole
作者:Zita Tokárová、Róbert Balogh、Pavol Tisovský、Katarína Hrnčariková、Daniel Végh
DOI:10.1016/j.jfluchem.2017.10.006
日期:2017.12
have been prepared by the nucleophilic substitution of fluorine (SNAr) in hexafluorobenzene, 1-pentafluorophenyl-1H-pyrrole; 2,5-dimethyl-1-pentafluorophenyl-1H-pyrrole; 2,5-di(thiophen-2-yl)pentafluorophenyl and 2,3,5,6-tetrafluoroterephtalonitrile. The observed substitution pattern indicates the gradual defluorination of particular fluorine atoms depending on the nature and amount of the used nucleophile
通过亲核反应制备了一系列新颖的N-吡咯基- ,N-(2,5-二甲基)吡咯基-和N-(2,5-二噻吩-2-基)吡咯基-部分氟化和/或完全取代的苯。氟取代(S ñ在六氟苯的Ar),1-五氟苯基-1H-吡咯; 2,5-二甲基-1-五氟苯基-1H-吡咯; 2,5-二(噻吩-2-基)五氟苯基和2,3,5,6-四氟对苯二甲腈。观察到的取代模式表明特定氟原子逐渐脱氟,具体取决于所用亲核试剂的性质和数量(吡咯/ NaH与2,5-二甲基吡咯/ NaH)。