Fluorination with xenon difluoride. Reactions of phenyl-substituted olefins in the presence of trifluoroacetic acid
作者:Marko Zupan、Alfred Pollak
DOI:10.1016/0040-4020(77)80219-6
日期:1977.1
Trifluoroacetic acid-catalyzed liquid-phase fluorination with xenon difluoride of phenyl-substituted olefins, e.g. cis- and trans-1-phenylpropene and cis- and trans-stilbene, results in the formation of vicinal difluorides and fluoro-trifluoroacetates. The reaction is non-stereospecific. d,1-Erythro and d,1-threo fluoro-trifluoroacetates are formed in a highly regiospecific Markovnikov manner in 50%
用苯基取代的烯烃(例如顺式和反式-1-苯基丙烯以及顺式和反式二苯乙烯)的二氟化氙气催化的三氟乙酸液相氟化,导致形成邻位二氟化物和三氟氟乙酸盐。该反应是非立体特异性的。d,1-赤型和d,1-苏式氟-三氟乙酸盐以高度区域特异性的马尔科夫尼科夫方式形成,产率为50%。建议形成β-氟碳鎓离子。