The reaction of fluoroxysulfate, sof-. liith aromatic compounds: catalysis by acids
作者:Evan H. Appelman、Louis J. Basile、Ryoichi Hayatsu
DOI:10.1016/0040-4020(84)85119-4
日期:1984.1
nitrobenzene and naphthalene in CH3CN have been studied. The catalys general accelerate reaction and enhance yields of ring-fluorinated products. Efficacity roughly parallels H0 of the acids, though H2S04 is more effective than stronger acids for the fluorination of naphthalene. Combined room temperature yields of fluorine-substituted products are as much as 45-50% for toluene and naphthalene and up to 30%
酸催化剂HF,H 2 SO 4,BF 3,CF 3 SO 3 H,FSO 3 H和SbF 5 .FS0 3 H对CsSO 4 F与甲苯,硝基苯和萘在CH 3 CN中反应的影响已经研究过了。催化剂通常会加速反应并提高环氟化产物的收率。效率大致与酸的H 0相似,尽管H 2 S0 4在萘的氟化中比强酸更有效。甲苯和萘的氟取代产物在室温下的总收率高达45-50%,硝基苯高达30%。主要产物是邻氟甲苯,1-氟萘和间氟硝基苯。使用萘时,异构体的选择性大大低于不使用催化剂时的异构体选择性。获得低产率(10%)的单体含氧产物,以及相当大的含氧和含氟二聚体和高级聚合物。用酸催化的亲电氟化或氧合,接着是氟化产物的进一步氟化和/或自由基诱导的氧化偶合来解释结果。