1,2,4-三氟苯置于2Cf3So3H-B(Oso2Cf3)3,硝酸体系中,化学反应 3.0H,以83%的收率获得产物2,3,5-三氟硝基苯
参考文献:Nitration Of Strongly Deactivated Aromatics With Superacidic Mixed Nitric-Triflatoboric Acid (Hno3/2Cf3So3H-B(O3Scf3)3)
标题:Nitration Of Strongly Deactivated Aromatics With Superacidic Mixed Nitric-Triflatoboric Acid (Hno3/2Cf3So3H-B(O3Scf3)3)
摘要:The Nitration Of Various Deactivated Arenes (Including Methanesulfonyl-,Nitro-,And Polyhalobenzenes) Was Carried Out In Good Yield With Mixed Nitric-Triflatoboric Superacid. For Example Pentafluorobenzene Gave Pentafluoronitrobenzene In 99% Yield,Nitrobenzene To M-Dinitrobenzene In 92% Selectivity With 85% Overall Yield,And Methyl Phenyl Sulfone Gave Only The M-Nitro Isomer In 78% Isolated Yield. Thus The New Nitrating System Gives High Regioselectivity And Yields Under Generally Mild Reaction Conditions. The Reagent System Is Compatible With Many Functional Groups Of Arenes.
DOI:10.1021/jo00127A048