Nitration of Toluene with Fluorous Biphasic System
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Toluene was nitrated effectively in fluorous phase in the presence of ytterbium(Ⅲ) perfluorooctanesulfonate(Yb(OSO2C8F17)3) catalyst. Perfluorodecalin(C10F18) was used as a fluorous solvent for this reaction. By simple separation,the fluorous phase containing catalyst has been recovered and reused for a number of times,p/o ( ratio of p-isomer to o- isomer) of the nitration product was increased to 0.92. Effects of reaction temperature,the ratio of VPFC/Vorganic solvent and the water in the reaction system on the nitration were investigated. It was observed that the optimum temperature for fluorous biphasic nitration of toluene was 80 ℃. Simultaneously,increasing the ratio of VPFC/Vorganic solvent can enhance p/o ratio.
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易文斌,蔡春.甲苯的氟两相硝化反应研究(Ⅰ)[J].含能材料,2005,13(1):52-54. YI Wen-bin, CAI Chun. Nitration of Toluene with Fluorous Biphasic System[J]. Chinese Journal of Energetic Materials,2005,13(1):52-54.