制备了全氟辛基磺酰亚胺盐(M[N(SO_2C_8F_(17))_2]_n,n:3,4),并用于催化氟两相烷基化反应.考察了催化剂种类、反应时间、反应温度和催化剂用量对烷基化反应的影响,同时探讨了Yb[N(SO_2C_8F_(17))_2]_3对烷基化试剂摩尔比为0.2%时,催化烷基化试剂与不同芳烃的反应,表明Yb[N(SO_2C_8F_(17))_2]_3是一种有效的烷基化催化剂.含有催化剂的氟相通过简单的相分离后,可回收利用.氟相重复使用5次,其催化活性降低不大.
The metal bis(perfluorooctanesulfonyl)imide complexes were prepared and used in Friedel-Crafts alkylation in fluorous biphasic system. The effects of Lewis acid catalysts,reaction time,temperature and dosage of catalysts,as well as the catalytic reaction of different alkylating agents with aromatic compounds in the presence of 0.2% molar fraction of Yb[N(SO_2C_8F_(17))_2]_3 were investigated. All the experimental results show that metal bis(perfluorooctanesulfonyl)imide complexes were more effective for Friedel-Crafts alkylation than conventional Lewis acid catalysts. Furthermore,by simple phase-separation,the fluorous phase containing only catalyst could be re-utilized up to four times with a slight decrease in activity.
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