摘要
制备了全氟辛基磺酸稀土金属盐(RE(OPf)3,RE=La,Sm,Eu,Tb,Yb,Lu),并研究了该催化剂作用下甲苯的氟两相硝化反应。考察了催化剂用量和带有不同配体的稀土金属催化剂对反应的影响。研究表明,Yb(OPf)3和C10F18分别是最好的催化剂和氟溶剂,以Yb(OPf)3为催化剂在C10F18中甲苯硝化反应得率为56%,对位选择性为45%。含有催化剂的氟相通过简单的相分离,就可回收利用。
The catalyst of rare earth（ Ⅲ ） perfluorooctanesulfonates（RE（OPf） 3, RE = La, Sm, Eu, Tb, Yb, Lu） were prepared for the nitration of toluene in fluorous biphasic system. Perfluorohexane （ C6 F14 ）, perfluoro- methylcyclohexane （ C7 F14 ）, pcrfluoro- toluene （ C7F8 ）, perfluorooctane （ C8F18 ）, perfluorooctyl bromide （ C8 F17 Br） or perfluorodecnlin （ C10F18, cis and trans-mixture） were used as fluorous solvent respectively for this reaction. Effects of rare earth metal salts with different ligands and amount of the catalyst on the reaction were studied. The results show that Yb（OPf）3 and C10F18 are the best catalyst and fluorous solvent respectively. The yield of nitration of toluene is 56% by using Yb（OPf） 3 as a catalyst and C10 F18 as a fluorous solvent, and para-seleetivity is 45% ; By simple separation of the fluorous phase containing only catalyst, nitration can be repeated many times.
出处
《含能材料》
EI
CAS
CSCD
2006年第1期29-31,共3页
Chinese Journal of Energetic Materials
基金
国防科工委"十五"预研项目(40406020103)
关键词
有机化学
氟两相硝化
全氟溶剂
全氟辛基磺酸稀土金属盐
甲苯
organic chemistry
nitration with fiuorous biphasic system
perfluorocarbon
rare earth （ Ⅲ ） perfluorooctanesulfonate
toluene
