高分子负载Yb(NTf_2)_3催化酯化及硝化反应  

Polymer-Supported Yb(NTf_2)_3 as Catalyst for Esterification and Nitration

作　　者：张正波[1] 周三一[1] 聂进[1] 刘文明[1] 刘恋[1] 

机构地区：[1]华中科技大学化学系,武汉430074

出　　处：《应用化学》2006年第8期897-901,共5页Chinese Journal of Applied Chemistry

摘　　要：报道了高分子负载Yb(NTf2)3催化剂的制备方法。将其作为非均相催化剂,应用于苯甲酸乙酯的合成反应和甲苯的硝化反应,并考察了催化剂的重复使用性能。在80℃下,摩尔分数为10%的Yb(NTf2)3负载催化剂,反应6 h可使苯甲酸乙酯的产率达95%;摩尔分数为5%的Yb(NTf2)3负载催化剂,反应5 h可使甲苯与等摩尔质量分数为65%硝酸的硝化反应转化率达99%。Polymer-supported Yb （NTf2 ）3 was prepared in this paper. As a novel heterogeneous Lewis acid catalyst, its catalytic activity was investigated for the esterification of benzoic acid with ethanol and nitration of toluene, and its recycling ability was also studied. At 80 ℃, the yield of esterification of benzoic acid with ethanol could reach 95% by using 10% （molar fraction） catalyst for 6 h; the conversion of toluene in the nitration with 1 equiv, of 65% （ mass ratio） nitric acid could be achieved to 99% by using 5% （ molar fraction） catalyst for 5 h.

关 键 词：高分子负载 Yb(NTf2)2 LEWIS酸催化 酯化 硝化 

分 类 号：O621.2[理学—有机化学]