胍基锂化合物的合成、晶体结构及催化异氰酸酯三聚反应  

Synthesis,Crystal Structure and Its Application in Trimerization of Isocyanates of a Guanidinatolithium Complex

作　　者：高晓娜[1,2] 韩红斐 郭志强 魏学红[2,3] 

机构地区：[1]运城学院应用化学系,山西运城044000 [2]山西大学化学化工学院,山西太原030006 [3]山西大学大型科学仪器研究中心,山西太原030006

出　　处：《山西大学学报（自然科学版）》2017年第4期854-858,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：山西省煤基重点科技攻关项目(MH2014-07);山西省自然科学基金(201601D202091)

摘　　要：以二乙胺、正丁基锂和不对称的碳化二亚胺PhN=C=NCy反应,生成一个新的胍基锂化合物,[(Et)_2NC(NCy)(NPh)LiOEt_2]_2(1),该化合物通过元素分析、~1 H NMR、^(13) C NMR和X-ray单晶衍射等完整的结构表征。另外,研究了该胍基锂化合物(1)对芳香异氰酸酯三聚合成异氰脲酸酯的催化效果。实验结果表明,在室温条件下,当催化剂1和底物的摩尔比为0.5%,反应时间为10min时,三聚合成异氰脲酸酯的产率最高可达到99%。Treatment of diethyl amide with n-butyl lithium and unsymmetric carbodiimine PhN = C= NCy afforded a new guanidinatolithium complex, E（Et）2NC（NCy）（NPh）LiOEtz]2 （1）, which was characterized by elemental analyses, ^1H, ^13C NMR spectra and single crystal X-ray diffraction analysis. In addition, the trimerization of aryl isocyanates to aryl isocyanurates catalyzed by the guanidinatolithium complex （1） was also investigated. The experimental results showed that the yield of aryl isocyanurate by the trimerization reaction was up to 99% when mol ratio of 1 as pre-catalyst to substrate is 0. 5% ,and reaction time is for 10 min at room temperature.

关 键 词：胍基锂化合物 合成 晶体结构 催化 

分 类 号：O627[理学—有机化学]